Table 3.

Outcome of sleep apnea (apnea–hypopnea index > 15 on polysomnography)^*

	Model 1	Model 2	Model 3
One-year	n = 1,961	n = 1,884	n = 1,884
NO2, per 10 ppb	1.05 (0.95–1.16)	1.00 (0.88–1.14)	1.39 (1.03–1.87)†
Five-year	n = 1,948	n = 1,871	n = 1,871
NO2, per 10 ppb	1.06 (0.96–1.17)	1.01 (0.89–1.15)	1.41 (1.04–1.92)†

Definition of abbreviation: NO₂ = nitrogen dioxide.

NO₂ average exposure estimates (in 10 ppb units), over 1–5 years before sleep assessment, presented as odds ratios (95% confidence interval).

^*Adjusting for age, sex, body mass index (model 1); plus diabetes, hypertension, race/ethnicity, household income, smoking status, and residential socioeconomic status (model 2); plus site (model 3).

^†P < 0.05.