Table 1.
Descriptive characteristics of the datasets
| Characteristics |
SHHS 1
(n = 4123) |
WSC
(n = 1120) |
|
|---|---|---|---|
| Training (n = 2886) |
Testing (n = 1237) |
Independent Testing (n = 1120) |
|
| * BMI (kg/m2) | |||
| < 21 | 4.33% | 3.31% | 2.06% |
| 21 – 24.9 | 24.12% | 20.13% | 12.05% |
| 25 – 29.9 | 42.83% | 40.34% | 35.00% |
| 30 – 35 | 20.20% | 24.66% | 24.55% |
| > 35 | 8.52% | 11.56% | 26.34% |
| * Female (%) | 49.72 | 49.23 | 45.89 |
| Neck girth (mean±SD cm) | 37.98±4.28 | 38.11±4.15 | 38.86±4.17 |
| * Snoring loudness | |||
| 1. Not snoring/Don’t know | 29.00% | 23.04% | 27.23% |
| 2. Slightly louder than heavy breathing | 17.33% | 19.89% | 17.68% |
| 3. As loud as talking | 30.70% | 30.07% | 27.59% |
| 4. Louder than talking | 14.00% | 16.73% | 14.82% |
| 5. Extremely loud | 8.97% | 10.27% | 12.68% |
| * Hypertension: Yes | 42.89% | 38.23% | 32.86% |
| * Age (mean±SD years) | 64.68±11.29 | 60.18±8.32 | 56.42±8.13 |
| * Tiredness | |||
| 1. Never feel excessive daytime sleepiness | 14.38% | 16.57% | 15.54% |
| 2. Once a month feel excessive daytime sleepiness | 39.81% | 40.26% | 38.39% |
| 3. 2–4 times a month feel excessive daytime sleepiness | 32.47% | 31.29% | 29.55% |
| 4. 5–15 times a month feel excessive daytime sleepiness | 11.30% | 9.21% | 13.13% |
| 5. 16–30 times a month feel excessive daytime sleepiness | 2.04% | 2.67% | 3.39% |
| * Observed apnea: Yes | 13.48% | 11.96% | 11.43% |
| * Snoring frequency | |||
| 1. Never or rarely - only once or a few times ever | 15.65% | 9.84% | 15.72% |
| 2. Sometimes - a few nights per month | 12.37% | 12.21% | 19.82% |
| 3. At least once a week, but pattern may be irregular | 16.81% | 18.59% | 11.96% |
| 4. Several (3 to 5) nights per week | 15.18% | 15.54% | 15.36% |
| 5. Every night or almost every night | 21.73% | 24.98% | 27.14% |
| 9. Do not know | 18.26% | 18.84% | 10.00% |
| * Blood pressure | |||
| Systolic / Diastolic blood pressure | |||
| < 140 and < 90 mmHg | 72.07% | 82.78% | 74.11% |
| 140 – 160 or 90 – 100 mmHg | 22.87% | 14.23% | 23.21% |
| 160 – 180 or 100 – 110 mmHg | 4.30% | 2.59% | 2.59% |
| ≥ 180 or ≥ 110 mmHg | 0.76% | 0.40% | 0.09% |
| * Chace of dozing off or fall asleep while driving | |||
| 1: No chance | 82.57% | 85.24% | 86.16% |
| 2: Slight chance | 14.92% | 12.17% | 11.07% |
| 3: Moderate chance | 1.98% | 1.78% | 2.59% |
| 4: High chance | 0.52% | 0.81% | 0.18% |
| * ESS score: ≥ 11 | 27.06% | 25.55% | 34.11% |
| * AHI label | |||
| 0: Low risk | 52.84% | 54.81% | 51.07% |
| 1: High risk | 47.16% | 45.19% | 48.93% |
AHI: apnea hypopnea index; BMI: body mass index; ESS: Epworth sleepiness scale; SHHS1: sleep heart health study visit one; SD: standard deviation; WSC: Wisconsin sleep cohort.
*
indicates the significant difference between the SHHS1 testing and the WSC sets. Differences were considered significant at p-value < 0.05 and effect size > 0.3.