Table 5 Results of analysis of covariance for components and global score of the Pittsburgh Sleep Quality Index and logistic regression for “poor sleepers” (global score >5).
| Component | Exposure category (mW/m2) | p value | ||
|---|---|---|---|---|
| <0.1 | 0.1−0.5 | >0.5 | ||
| Subjective sleep quality | 0.71 (0.79) | 0.60 (0.77) | 1.00 (0.89) | 0.240 |
| Sleep latency | 0.76 (0.93) | 0.74 (0.95) | 0.94 (0.98) | 0.295 |
| Sleep duration | 1.06 (0.98) | 1.14 (1.03) | 1.21 (1.09) | 0.504 |
| Habitual sleep efficiency | 0.54 (0.92) | 0.70 (0.98) | 0.74 (1.15) | 0.061 |
| Sleep disturbances | 0.92 (0.58) | 0.91 (0.66) | 0.91 (0.62) | 0.338 |
| Daytime dysfunction | 0.66 (0.75) | 0.54 (0.70) | 0.82 (0.90) | 0.099 |
| Sleep medication | 0.10 (0.46) | 0.17 (0.71) | 0.21 (0.73) | 0.216 |
| Global score | 4.74 (3.52) | 4.78 (3.86) | 5.87 (4.21) | 0.282 |
| Poor sleepers (%) | 35% | 31% | 41% | 0.225 |
Results expressed as mean (SD).
p values for exposure factor are shown.