folder,id,display_name,description,type,units,domain,labels,calculation,commonly_used,forms
Administrative,daystomonth09,Days from baseline to 9-month visit,"",numeric,days,"","","","",""
Administrative,daystomonth18,Days from baseline to 18-month visit,"",numeric,days,"","","","",""
Administrative,daystosurgery,Days from baseline to laparoscopic gastric banding (LGB) surgery,"",numeric,days,"","","","",""
Administrative,nsrrid,NSRR subject identifier,The National Sleep Research Resource (NSRR) subject identifier links the subject's data and files.,identifier,"","","","",true,""
Administrative,rand_siteid,Site identifier,Recruitment site was a stratification factor for randomization.,choices,"",siteid,"","",true,""
Administrative,rand_treatmentarm,Randomized treatment arm,"",choices,"",treatment_arm,"","",true,""
Administrative,surgery_occurred,Surgery occurred,The subject underwent laparoscopic gastric banding (LGB) surgery.,choices,"",noyes,"","","",""
Administrative,visitnumber,Visit number,"",choices,"",visitnumber,"","",true,""
Anthropometry,bmi,Body mass index (BMI),"",numeric,kilograms per meter squared (kg/m2),"","","",true,""
Anthropometry,height,Height,"",numeric,centimeters (cm),"","","","",""
Anthropometry,weight,Weight,"",numeric,kilograms (kg),"","","","",""
Clinical Data/Laboratory Tests,active_ghrelin,Active Ghrelin,"",numeric,pg/mL,"","","","",""
Clinical Data/Laboratory Tests,adiponectin_hmw,Adiponectin - HMW,"",numeric,ug/mL,"","","","",""
Clinical Data/Laboratory Tests,adiponectin_total,Adiponectin - Total,"",numeric,ug/mL,"","","","",""
Clinical Data/Laboratory Tests,bloods_creactivepro,"C-Reactive Protein, Cardiac","",numeric,mg/L,"","","","",""
Clinical Data/Laboratory Tests,bloods_datetest,Date of Test,"",numeric,"","","","","",""
Clinical Data/Laboratory Tests,bloods_fibrinactivity,Fibrinogen Activity,"",numeric,mg/dL,"","","","",""
Clinical Data/Laboratory Tests,bloods_hdlchol,HDL Cholesterol,"",numeric,mg/dL,"","","","",""
Clinical Data/Laboratory Tests,bloods_hemoa1c,Hemoglobin A1c ,"",numeric,%,"","","","",""
Clinical Data/Laboratory Tests,bloods_ldlcholcalc,LDL Cholesterol Calc,"",numeric,mg/dL,"","","","",""
Clinical Data/Laboratory Tests,bloods_serumgluc,"Glucose, Serum","",numeric,mg/dL,"","","","",""
Clinical Data/Laboratory Tests,bloods_studyvisit,Study Visit,"",numeric,"","","","","",""
Clinical Data/Laboratory Tests,bloods_totalchol,"Cholesterol, Total","",numeric,mg/dL,"","","","",""
Clinical Data/Laboratory Tests,bloods_triglyc,Triglycerides,"",numeric,mg/dL,"","","","",""
Clinical Data/Laboratory Tests,bloods_urinecreatin,"Creatinine, Urine","",numeric,mg/dL,"","","","",""
Clinical Data/Laboratory Tests,bloods_urinemicro,"Microalbumin, Urine","",numeric,ug/mL,"","","","",""
Clinical Data/Laboratory Tests,bloods_vldlcholcal,VLDL Cholesterol Cal,"",numeric,mg/dL,"","","","",""
Clinical Data/Laboratory Tests,epinephrine,Epinephrine,"",numeric,ng/mL,"","","","",""
Clinical Data/Laboratory Tests,il6,Il-6,"",numeric,pg/mL,"","","","",""
Clinical Data/Laboratory Tests,insulin,Insulin,"",numeric,uIU/mL,"","","","",""
Clinical Data/Laboratory Tests,leptin,Leptin,"",numeric,ng/mL,"","","","",""
Clinical Data/Laboratory Tests,leptin_ceiling,Leptin was at ceiling (>100),"",choices,"",leptin_ceiling,"","","",""
Clinical Data/Laboratory Tests,norepinephrine,Norepinephrine,"",numeric,ng/mL,"","","","",""
Clinical Data/Laboratory Tests,pai1,Pai-1,"",numeric,ng/mL,"","","","",""
Clinical Data/Laboratory Tests,pai1_ceiling,PAI-1 was at ceiling (>20),"",choices,"",pai1_ceiling,"","","",""
Clinical Data/Laboratory Tests,probnp,proBNP,"",numeric,pg/mL,"","","","",""
Clinical Data/Laboratory Tests,resistin,Resistin,"",numeric,ng/mL,"","","","",""
Clinical Data/Laboratory Tests,uacr,Urine albumin / urine creatinine ratio,(bloods_urinemicro / bloods_urinecreatin) * 100,numeric,"","","","","",""
Clinical Data/Laboratory Tests,uepicr,Urine epinephrine / urine creatinine ratio,(epinephrine / bloods_urinecreatin) / 10,numeric,"","","","","",""
