Table 2.
Demographic and asthma severity characteristics in 58 asthmatic patients with OSA and 34 patients without OSA.
| OSA (+) | (OSA (-) | P value | |
|---|---|---|---|
| N | 58 | 34 | NS |
| Age (range, years) | 5.8 ± 1.8 (3-10) | 6.9±2.3 (4-10) | NS |
| Gender (% male) | 51.7 | 55.8 | NS |
| Ethnicity (%African American) | 32.0 | 14.7 | NS |
| BMI z score (%obese) | 1.46 ± 1.32 (38.2%) | 1.38 ± 1.24 (35.1%) | NS |
| Habitual Snoring (>3 nights/week) | 49 | 14 | <0.0001 |
| Acute Asthma Exacerbations (/year) | 3.57 ± 1.37 | 3.12 ± 1.40 | <0.05 |
| Weekly β-agonist rescue use (/week) | 4.7± 2.9 | 3.6± 2.1 | <0.04 |
| Asthma Symptom Score | 2.93± 1.93 | 2.1± 1.65 | <0.04 |
| FEV1 (%predicted) | 82.1± 7.1* | 87.9± 6.4** | NS |
| Allergic Rhinitis (n) | 46 | 26 | NS |
| TST (min) | 476.4±25.2 | 472.8±32.3 | NS |
| REM (%TST) | 21.1±6.3 | 23.8±7.1 | NS |
| Stage 1 (%TST) | 16.4±5.2 | 11.0±4.4 | <0.05 |
| Stage 2 (%TST) | 47.7±15.1 | 44.3±14.7 | NS |
| SWS (%TST) | 15.2±9.4 | 21.8±25 | <0.01 |
| OAHI (hr TST) | 14.6±8.2 | 0.8±01.2 | <0.0001 |
| Nadir SaO2 (%) | 84.5±2.7 | 91.5±1.4 | <0.0001 |
| Arousal Index (/hrTST) | 18.7±7.3 | 11.3±6.2 | <0.0001 |
*
- n=28;
**
- n=17
SWS – slow wave sleep; REM – rapid eye movement sleep; TST – total sleep time; OAHI – obstructive apnea hypopnea index,