Table 2.
Results of the subgroup analysis of sleep problems.
| Subgroups | Number | Prevalence (95%CI) | Between-study heterogeneity | Z | Over all P Value | Between-group difference | |||
|---|---|---|---|---|---|---|---|---|---|
| P Value | I2 (%) | P Value | Chi2 | I2(%) | |||||
| Gender | 0.93 | 0.01 | 0 | ||||||
| Male | 10 | 0.23 (0.19, 0.28) | <0.00001 | 94 | 9.93 | <0.00001 | |||
| Female | 10 | 0.24 (0.18, 0.30) | <0.00001 | 98 | 12.19 | <0.00001 | |||
| Region | 0.02 | 5.49 | 82 | ||||||
| Northern | 4 | 0.34 (0.28, 0.40) | <0.00001 | 97 | 10.95 | <0.00001 | |||
| Southern | 5 | 0.25 (0.20, 0.29) | <0.00001 | 93 | 10.75 | <0.00001 | |||
| Education | <0.00001 | 22.01 | 96 | ||||||
| Undergraduate | 11 | 0.29 (0.23, 0.34) | <0.00001 | 98 | 9.73 | <0.00001 | |||
| Postgraduate | 1 | 0.13 (0.10, 0.16) | / | / | 7.87 | <0.00001 | |||
| Grade | 0.01 | 12.90 | 69 | ||||||
| 1 | 4 | 0.31 (0.17, 0.45) | <0.00001 | 95 | 4.42 | <0.00001 | |||
| 2 | 4 | 0.28 (0.11, 0.46) | <0.00001 | 97 | 3.21 | 0.001 | |||
| 3 | 4 | 0.31 (0.14, 0.48) | <0.00001 | 96 | 3.61 | 0.0003 | |||
| 4 | 2 | 0.41 (0.15, 0.67) | <0.00001 | 93 | 3.08 | 0.0002 | |||
| 5 | 1 | 0.60 (0.46, 0.74) | / | / | 8.66 | <0.00001 | |||
| University type | 0.001 | 10.43 | 90 | ||||||
| Western | 13 | 0.28 (0.23, 0.33) | <0.00001 | 98 | 11.87 | <0.00001 | |||
| Traditional | 1 | 0.19 (0.17, 0.22) | / | / | 12.25 | <0.00001 | |||