Clinical Data/Laboratory Tests,unorepicr,Urine norepinephrine / urine creatinine ratio,(norepinephrine / bloods_urinecreatin) / 10,numeric,"","","","","",""
Demographics,age,Age of the participant,"",numeric,years,"","","",true,""
Demographics,ethnicity,Ethnicity (Hispanic or Latino) of the participant,"""Hispanic or Latino"" is defined as a person of Cuban, Mexican, Puerto Rican, South or Central American or other Spanish culture or origin regardless of race.",choices,"",ethnicity,race,"",true,""
Demographics,gender,Gender of the participant,"",choices,"",gender,"","",true,""
Demographics,race,Race of the participant,"",choices,"",race,"","",true,""
General Health/Gastrointestinal Quality of Life Index,giqli_emot,Gastrointestinal Quality of Life Index: Emotions subscore,"The subscale score is based on 5 items from the Gastrointestinal Quality of Life Index. A high score suggests better emotional status. [Eypasch E et al.,1995 (PubMed ID: 7749697)](https://pubmed.ncbi.nlm.nih.gov/7749697/)
[Search for all GIQLI variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=giqli)",numeric,"","",giqli;giqli_emo,"","",""
General Health/Gastrointestinal Quality of Life Index,giqli_emot_w,Gastrointestinal Quality of Life Index: Emotions subscore (weighted),"The subscale score is based on 5 items from the Gastrointestinal Quality of Life Index. A high score suggests better emotional status. [Eypasch E et al.,1995 (PubMed ID: 7749697)](https://pubmed.ncbi.nlm.nih.gov/7749697/)
[Search for all GIQLI variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=giqli)",numeric,"","",giqli;giqli_emo,"","",""
General Health/Gastrointestinal Quality of Life Index,giqli_med,Gastrointestinal Quality of Life Index: Medical treatment subscore,"The subscale score is based on one item from the Gastrointestinal Quality of Life Index. A high score suggests less medical treatment. [Eypasch E et al.,1995 (PubMed ID: 7749697)](https://pubmed.ncbi.nlm.nih.gov/7749697/)
[Search for all GIQLI variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=giqli)",numeric,"","",giqli;giqli_med,"","",""
General Health/Gastrointestinal Quality of Life Index,giqli_namecode,Namecode,"",numeric,"","",giqli,"","",""
General Health/Gastrointestinal Quality of Life Index,giqli_phys,Gastrointestinal Quality of Life Index: Physical function subscore,"The subscale score is based on 7 items from the Gastrointestinal Quality of Life Index. A high score suggests better physical function. [Eypasch E et al.,1995 (PubMed ID: 7749697)](https://pubmed.ncbi.nlm.nih.gov/7749697/)
[Search for all GIQLI variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=giqli)",numeric,"","",giqli;giqli_phy,"","",""
General Health/Gastrointestinal Quality of Life Index,giqli_phys_w,Gastrointestinal Quality of Life Index: Physical function subscore (weighted),"The subscale score is based on 7 items from the Gastrointestinal Quality of Life Index. A high score suggests better physical function. [Eypasch E et al.,1995 (PubMed ID: 7749697)](https://pubmed.ncbi.nlm.nih.gov/7749697/)
[Search for all GIQLI variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=giqli)",numeric,"","",giqli;giqli_phy,"","",""
General Health/Gastrointestinal Quality of Life Index,giqli_social,Gastrointestinal Quality of Life Index: Social function subscore,"The subscale score is based on 4 items from the Gastrointestinal Quality of Life Index. A high score suggests better social function. [Eypasch E et al.,1995 (PubMed ID: 7749697)](https://pubmed.ncbi.nlm.nih.gov/7749697/)
[Search for all GIQLI variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=giqli)",numeric,"","",giqli;giqli_soc,"","",""
General Health/Gastrointestinal Quality of Life Index,giqli_social_w,Gastrointestinal Quality of Life Index: Social function subscore (weighted),"The subscale score is based on 4 items from the Gastrointestinal Quality of Life Index. A high score suggests better social function. [Eypasch E et al.,1995 (PubMed ID: 7749697)](https://pubmed.ncbi.nlm.nih.gov/7749697/)
