Table 3.
Poisson regression estimates evaluating the association between nonadherence at 6 months and baseline characteristics (complete case analysis, n = 44).
| Predictor | Unadjusted Analysis | Adjusted Analysisa | Ridge Regressiona | ||
|---|---|---|---|---|---|
| RR | 95% CI | RR | 95% CI | RR | |
| Demographics | |||||
| Age (y) | 1.18 | 1.04–1.35 | 1.18 | 1.02–1.36 | 1.03 |
| Male sex | 1.56 | 0.61–3.97 | 0.96 | 0.37–2.48 | 1.06 |
| SDB diagnosis | |||||
| Hypoventilation/CSA (reference) | 1.00 | – | 1.00 | – | 1.00 |
| Mixed diagnosis | 0.91 | 0.51–1.60 | 0.53 | 0.13–2.28 | 1.05 |
| OSA | 0.54 | 0.29–0.99 | 0.87 | 0.23–3.20 | 0.90 |
| PAP mode | |||||
| CPAP (reference) | 1.00 | – | 1.00 | – | 1.00 |
| BPAP | 2.29 | 1.07–4.92 | 3.42 | 1.17–9.98 | 1.15 |
| Auto-PAP | 1.50 | 0.60–3.74 | 2.34 | 0.79–6.98 | 0.99 |
| Comorbidities | |||||
| Developmental delay | 0.91 | 0.33–2.52 | 0.79 | 0.35–1.78 | 0.98 |
| Obesity | 0.67 | 0.40–1.10 | 0.52 | 0.22–1.25 | 0.89 |
| Asthma | 0.49 | 0.18–1.30 | 0.89 | 0.31–2.58 | 0.88 |
| Mental health disorder | 1.27 | 0.67–2.41 | 1.10 | 0.38–3.18 | 1.03 |
| Behavioral disorder | 1.06 | 0.52–2.14 | 0.91 | 0.47–1.73 | 0.99 |
| PSG indices | |||||
| AHI (events/h) | 1.00 | 0.99–1.01 | 1.00 | 0.99–1.01 | 1.00 |
| O2 saturation nadir (%) | 1.04 | 1.00–1.08 | 1.05 | 1.00–1.10 | 1.01 |
| Maximum CO2 (mm Hg) | 0.98 | 0.94–1.03 | 0.99 | 0.93–1.04 | 1.00 |
| Sleep efficiency (%) | 0.98 | 0.97–1.00 | 1.00 | 0.98–1.02 | 1.00 |
| Arousal index (events/h) | 0.99 | 0.95–1.03 | 0.97 | 0.94–1.02 | 1.00 |
| Self-reported sleep symptoms | |||||
| Daytime somnolence (monthly or never) | 0.79 | 0.41–1.54 | 0.86 | 0.25–2.92 | 0.96 |
| Daytime energy (good or excellent) | 1.02 | 0.59–1.74 | 1.01 | 0.56–1.83 | 1.01 |
| Headache frequency (≥3 d/wk) | 1.18 | 0.64–2.20 | 1.06 | 0.50–2.24 | 1.03 |
aThe reported relative risks in this column are adjusted for all other predictors described in this table. AHI = apnea-hypopnea index, auto-PAP = auto-titrating positive airway pressure, BPAP = bilevel positive airway pressure, CI = confidence interval, CPAP = continuous positive airway pressure, CSA = central sleep apnea, OSA = obstructive sleep apnea, PAP = positive airway pressure, PSG = polysomnography, RR = relative risk, SDB = sleep-disordered breathing.