qrsaxis qrsivcd
Name
qrsdur
Label
Duration of the QRS complex
Description

duration from the end of the PR interval to the end of the S wave

Units
milliseconds
Type
numeric
Tags
.8-.12 ecg ekg ms seconds
Visit number vs Duration of the QRS complex
N Mean StdDev Median Min Max Unknown Total
Baseline 317 98.5 ± 18.6 96.0 64.0 204.0 1 318
Follow-up 294 98.6 ± 19.8 94.0 62.0 196.0 7 301
Treatment Arm vs Duration of the QRS complex
Baseline
N Mean StdDev Median Min Max Unknown Total
Total 317 98.5 ± 18.6 96.0 64.0 204.0 1 318
Healthy Lifestyles and Sleep Education - control arm (HLSE) 105 98.5 ± 19.6 96.0 76.0 204.0 1 106
Healthy Lifestyles and Sleep Education + (supplemental nocturnal) Oxygen - oxygen arm (HLSE-O) 106 98.8 ± 17.7 96.0 72.0 170.0 - 106
Healthy Lifestyles and Sleep Education + Positive airway pressure treatment - CPAP arm (HLSE-P) 106 98.2 ± 18.6 96.0 64.0 162.0 - 106
Treatment Arm vs Duration of the QRS complex
Follow-up
N Mean StdDev Median Min Max Unknown Total
Total 294 98.6 ± 19.8 94.0 62.0 196.0 7 301
Healthy Lifestyles and Sleep Education - control arm (HLSE) 99 97.3 ± 18.2 92.0 74.0 196.0 1 100
Healthy Lifestyles and Sleep Education + (supplemental nocturnal) Oxygen - oxygen arm (HLSE-O) 99 99.5 ± 19.5 94.0 74.0 186.0 2 101
Healthy Lifestyles and Sleep Education + Positive airway pressure treatment - CPAP arm (HLSE-P) 96 99.1 ± 21.7 94.0 62.0 180.0 4 100
Age category vs Duration of the QRS complex
Baseline
N Mean StdDev Median Min Max Unknown Total
Total 317 98.5 ± 18.6 96.0 64.0 204.0 1 318
45-54 years 53 97.0 ± 18.9 96.0 64.0 204.0 - 53
55-64 years 139 97.9 ± 16.9 94.0 70.0 162.0 - 139
65 years or older 125 99.8 ± 20.3 96.0 72.0 170.0 1 126
Age category vs Duration of the QRS complex
Follow-up
N Mean StdDev Median Min Max Unknown Total
Total 294 98.6 ± 19.8 94.0 62.0 196.0 6 300
45-54 years 48 97.4 ± 18.8 96.0 70.0 196.0 1 49
55-64 years 124 98.4 ± 19.1 94.0 74.0 180.0 3 127
65 years or older 122 99.3 ± 21.0 94.0 62.0 186.0 2 124
Gender vs Duration of the QRS complex
Baseline
N Mean StdDev Median Min Max Unknown Total
Total 317 98.5 ± 18.6 96.0 64.0 204.0 1 318
Female 84 93.9 ± 18.0 90.0 70.0 204.0 - 84
Male 233 100.2 ± 18.6 96.0 64.0 170.0 1 234
Gender vs Duration of the QRS complex
Follow-up
N Mean StdDev Median Min Max Unknown Total
Total 294 98.6 ± 19.8 94.0 62.0 196.0 7 301
Female 77 94.8 ± 19.8 90.0 74.0 196.0 2 79
Male 217 100.0 ± 19.7 96.0 62.0 186.0 5 222
Race vs Duration of the QRS complex
Baseline
N Mean StdDev Median Min Max Unknown Total
Total 312 98.6 ± 18.7 96.0 64.0 204.0 1 313
White 251 99.9 ± 19.8 96.0 64.0 204.0 1 252
Black 42 94.0 ± 12.8 90.0 72.0 122.0 - 42
Other 19 91.6 ± 10.5 90.0 76.0 120.0 - 19
Race vs Duration of the QRS complex
Follow-up
N Mean StdDev Median Min Max Unknown Total
Total 290 98.7 ± 19.9 94.0 62.0 196.0 6 296
White 233 99.8 ± 20.5 96.0 62.0 196.0 4 237
Black 38 96.4 ± 18.9 92.0 74.0 180.0 2 40
Other 19 89.5 ± 9.5 88.0 74.0 112.0 - 19