[Search for all GIQLI variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=giqli)",numeric,"","",giqli;giqli_soc,"","",""
General Health/Gastrointestinal Quality of Life Index,giqli_studyvisit,Study ID,"",numeric,"","",giqli,"","",""
General Health/Gastrointestinal Quality of Life Index,giqli_symp,Gastrointestinal Quality of Life Index: Symptoms subscore,"The subscale score is based on 19 items from the Gastrointestinal Quality of Life Index. A high score suggests fewer symptoms. [Eypasch E et al.,1995 (PubMed ID: 7749697)](https://pubmed.ncbi.nlm.nih.gov/7749697/)
[Search for all GIQLI variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=giqli)",numeric,"","",giqli;giqli_symp,"","",""
General Health/Gastrointestinal Quality of Life Index,giqli_symp_w,Gastrointestinal Quality of Life Index: Symptoms subscore (weighted),"The subscale score is based on 19 items from the Gastrointestinal Quality of Life Index. A high score suggests fewer symptoms. [Eypasch E et al.,1995 (PubMed ID: 7749697)](https://pubmed.ncbi.nlm.nih.gov/7749697/)
[Search for all GIQLI variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=giqli)",numeric,"","",giqli;giqli_symp,"","",""
General Health/Gastrointestinal Quality of Life Index,giqli_total,Gastrointestinal Quality of Life Index: Global score,"The total score is based on four subscale scores from the Gastrointestinal Quality of Life Index. A high score suggests better health-related quality of life. [Eypasch E et al.,1995 (PubMed ID: 7749697)](https://pubmed.ncbi.nlm.nih.gov/7749697/)
[Search for all GIQLI variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=giqli)",numeric,"","",giqli;giqli_total,"","",""
General Health/Gastrointestinal Quality of Life Index,giqli_total_w,Gastrointestinal Quality of Life Index: Global score (weighted),"The total score is based on four subscale scores from the Gastrointestinal Quality of Life Index. A high score suggests better health-related quality of life. [Eypasch E et al.,1995 (PubMed ID: 7749697)](https://pubmed.ncbi.nlm.nih.gov/7749697/)
[Search for all GIQLI variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=giqli)",numeric,"","",giqli;giqli_total,"","",""
Harmonized/Anthropometry,nsrr_bmi,Body mass index (BMI),"Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: :bmi: at Baseline",numeric,kilograms per square meter,"",bmi_baseline_1,"",true,""
Harmonized/Demographics,nsrr_age,Subject age,"Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: :age: at Baseline",numeric,years,"",age_at_index ,"",true,""
Harmonized/Demographics,nsrr_age_gt89,Indicates whether the subject's age (in years) used during date obfuscation is greater than 89 years,"Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: :age: at Baseline",choices,"",nsrr_age_gt89,age_at_index_gt89,"",true,""
Harmonized/Demographics,nsrr_ethnicity,Subject ethnicity,"Original missing value is recoded as ""not reported"".
Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: :ethnicity: at Baseline",choices,"",nsrr_ethnicity,ethnicity,"",true,""
Harmonized/Demographics,nsrr_race,Subject race,"Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: :race: at Baseline",choices,"",nsrr_race,race,"",true,""
Harmonized/Demographics,nsrr_sex,Subject sex,"Harmonized by the NSRR team to align with TOPMed and BioDataCatalyst standards. Source: :gender: at Baseline",choices,"",nsrr_sex,annotated_sex,"",true,""
Harmonized/Polysomnography/Apnea-Hypopnea Indices,nsrr_ahi_hp3r_aasm15,Apnea-Hypopnea Index : (All apneas + hypopneas with >=30% nasal cannula [or alternative sensor] reduction and >= 3% oxygen desaturation or with arousal) / hour of sleep ,"Harmonized by the NSRR team.
The definition for hypopneas is consistent with the following clinical guidelines: (1) American Academy of Sleep Medicine (AASM) 2007 Manual (2012 update) (recommended). [Berry RB et al. 2012 (PubMed ID:23066376)] (https://www.ncbi.nlm.nih.gov/pubmed/23066376), and (2) American Academy of Sleep Medicine (AASM) 2015 (recommended) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.]
