Table 2.
Differences in current levels of sleep disturbance, circadian rhythm, and psychological distress observed among Daily, Non-Daily, Non-User marijuana groups.
| Daily n=49 |
Non-Daily n=29 |
Non-User n=20 |
||||||
|---|---|---|---|---|---|---|---|---|
| Mean | SD | Mean | SD | Mean | SD | Test | p | |
| Pittsburgh Sleep Quality Index (PSQI) |
6.96 | 3.79 | 4.86 | 3.19 | 5.00 | 3.74 | F(2,95) =3.91 |
0.02 |
| Insomnia Severity Index (ISI) |
7.94a | 6.06 | 5.07 | 4.34 | 4.25 a | 4.81 | F(2,95) = 4.47 |
0.01 |
| Epworth Sleepiness Scale (ESS) |
5.69 | 3.58 | 6.03 | 3.73 | 4.85 | 3.56 | F(2,95) = 0.65 |
0.52 |
| Morningness/Eveningness (MEQ) |
30.22 | 6.80 | 31.90 | 8.23 | 31.65 | 5.72 | F(2,95) = 0.61 |
0.54 |
| ISI ≥10 | 38.8% a | -- | 10.3% a | -- | 20.0% | -- | X2(2)= 7.75 |
0.02 |
| PSQI>5 | 55.1% | 34.5% | 45.0% | X2(2)= 3.15 |
0.20 | |||
| Patient Health Questionnaire-Depression |
6.24 | 4.65 | 4.14 | 3.82 | 4.05 | 4.25 | F(2,95) = 2.99 |
0.06 |
| Generalized Anxiety Disorder |
3.94 | 3.52 | 2.79 | 3.02 | 2.15 | 2.72 | F(2,95) = 2.57 |
0.08 |
Note: a=Follow-up contrasts with same superscript are significantly different (p<0.05) after correction for multiple comparisons using a simultaneous generalized linear hypothesis test with Tukey contrasts.