Table 1.
Demographic and clinical data.
| Measurements | IS (N = 30) | NIS (N = 62) | t | p-value |
|---|---|---|---|---|
| Age (years) | 38.00 ± 11.85 | 37.47 ± 11.95 | 0.201 | 0.841a |
| Gender (M/F) | 15/15 | 26/36 | 0.532 | 0.466b |
| Education level (years) | 14.07 ± 3.34 | 15.42 ± 2.95 | −1.889 | 0.065a |
| Handedness (R/L) | 30/0 | 62/0 | - | - |
| HAMD score | 2.93 ± 1.46 | 0.19 ± 0.51 | 9.987 | <0.001a |
| Adjusted HAMD score | 1.23 ± 1.31 | 0.19 ± 0.51 | 4.214 | <0.001a |
| HAMA score | 3.20 ± 2.12 | 0.32 ± 0.79 | 7.187 | <0.001a |
| Adjusted HAMA score | 1.97 ± 2.00 | 0.32 ± 0.79 | 4.327 | <0.001a |
| Insomnia score | 1.70 ± 0.92 | 0.00 ± 0.00 | 10.172 | <0.001a |
Data are presented as mean ± SD. Adjusted HAMD score means HAMD scores after omission of sleep questions. Adjusted HAMA score means HAMA scores after omission of sleep questions. M, male; F, female; R, right; L, left; IS, healthy subjects with insomnia symptoms; NIS, healthy subjects without insomnia symptoms; SD, standard deviation; HAMD, Hamilton Depression Rating Scale; HAMA, Hamilton Anxiety Rating Scale. aThe p value was obtained by two sample t-tests. bThe p value for gender distribution in the two groups was obtained by chi-square test.