Refer to the source for detailed definition for respiratory events: :ahi_ap0uhp3x3r_f1t1:",numeric,events per hour,"",ahi_ap0uhp3x3r_f1t1,"",true,""
Harmonized/Polysomnography/Apnea-Hypopnea Indices,nsrr_ahi_hp3u,Apnea-Hypopnea Index : (All apneas + hypopneas with >= 3% oxygen desaturation) / hour of sleep ,Harmonized by the NSRR team. Refer to the source for detailed definition for respiratory events: :ahi_ap0uhp3x3u_f1t1:,numeric,events per hour,"",ahi_ap0uhp3x3u_f1t1,"",true,""
Harmonized/Polysomnography/Apnea-Hypopnea Indices,nsrr_ahi_hp4r,Apnea-Hypopnea Index : (All apneas + hypopneas with >= 4% oxygen desaturation or with arousal) / hour of sleep ,Harmonized by the NSRR team. Refer to the source for detailed definition for respiratory events: :ahi_ap0uhp3x4r_f1t1:,numeric,events per hour,"",ahi_ap0uhp3x4r_f1t1,"",true,""
Harmonized/Polysomnography/Apnea-Hypopnea Indices,nsrr_ahi_hp4u_aasm15,Apnea-Hypopnea Index : (All apneas + hypopneas with >=30% nasal cannula [or alternative sensor] reduction with >= 4% oxygen desaturation) / hour of sleep,"Harmonized by the NSRR team.
The definition of hypopnea events is consistent with the following clinical guidelines: (1) AASM 2012 update (alternative) Berry RB et al. 2012 (PubMed ID:23066376), and (2) AASM 2015 (acceptable) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.].
Refer to the source for detailed definition for respiratory events: :ahi_ap0uhp3x4u_f1t1:",numeric,events per hour,"",ahi_ap0uhp3x4u_f1t1,"",true,""
Harmonized/Polysomnography/Sleep Architecture,nsrr_ttldursp_f1,Total Sleep Duration: the interval between sleep onset and sleep offset while the participant is asleep from polysomnography,"Conventionally, this would be called total sleep time (TST) (i.e. total time spent in stage 1 or greater).
Harmonized by the NSRR team. Source: :ttldursp_f1t1:",numeric,minutes,"",ttldursp_f1t1,"",true,""
Sleep Monitoring/Polysomnography,ahi_ap0uhp3x3r_f1t1,Apnea-Hypopnea Index: (All apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography,"Calculated - Summary metric of sleep disordered breathing events. The definition for hypopneas is consistent with the following clinical guidelines: (1) American Academy of Sleep Medicine (AASM) 2007 Manual (2012 update) (recommended). [Berry RB et al. 2012 (PubMed ID:23066376)](https://www.ncbi.nlm.nih.gov/pubmed/23066376), and (2) American Academy of Sleep Medicine (AASM) 2015 (recommended) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.]
[Search for all AHI variables consistent with the same clinical guidelines within this dataset](https://sleepdata.org/datasets/abc/variables?search=aasm15_recommended)",numeric,events per hour,"",ahi_a0h3a;ahi_a0uh3x3r;ahi_ap0uhp3x3r;aasm15_recommended,60 * (hremba3 + hroa3 + hnrba3 + hnroa3 + urbpa3 + uropa3 + unrbpa3 + unropa3 + carbp + carop + canbp + canop + oarbp + oarop + oanbp + oanop ) / ttldursp,"",""
Sleep Monitoring/Polysomnography,ahi_ap0uhp3x3u_f1t1,Apnea-Hypopnea Index: (All apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography,Calculated - Summary metric of sleep disordered breathing events.,numeric,events per hour,"",ahi_a0h3;ahi_a0uh3x3u;ahi_ap0uhp3x3u,60 * (hrembp3 + hrop3 + hnrbp3 + hnrop3 + urbp3 + urop3 + unrbp3 + unrop3 + carbp + carop + canbp + canop + oarbp + oarop + oanbp + oanop) / ttldursp,true,""
Sleep Monitoring/Polysomnography,ahi_ap0uhp3x4r_f1t1,Apnea-Hypopnea Index: (All apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography,Calculated - Summary metric of sleep disordered breathing events.,numeric,events per hour,"",ahi_a0h4a;ahi_a0uh3x4r;ahi_ap0uhp3x4r,60 * (hremba4 + hroa4 + hnrba4 + hnroa4 + urbpa4 + uropa4 + unrbpa4 + unropa4 + carbp + carop + canbp + canop + oarbp + oarop + oanbp + oanop / ttldursp,"",""
Sleep Monitoring/Polysomnography,ahi_ap0uhp3x4u_f1t1,Apnea-Hypopnea Index: (All apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography,"Calculated - Summary metric of sleep disordered breathing events. The definition of hypopnea events is consistent with the following clinical guidelines: (1) AASM 2012 update (alternative) [Berry RB et al. 2012 (PubMed ID:23066376)] (https://www.ncbi.nlm.nih.gov/pubmed/23066376), and (2) AASM 2015 (acceptable) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.].
