Table 2.
Group means and standard deviations for all independent and dependent variables. Participants were judged to meet DSM-5 criteria for insomnia if they had at least one problem “usually” or “always” for at least three months, three nights per week, and with at least “somewhat” interference.
| Insomnia Group (n = 305) | No Insomnia Group (n = 1945) | p-value | |
|---|---|---|---|
| Sex, n (%) | < .001 | ||
| Male | 103 (33.8) | 903 (46.4) | |
| Female | 202 (66.2) | 1042 (53.6) | |
| Age, mean (SD) | 23.27 (2.92) | 23.08 (2.98) | 0.43 |
| Sleep Disturbance, mean (SD) | |||
| weekday TST (min) | 366.73 (92.47) | 452.28 (417.60) | < .001 |
| sleep latency (min) | 77.31 (56.60) | 33.65 (40.96) | < .001 |
| nocturnal awakenings | 3.44 (5.39) | 1.67 (2.87) | < .001 |
| back to sleep latency (min) | 32.70 (42.86) | 14.49 (26.81) | < .001 |
| symptom duration (months) | 53.80 (57.10) | 32.37 (50.70) | < .001 |
| symptom frequency (days/week) | 4.91 (1.32) | 2.10 (1.64) | < .001 |
| FIRST, mean (SD) | 23.86 (4.99) | 18.71 (5.23) | < .001 |
| CES-D, mean (SD) | 18.75 (10.25) | 9.82 (7.69) | < .001 |