Table 1
Characteristics of PER3(4/4), PER3(4/5), PER3(5/5) and PER3(–/5) Descriptive Variables.
| Characteristic | Per 3 4/4 | Per 3 4/5 | Per 3 5/5 | Per 3 –/5 Combined | ||||
|---|---|---|---|---|---|---|---|---|
| Means | SD | Means | SD | Means | SD | Means | SD | |
| N | 88 | 98 | 19 | 117 | ||||
| Age | 21.10 | 3.85 | 21.14 | 4.59 | 21.00 | 4.67 | 21.12 | 4.58 |
| Ave Hours Sleep | 6.72 | 1.42 | 6.67 | 1.38 | 6.47 | 1.26 | 6.64 | 1.35 |
| Anxiety-State | 41.78 | 13.60 | 40.71 | 13.34 | 38.05 | 10.80 | 40.28 | 12.96 |
| Anxiety-Trait | 40.05 | 11.65 | 40.95 | 10.90 | 40.00 | 8.32 | 40.79 | 10.50 |
| PSQI Total score | 6.18 | 2.74 | 6.44 | 3.03 | 6.16 | 3.08 | 6.39 | 3.03 |
| POMS Depression | 7.16 | 9.57 | 6.84 | 8.92 | 5.89 | 7.84 | 6.68 | 8.73 |
| POMS Anger | 5.19 | 6.00 | 3.93 | 5.47 | 5.26 | 6.35 | 4.15 | 5.61 |
| POMS Tension | 8.98 | 7.42 | 8.80 | 7.39 | 7.95 | 6.45 | 8.66 | 7.22 |
| POMS Vigor | 11.48 | 7.35 | 11.48 | 6.32 | 9.79 | 6.53 | 11.21 | 6.36 |
| POMS Confusion | 7.02 | 4.71 | 6.69 | 4.58 | 5.79 | 4.93 | 6.55 | 4.63 |
| POMS Fatigue | 9.10 | 6.72 | 8.26 | 6.49 | 8.84 | 6.15 | 8.35 | 6.42 |
| POMS Mood Score | 25.98 | 30.82 | 22.95 | 28.59 | 23.95 | 29.68 | 23.11 | 28.65 |
| Depression CES-D | 14.61 | 9.71 | 14.18 | 8.71 | 10.94 | 7.20 | 13.68 | 8.54 |
Note. *PER3(–/5) Combined collapses PER3(4/5) and PER3(5/5).
Figure 1
Relationship between sleep duration and mood impairment among PER3 groups. A main effect of sleep duration and total mood disturbance (POMS) was revealed (F (1,204) = 5.41, p = 0.02). A main effect of state anxiety (STAI-State) and sleep duration was also found (F (1,204) = 7.32, p = 0.007). There was no significant main effect of PER3 genotype alone on either the POMS or STAI measures (p’s > 0.05). Additionally, a significant interaction between PER3 genotype and sleep duration on the POMS scale (F (1,204) = 4.96, p = 0.03), and PER3 genotype and sleep duration on the state anxiety score (F (1,204) = 4.07, p = 0.04) was discovered. Neither depressive symptomatology (CES-D) nor trait anxiety (STAI-Trait) scores showed significant main effects of genotype or sleep duration or significant interaction effects (all p’s > 0.05). Values reflect means ± SEM.