Table 2. Associations of sleep quality with various electromagnetic exposures.
| Variables | Sleep Quality | Crude | Adjusteda | ||||
| Poor, N (%) | Good, N (%) | OR (95%CI) | P Value | OR (95%CI) | P Value | ||
| Daily Occupational Exposure Time (hours)b | T1 | 150 (28.2) | 132 (40.9) | 1.00 | --- | 1.00 | --- |
| T2 | 194 (36.5) | 94 (29.1) | 1.82 (1.29, 2.55) | <0.001 | 1.68 (1.18, 2.39) | 0.004 | |
| T3 | 187 (35.2) | 97 (30.0) | 1.70 (1.21, 2.38) | 0.002 | 1.57 (1.10, 2.24) | 0.012 | |
| Occupational Exposure Duration (years) | <23 | 270 (50.8) | 177 (54.8) | 1.00 | --- | 1.00 | --- |
| ≥23 | 261 (49.2) | 146 (45.2) | 1.17 (0.89, 1.55) | 0.262 | 1.26 (0.91, 1.76) | 0.167 | |
| Electric fee (yuan/month) | <150 | 207 (39.0) | 129 (39.9) | 1.00 | --- | 1.00 | --- |
| ≥150 | 324 (61.0) | 194 (60.1) | 1.04 (0.78, 1.38) | 0.782 | 1.04 (0.78, 1.39) | 0.790 | |
| Mobile-phone service (years) | <12 | 242 (45.6) | 144 (44.6) | 1.00 | --- | 1.00 | --- |
| ≥12 | 289 (54.4) | 179 (55.4) | 0.96 (0.73, 1.27) | 0.778 | 1.00 (0.75, 1.34) | 0.982 | |
a
Adjusted for age, gender, cigarette smoking, tea drinking, BMI, and work pressure.
b
The cut points of tertiles of daily occupational exposure time (DOET) were ≤1.5 hours/day for T1, 1.5< DOET ≤4 hours/day for T2, and >4 hours/day for T3.