[Search for all AHI variables consistent with the same clinical guidelines within this dataset](https://sleepdata.org/datasets/abc/variables?search=aasm15_acceptable)",numeric,events per hour,"",ahi_a0h4;ahi_a0uh3x4u;ahi_ap0uhp3x4u;aasm15_acceptable,60 * (hrembp4 + hrop4 + hnrbp4 + hnrop4 + urbp4 + urop4 + unrbp4 + unrop4 + carbp + carop + canbp + canop + oarbp + oarop + oanbp + oanop ) / ttldursp,true,""
Sleep Monitoring/Polysomnography,avglvlhr_f1t1,Average heart rate during total sleep duration from type I polysomnography,"",numeric,beats per minute (bpm),"",bpmavg;avghr;avglvlhr,"","",""
Sleep Monitoring/Polysomnography,avglvlsa_f1t1,Average oxygen saturation level in total sleep duration from type I polysomnography,"",numeric,percent (%),"",avgsat;avglvlsa,"","",""
Sleep Monitoring/Polysomnography,cahi_ca0uhp3x3r_f1t1,Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with > 3% desaturation or with arousal) / hour of sleep from type I polysomnography,"Calculated - Summary metric of sleep disordered breathing events. The definition for hypopneas is consistent with the following clinical guidelines: (1) American Academy of Sleep Medicine (AASM) 2007 Manual (2012 update) (recommended). [Berry RB et al. 2012 (PubMed ID:23066376)] (https://www.ncbi.nlm.nih.gov/pubmed/23066376), and (2) American Academy of Sleep Medicine (AASM) 2015 (recommended) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.]
[Search for all AHI variables consistent with the same clinical guidelines within this dataset](https://sleepdata.org/datasets/abc/variables?search=aasm15_recommended)",numeric,events per hour,"",ahi_c0h3a;cahi_c0uh3x3r;cahi_ca0uhp3x3r;aasm15_recommended,60 * (hremba3 + hroa3 + hnrba3 + hnroa3 + urbpa3 + uropa3 + unrbpa3 + unropa3 + carbp + carop + canbp + canop) / ttldursp,"",""
Sleep Monitoring/Polysomnography,cahi_ca0uhp3x3u_f1t1,Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with > 3% desaturation and with or without arousal) / hour of sleep from type I polysomnography from type I polysomnography,Calculated - Summary metric of sleep disordered breathing events.,numeric,events per hour,"",ahi_c0h3;cahi_c0uh3x3u;cahi_ca0uhp3x3u,60 * (hrembp3 + hrop3 + hnrbp3 + hnrop3 + urbp3 + urop3 + unrbp3 + unrop3 + carbp + carop + canbp + canop) / ttldursp,"",""
Sleep Monitoring/Polysomnography,cahi_ca0uhp3x4r_f1t1,Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with > 4% desaturation or with arousal) / hour of sleep from type I polysomnography,Calculated - Summary metric of sleep disordered breathing events.,numeric,events per hour,"",ahi_c0h4a;cahi_c0uh3x4r;cahi_ca0uhp3x4r,60 * (hremba4 + hroa4 + hnrba4 + hnroa4 + urbpa4 + uropa4 + unrbpa4 + unropa4 + carbp + carop + canbp + canop) / ttldursp,"",""
Sleep Monitoring/Polysomnography,cahi_ca0uhp3x4u_f1t1,Central Apnea-Hypopnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with > 4% desaturation and with or without arousal) / hour of sleep from type I polysomnography,"Calculated - Summary metric of sleep disordered breathing events. The definition of hypopnea events is consistent with the following clinical guidelines: (1) AASM 2012 update (alternative) [Berry RB et al. 2012 (PubMed ID:23066376)](https://www.ncbi.nlm.nih.gov/pubmed/23066376), and (2) AASM 2015 (acceptable) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.].
