Table 3.
Pittsburgh Sleep Quality Index (PSQI) total score comparisons among healthy controls, heroin users and MA users in samples of overall, male, and female, respectively.
| Groups | N | Mean | SD | 95% CI (lower, upper) | P* | |
|---|---|---|---|---|---|---|
| Overall | Control | 2,236 | 4.2 | 2.47 | 4.09, 4.30 | <0.001 |
| MA | 962 | 6.6 | 4.48 | 6.31, 6.88 | ||
| Heroin | 1,216 | 9.1 | 4.01 | 8.84, 9.29 | ||
| Male | Control | 1,910 | 4.2 | 2.46 | 4.05, 4.27 | <0.001 |
| MA | 884 | 6.4 | 4.45 | 6.08, 6.67 | ||
| Heroin | 991 | 9.1 | 3.96 | 8.86, 9.36 | ||
| Female | Control | 326 | 4.4 | 2.51 | 4.14, 4.68 | <0.001 |
| MA | 78 | 9.1# | 4.00 | 8.18, 9.98 | ||
| Heroin | 225 | 8.9# | 4.21 | 8.30, 9.40 | ||
CI, confidence interval for mean.
*Significantly different from male group, p < 0.01.
#No significant differences between female heroin and female MA groups, p = 0.61.