Name

qrsaxis

Label

QRS Axis

Description

Average direction of electrical activity during the QRS complex

Units
degrees
Type
numeric
Visit number vs QRS Axis
N Mean StdDev Median Min Max Unknown Total
Baseline 224 28.9 ± 25.3 25.0 0.0 128.0 94 318
Follow-up 203 29.8 ± 25.9 25.0 0.0 175.0 98 301
Treatment Arm vs QRS Axis
Baseline
N Mean StdDev Median Min Max Unknown Total
Total 224 28.9 ± 25.3 25.0 0.0 128.0 94 318
Healthy Lifestyles and Sleep Education - control arm (HLSE) 73 28.7 ± 21.8 25.0 0.0 118.0 33 106
Healthy Lifestyles and Sleep Education + (supplemental nocturnal) Oxygen - oxygen arm (HLSE-O) 68 24.4 ± 25.5 20.0 0.0 128.0 38 106
Healthy Lifestyles and Sleep Education + Positive airway pressure treatment - CPAP arm (HLSE-P) 83 32.7 ± 27.5 26.0 0.0 128.0 23 106
Treatment Arm vs QRS Axis
Follow-up
N Mean StdDev Median Min Max Unknown Total
Total 203 29.8 ± 25.9 25.0 0.0 175.0 98 301
Healthy Lifestyles and Sleep Education - control arm (HLSE) 70 28.6 ± 20.5 30.0 0.0 97.0 30 100
Healthy Lifestyles and Sleep Education + (supplemental nocturnal) Oxygen - oxygen arm (HLSE-O) 63 27.3 ± 32.0 17.0 0.0 175.0 38 101
Healthy Lifestyles and Sleep Education + Positive airway pressure treatment - CPAP arm (HLSE-P) 70 33.2 ± 24.7 32.0 0.0 120.0 30 100
Age category vs QRS Axis
Baseline
N Mean StdDev Median Min Max Unknown Total
Total 224 28.9 ± 25.3 25.0 0.0 128.0 94 318
45-54 years 42 31.9 ± 26.1 29.0 0.0 128.0 11 53
55-64 years 99 30.5 ± 26.2 24.0 0.0 128.0 40 139
65 years or older 83 25.4 ± 23.5 24.0 0.0 125.0 43 126
Age category vs QRS Axis
Follow-up
N Mean StdDev Median Min Max Unknown Total
Total 203 29.8 ± 25.9 25.0 0.0 175.0 97 300
45-54 years 36 29.6 ± 14.1 33.5 5.0 58.0 13 49
55-64 years 88 29.6 ± 26.1 24.0 0.0 120.0 39 127
65 years or older 79 30.1 ± 29.9 22.0 0.0 175.0 45 124
Gender vs QRS Axis
Baseline
N Mean StdDev Median Min Max Unknown Total
Total 224 28.9 ± 25.3 25.0 0.0 128.0 94 318
Female 64 29.0 ± 23.4 24.5 0.0 120.0 20 84
Male 160 28.8 ± 26.0 25.0 0.0 128.0 74 234
Gender vs QRS Axis
Follow-up
N Mean StdDev Median Min Max Unknown Total
Total 203 29.8 ± 25.9 25.0 0.0 175.0 98 301
Female 59 28.9 ± 23.4 23.0 0.0 120.0 20 79
Male 144 30.1 ± 26.9 25.5 0.0 175.0 78 222
Race vs QRS Axis
Baseline
N Mean StdDev Median Min Max Unknown Total
Total 222 29.0 ± 25.4 25.0 0.0 128.0 91 313
White 175 28.2 ± 26.0 24.0 0.0 128.0 77 252
Black 32 30.0 ± 23.5 28.5 0.0 120.0 10 42
Other 15 35.4 ± 21.4 39.0 0.0 71.0 4 19
Race vs QRS Axis
Follow-up
N Mean StdDev Median Min Max Unknown Total
Total 200 29.9 ± 26.0 25.0 0.0 175.0 96 296
White 158 29.1 ± 27.0 22.0 0.0 175.0 79 237
Black 28 32.1 ± 23.3 30.0 0.0 120.0 12 40
Other 14 35.0 ± 19.2 36.0 5.0 65.0 5 19