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| CBT group | Standard care group | |||||
| Short term | Mean | SD | N | Mean | SD | N |
| Guo 2015 | 9.4 | 3.0 | 32 | 7.0 | 3.7 | 32 |
| Naeem 2015 | 11.2 | 4.1 | 53 | 9.2 | 4.1 | 49 |
| Total | 85 | 81 | ||||
| Medium term | Mean | SD | N | Mean | SD | N |
| Guo 2015 | 9.4 | 3.5 | 32 | 7.8 | 3.9 | 32 |
| Total | 32 | 32 | ||||
| Long term | Mean | SD | N | Mean | SD | N |
| Guo 2015 | 10.4 | 3.6 | 32 | 7.5 | 4.3 | 32 |
| Total | 32 | 32 | ||||