[Search for all AHI variables consistent with the same clinical guidelines within this dataset](https://sleepdata.org/datasets/abc/variables?search=aasm15_acceptable)",numeric,events per hour,"",ahi_c0h4;cahi_c0uh3x4u;cahi_ca0uhp3x4u;aasm15_acceptable,60 * (hrembp4 + hrop4 + hnrbp4 + hnrop4 + urbp4 + urop4 + unrbp4 + unrop4 + carbp + carop + canbp + canop) / ttldursp,"",""
Sleep Monitoring/Polysomnography,cai_ca0u_f1t1,Central Apnea Index: (Central apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography,Calculated - Summary metric of sleep disordered breathing events.,numeric,events per hour,"",cai_c0;cai_ca0u,60 * (carbp + carop + canbp + canop) / ttldursp,"",""
Sleep Monitoring/Polysomnography,hi_hp3x0u_f1t1,Hypopnea Index: (hypopneas with > 30% flow reduction and with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography,Calculated - Summary metric of sleep disordered breathing events.,numeric,events per hour,"",hi_h0;hi_h3x0u;hi_hp3x0u,60 * (hrembp + hrop + hnrbp + hnrop + urbp + urop + unrbp + unrop) / ttldursp,"",""
Sleep Monitoring/Polysomnography,minlvlsa_f1t1,Minimum oxygen saturation level in total sleep duration from type I polysomnography,"",numeric,percent (%),"",minsat;minlvlsa,"","",""
Sleep Monitoring/Polysomnography,oahi_oa0uhp3x3r_f1t1,Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography,"Calculated - Summary metric of sleep disordered breathing events. The definition for hypopneas is consistent with the following clinical guidelines: (1) American Academy of Sleep Medicine (AASM) 2007 Manual (2012 update) (recommended). [Berry RB et al. 2012 (PubMed ID:23066376)](https://www.ncbi.nlm.nih.gov/pubmed/23066376), and (2) American Academy of Sleep Medicine (AASM) 2015 (recommended) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.]
[Search for all AHI variables consistent with the same clinical guidelines within this dataset](https://sleepdata.org/datasets/abc/variables?search=aasm15_recommended)",numeric,events per hour,"",ahi_o0h3a;oahi_o0uh3x3r;oahi_oa0uhp3x3r;aasm15_recommended,60 * (hremba3 + hroa3 + hnrba3 + hnroa3 + urbpa3 + uropa3 + unrbpa3 + unropa3 + oarbp + oarop + oanbp + oanop) / ttldursp,"",""
Sleep Monitoring/Polysomnography,oahi_oa0uhp3x3u_f1t1,Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 3% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography,Calculated - Summary metric of sleep disordered breathing events.,numeric,events per hour,"",ahi_o0h3;oahi_o0uh3x3u;oahi_oa0uhp3x3u,60 * (hrembp3 + hrop3 + hnrbp3 + hnrop3 + urbp3 + urop3 + unrbp3 + unrop3 + oarbp + oarop + oanbp + oanop) / ttldursp,"",""
Sleep Monitoring/Polysomnography,oahi_oa0uhp3x4r_f1t1,Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation or with arousal) / hour of sleep from type I polysomnography,Calculated - Summary metric of sleep disordered breathing events.,numeric,events per hour,"",ahi_o0h4a;oahi_o0uh3x4r;oahi_oa0uhp3x4r,60 * (hremba4 + hroa4 + hnrba4 + hnroa4 + urbpa4 + uropa4 + unrbpa4 + unropa4 + oarbp + oarop + oanbp + oanop) / ttldursp,"",""
Sleep Monitoring/Polysomnography,oahi_oa0uhp3x4u_f1t1,Obstructive Apnea-Hypopnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal + hypopneas with > 30% flow reduction and with >= 4% oxygen desaturation and with or without arousal) / hour of sleep from type I polysomnography,"Calculated - Summary metric of sleep disordered breathing events. The definition of hypopnea events is consistent with the following clinical guidelines: (1) AASM 2012 update (alternative) [Berry RB et al. 2012 (PubMed ID:23066376)](https://www.ncbi.nlm.nih.gov/pubmed/23066376), and (2) AASM 2015 (acceptable) [Berry RB et al. The AASM Manual for the Scoring of Sleep and Associated Events: Rules, Terminology and Technical Specifications, Version 2.2. American Academy of Sleep Medicine, Darien, IL, 2015.].
