Table 1.
Frequency (%) or Mean (95% CI) for Demographic and Sleep Variables According to Severity of Upper Airway Obstruction (Intermittent Snorer, Habitual Snorer and OSAS) with Chi-Square and F-Test Results
| Demographic/Sleep variable | Severity of Upper Airway Obstruction |
||||||
|---|---|---|---|---|---|---|---|
| Intermittent Snorer (n=80) |
Habitual Snorer (n = 68) |
OSAS (n= 42) |
Chi-square | ||||
| n | % | n | % | n | % | ||
| Gender (male) | 43 | (54%) | 40 | (59%) | 23 | (55%) | 0.47 |
| Parental snoring | 52 | (65%) | 44 | (65%) | 26 | (62%) | 0.07 |
| Smoking in home | 23 | (29%) | 22 | (32%) | 12 | (29%) | 0.28 |
| mean | 95% CI | mean | 95% CI | mean | 95% CI | F-test | |
| BMI z-score | 0.63 | 0.40–0.86 | 0.67 | 0.42–0.92 | 1.26 | 0.87–1.61 | 5.07** |
| Age | 7.20 | 6.66–7.74 | 6.54 | 5.88–7.20 | 6.93 | 6.11–7.74 | 1.20 |
| Socioeconomic status | 991 | 971–1011 | 972 | 955–989 | 958 | 932–983 | 2.52 |
| Total sleep time (min) | 439 | 430–448 | 426 | 414–437 | 422 | 405–437 | 2.67 |
| Stage 1% | 3.26 | 2.80–3.72 | 3.83 | 3.22–4.44 | 4.17 | 3.22–5.14 | 2.13 |
| Stage 2% | 45.2 | 43.8–46.6 | 45.4 | 43.8–47.1 | 43.0 | 41.3–45.2 | 1.62 |
| SWS (3+4)% | 30.6 | 29.1–31.8 | 30.6 | 29.0–32.3 | 31.6 | 29.6–33.3 | 0.33 |
| REM% | 20.9 | 19.9–22.0 | 20.1 | 18.9–21.3 | 21.1 | 19.8–22.5 | 0.85 |
| REM latency (min) | 103 | 92–115 | 112 | 98–127 | 122 | 106–138 | 1.70 |
| OAHI | 0.14 | 0.09–0.19 | 0.18 | 0.13–0.23 | 5.35 | 3.75–7.00 | 75.4**** |
| OAHI-transformeda | 0.91 | 0.88–0.94 | 0.88 | 0.84–0.90 | 0.25 | 0.20–0.29 | 353**** |
| CAI | 0.53 | 0.38–0.67 | 1.14 | 0.46–1.81 | 1.96 | 0.86–3.06 | 4.94** |
| CAI-transformeda | 0.74 | 0.69–0.78 | 0.66 | 0.60–0.72 | 0.54 | 0.45–0.61 | 10.6**** |
| Spontaneous Arousal Index | 6.71 | 5.92–7.50 | 7.81 | 6.77–8.85 | 8.25 | 6.57–9.93 | 2.1 |
| Respiratory Arousal Index | 0.89 | 0.62–1.16 | 1.36 | 0.96–1.77 | 6.44 | 4.14–8.75 | 34.5**** |
| SpO2 nadir | 93.0 | 92.3–93.8 | 92.3 | 91.5–93.1 | 88.0 | 86.1–89.6 | 24.6**** |
NB *denotes p < 0.05, **p < 0.01, ***p < 0.005 and ****p < 0.001. aResults for inverse functions indicate the opposite direction of actual severity, i.e., a smaller value indicates greater raw value and severity. OSAS = obstructive sleep apnea syndrome. Stage 1,2, SWS (stage 3+4 slow wave sleep) and REM sleep are presented as a percentage of total sleep time.