Table 1.
Sample characteristics
| Full sample n = 491 |
PSG sample n = 172 |
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|---|---|---|---|---|
|
| ||||
| n | % | n | % | |
|
| ||||
| Male | 213 | 43.4 | 77 | 44.8 |
| Female | 278 | 56.6 | 95 | 55.2 |
| White | 319 | 65 | 119 | 69.2 |
| Black or African American | 86 | 17.5 | 32 | 18.6 |
| Asian | 74 | 15.1 | 17 | 9.9 |
| Other | 5 | 1.02 | 1 | 0.6 |
| Undisclosed | 7 | 1.4 | 3 | 1.70 |
|
| ||||
| M | SD | M | SD | |
|
| ||||
| Age | 23.55 | 3.38 | 23.86 | 3.36 |
| CTQ total score | 31.01 | 7.98 | 29.65 | 5.37 |
| Subjective sleep measures | ||||
| PSQI total score | 2.07 | 1.42 | 1.85 | 1.12 |
| ISI total score | 1.45 | 1.67 | 1.28 | 1.32 |
| ESS total score | 3.64 | 2.55 | 3.49 | 2.15 |
| Objective sleep measures | ||||
| Sleep Latency (min) | 15.79 | 14.63 | ||
| Total sleep time (min) | 438.07 | 32.023 | ||
| Wake after sleep onset (min) | 28.28 | 23.34 | ||
| Sleep efficiency | 90.96 | 5.47 | ||
| Stage 1% | 4.95 | 2.89 | ||
| Stage 2% | 48.07 | 7.22 | ||
| Delta % | 22.08 | 7.58 | ||
| Delta ratio | 1.78 | 1.10 | ||
| NREM % | 75.11 | 4.93 | ||
| REM % | 24.89 | 4.93 | ||
| REM density* | 8.76 | 4.63 | ||
| REM fragmentation | 4.94 | 3.34 | ||
CTQ, childhood trauma questionnaire; ESS, Epworth Sleepiness Scale; ISI, Insomnia Severity Index; PSQI, Pittsburgh Sleep Quality Index.
*
n = 171 due to incomplete data.