[Search for all AHI variables consistent with the same clinical guidelines within this dataset](https://sleepdata.org/datasets/abc/variables?search=aasm15_acceptable)",numeric,events per hour,"",ahi_o0h4;oahi_o0uh3x4u;oahi_oa0uhp3x4u;aasm15_acceptable,60 * (hrembp4 + hrop4 + hnrbp4 + hnrop4 + urbp4 + urop4 + unrbp4 + unrop4 + oarbp + oarop + oanbp + oanop) / ttldursp,"",""
Sleep Monitoring/Polysomnography,oai_oa0u_f1t1,Obstructive Apnea Index: (Obstructive apneas with no oxygen desaturation threshold used and with or without arousal) / hour of sleep from type I polysomnography,Calculated - Summary metric of sleep disordered breathing events.,numeric,events per hour,"",oai_o0;oai_o0u;oai_oa0u,60 * (oarbp + oarop + oanbp + oanop) / ttldursp,"",""
Sleep Monitoring/Polysomnography,pctdursp_s1_f1t1,Percent of total sleep duration in stage 1 sleep from type I polysomnography,"Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep, conventionally called total sleep time.",numeric,percent (%),"",timest1p;slppctn1;pctdursp_s1,"","",""
Sleep Monitoring/Polysomnography,pctdursp_s2_f1t1,Percent of total sleep duration in stage 2 sleep from type I polysomnography,"Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep, conventionally called total sleep time.",numeric,percent (%),"",timest2p;slppctn2;pctdursp_s2,"","",""
Sleep Monitoring/Polysomnography,pctdursp_s3_f1t1,Percent of total sleep duration in stage 3 - 4 sleep from type I polysomnography,"Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep, conventionally called total sleep time.",numeric,percent (%),"",times34p;slppctn3;pctdursp_s3,"","",""
Sleep Monitoring/Polysomnography,pctdursp_salt75_f1t1,Percent of total sleep duration with oxygen saturation < 75% from type I polysomnography,"Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep, conventionally called total sleep time.",numeric,percent (%),"",pctlt75;slppcto2lt75;pctdursp_o75,"","",""
Sleep Monitoring/Polysomnography,pctdursp_salt80_f1t1,Percent of total sleep duration with oxygen saturation < 80% from type I polysomnography,"Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep, conventionally called total sleep time.",numeric,percent (%),"",pctlt80;slppcto2lt80;pctdursp_o80,"","",""
Sleep Monitoring/Polysomnography,pctdursp_salt85_f1t1,Percent of total sleep duration with oxygen saturation < 85% from type I polysomnography,"Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep, conventionally called total sleep time.",numeric,percent (%),"",pctlt85;slppcto2lt85;pctdursp_o85,"","",""
Sleep Monitoring/Polysomnography,pctdursp_salt90_f1t1,Percent of total sleep duration with oxygen saturation < 90% from type I polysomnography,"Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep, conventionally called total sleep time.",numeric,percent (%),"",pctlt90;slppcto2lt90;pctdursp_o90,"",true,""
Sleep Monitoring/Polysomnography,pctdursp_sr_f1t1,Percent of sleep time in REM sleep from type I polysomnography,"",numeric,percent (%),"",timeremp;slppctrem;pctdursp_sr,"","",""
Sleep Monitoring/Polysomnography,ttldursp_f1t1,Total sleep duration from type I polysomnography,"Sleep duration is the interval between sleep onset time and lights on/out-bed time while asleep, conventionally called total sleep time",numeric,minutes,"",slpprdp;ttldursp,"",true,""
Sleep Monitoring/Polysomnography,ttldursp_s1_f1t1,Total sleep duration in stage 1 sleep from type I polysomnography,"",numeric,minutes,"",timest1;slptimen1;ttldursp_s1,"","",""
Sleep Monitoring/Polysomnography,ttldursp_s2_f1t1,Total sleep duration in stage 2 sleep from type I polysomnography,"",numeric,minutes,"",timest2;slptimen2;ttldursp_s2,"","",""
Sleep Monitoring/Polysomnography,ttldursp_s3_f1t1,Total sleep duration in stage 3 - 4 sleep from type I polysomnography,"",numeric,minutes,"",timest34;slptimen34;ttldursp_s3,"","",""
Sleep Monitoring/Polysomnography,ttldursp_sr_f1t1,Total sleep duration in REM sleep from type I polysomnography,"",numeric,minutes,"",timerem;slptimerem;ttldursp_sr,"","",""
