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| Questionnaire | Composition of score values | Minimum value | Maximum value |
| SF-36 (18, 20, 22– 25) | 36 items | 0 | 100 |
| WHOQOL-100 (26, 17) | 100 items | 0 | 100 |
| SHS (35– 37) | VAS, 4 items on a 7 point Likert scale | 4 | 28 |
| SWLS (35– 37) | VAS, 5 items on a 7 point Likert scale | 5 | 35 |
| CLLS (35– 37) | VAS, short scale (L-1) | 0 | 10 |
*For the studies referenced in parentheses, it was not possible to calculate effect sizes
