Table 2.
Characteristics and Environmental Exposures Associated With Sleep (n = 51,562), California Teachers Study Cohort, California, United States, 2012–2015
| Sleep Duration <7 Hours | Sleep Latency >15 Minutes | |||
|---|---|---|---|---|
| Characteristic | Age-Adjusted OR | 95% CI | Age-Adjusted OR | 95% CI |
| Light at night, 5 mcd/m2 | 1.35 | 1.29, 1.41 | 1.02 | 0.98, 1.07 |
| Noise, 10 dB | 1.03 | 0.98, 1.08 | 1.05 | 1.01, 1.10 |
| Green space, 0.1 EVI units | 0.16 | 0.11, 0.22 | 0.57 | 0.43, 0.76 |
| PM2.5 air pollution, 5 μg/m3 | 1.13 | 1.10, 1.16 | 1.04 | 1.01, 1.06 |
| Chronotype | ||||
| Early | 1.00 | Referent | 1.00 | Referent |
| More early | 0.79 | 0.74, 0.84 | 1.13 | 1.07, 1.19 |
| Neither | 0.87 | 0.82, 0.93 | 1.24 | 1.17, 1.31 |
| More late | 0.84 | 0.79, 0.90 | 1.48 | 1.40, 1.56 |
| Late | 1.22 | 1.15, 1.29 | 1.65 | 1.56, 1.74 |
| Race/ethnicity, non-Hispanic White vs. other | 2.08 | 1.96, 2.19 | 1.15 | 1.09, 1.21 |
| Self-reported use of sleep medication, never vs. ever | 1.55 | 1.59, 1.62 | 2.82 | 2.71, 2.94 |
| Self-reported trouble sleeping, never vs. ever | 2.79 | 2.64, 2.96 | 4.25 | 4.06, 4.46 |
Abbreviations: CI, confidence interval; dB, decibel; EVI, enhanced vegetation index; mcd, millicandela; OR, odds ratio; PM2.5, particulate matter with an aerodynamic diameter ≤2.5 μm.