Related Variables

id	Id Record ID	Administrative
psqi_4	Pittsburgh Sleep Quality Index: Hours of actual sleep at night the past month Item from Pittsburgh Sleep Quality Index. Buysse et. al 1989 (PubMed ID: 2748771) External semantic reference: CDE Original text: The following questions relate to your usual sleep habits during the past month only. Your answers should indicate the most accurate reply for the majority of days and nights in the past month. During the past month, how many hours of actual sleep did you get at night (this may be different than the number of hours you spend in bed)? Search for all PSQI variables within this dataset	Sleep Questionnaires/Sleep Habits/Pittsburgh Sleep Quality Index (PSQI)
psqi_total	Pittsburgh Sleep Quality Index: Total (Global) Score Summary score for the Pittsburgh Sleep Quality Index. Buysse et. al 1989 (PubMed ID: 2748771) Seven component scores are derived, from 0 (no difficulty) to 3 (severe difficulty). The global score is the sum of the seven components (0 to 21), while higher scores indicate worse sleep quality. External semantic reference: CDE Search for all PSQI variables within this dataset	Sleep Questionnaires/Sleep Habits/Pittsburgh Sleep Quality Index (PSQI)

Assessing Nocturnal Sleep/Wake Effects on Risk of Suicide