Sleep Questionnaires/Hypersomnia/Epworth Sleepiness Scale (ESS),ess_1sitread,Epworth Sleepiness Scale: Chance of dozing while sitting and reading,Item from the Epworth Sleepiness Scale [Johns MW 1991 (PubMed ID: 1798888)](https://www.ncbi.nlm.nih.gov/pubmed/1798888)
[Search for all ESS variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=epworth),choices,"",epworth,epworth;ess_1sitread,"","",""
Sleep Questionnaires/Hypersomnia/Epworth Sleepiness Scale (ESS),ess_2watchingtv,Epworth Sleepiness Scale: Chance of dozing while watching TV,Item from the Epworth Sleepiness Scale [Johns MW 1991 (PubMed ID: 1798888)](https://www.ncbi.nlm.nih.gov/pubmed/1798888)
[Search for all ESS variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=epworth),choices,"",epworth,epworth;ess_2watchingtv,"","",""
Sleep Questionnaires/Hypersomnia/Epworth Sleepiness Scale (ESS),ess_3sitinactive,"Epworth Sleepiness Scale: Chance of dozing while sitting, inactive in a public place",Item from the Epworth Sleepiness Scale [Johns MW 1991 (PubMed ID: 1798888)](https://www.ncbi.nlm.nih.gov/pubmed/1798888)
[Search for all ESS variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=epworth),choices,"",epworth,epworth;ess_3sitinactive,"","",""
Sleep Questionnaires/Hypersomnia/Epworth Sleepiness Scale (ESS),ess_4passenger,Epworth Sleepiness Scale: Chance of dozing as a passenger in a car for an hour without a break,Item from the Epworth Sleepiness Scale [Johns MW 1991 (PubMed ID: 1798888)](https://www.ncbi.nlm.nih.gov/pubmed/1798888)
[Search for all ESS variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=epworth),choices,"",epworth,epworth;ess_4passenger,"","",""
Sleep Questionnaires/Hypersomnia/Epworth Sleepiness Scale (ESS),ess_5lyingdown,Epworth Sleepiness Scale: Chance of dozing while lying down in the afternoon when circumstances permit,Item from the Epworth Sleepiness Scale [Johns MW 1991 (PubMed ID: 1798888)](https://www.ncbi.nlm.nih.gov/pubmed/1798888)
[Search for all ESS variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=epworth),choices,"",epworth,epworth;ess_5lyingdown,"","",""
Sleep Questionnaires/Hypersomnia/Epworth Sleepiness Scale (ESS),ess_6sittalk,Epworth Sleepiness Scale: Chance of dozing while sitting and talking to someone,Item from the Epworth Sleepiness Scale [Johns MW 1991 (PubMed ID: 1798888)](https://www.ncbi.nlm.nih.gov/pubmed/1798888)
[Search for all ESS variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=epworth),choices,"",epworth,epworth;ess_6sittalk,"","",""
Sleep Questionnaires/Hypersomnia/Epworth Sleepiness Scale (ESS),ess_7afterlunch,Epworth Sleepiness Scale: Chance of dozing while sitting quietly after lunch without alcohol,Item from the Epworth Sleepiness Scale [Johns MW 1991 (PubMed ID: 1798888)](https://www.ncbi.nlm.nih.gov/pubmed/1798888)
[Search for all ESS variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=epworth),choices,"",epworth,epworth;ess_7afterlunch,"","",""
Sleep Questionnaires/Hypersomnia/Epworth Sleepiness Scale (ESS),ess_8stoppedcar,"Epworth Sleepiness Scale: Chance of dozing while in a car, while stopped for a few minutes in traffic",Item from the Epworth Sleepiness Scale [Johns MW 1991 (PubMed ID: 1798888)](https://www.ncbi.nlm.nih.gov/pubmed/1798888)
[Search for all ESS variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=epworth),choices,"",epworth,epworth;ess_8stoppedcar,"","",""
Sleep Questionnaires/Hypersomnia/Epworth Sleepiness Scale (ESS),ess_total,Epworth Sleepiness Scale: Total score,Calculated - Total score based on an 8-item questionnaires ranking likelihood of dozing off [Johns MW 1991 (PubMed ID: 1798888)](https://www.ncbi.nlm.nih.gov/pubmed/1798888). Scale 0-3 for individual items; 0 to 24 for overall score.
[Search for all ESS variables within this dataset](https://sleepdata.org/datasets/abc/variables?search=epworth),integer,"","",epworth,ess_1sitread + ess_2watchingtv + ess_3sitinactive + ess_4passenger + ess_5lyingdown + ess_6sittalk + ess_7afterlunch + ess_8stoppedcar,true,""