Meta-analysis and meta-regression of dropouts in long-term exercise studies
| Meta-analysis | Heterogeneity I2 | ||||
|---|---|---|---|---|---|
| Analysis | Number of study estimates | Prevalence dropout (%) | 95% CI | Between-group p value | |
| Main analysis drop out all studies | 10 | 40.34 | 23.31 to 60.07 | 80% | |
| Intervention type | 0.18 | ||||
| Aerobic | 5 | 53.77 | 27.29 to 78.28 | 78% | |
| Aerobic+resistance training | 3 | 40.57 | 12.68 to 76.23 | 85% | |
| Others | 2 | 13.03 | 2.26 to 49.30 | 0% | |
| Exercise sessions per week | 0.31 | ||||
| 1 | 1 | 7.0% | 0.33% to 64.37 | 0% | |
| 3 | 5 | 38.70 | 15.90 to 67.97 | 82% | |
| ≥5 | 4 | 51.70 | 21.87 to 80.37 | 84% | |
| Meta-regression analyses | Number of studies | β | 95% CI | p Value | R2 |
| Mean age | 9 | 0.0766 | −0.0218 to 0.175 | 0.127 | 0 |
| Percentage of males | 8 | 0.0622 | 0.0335 to 0.0908 | <0.0001 | 0.82 |
| Illness duration | 4 | 0.1193 | −0.0926 to 0.3313 | 0.2698 | 0.13 |
| Duration of study | 9 | 0.0121 | −0.0421 to 0.0663 | 0.6617 | 0 |
| Length of exercise sessions | 10 | −0.0368 | −0.0871 to 0.0136 | 0.1522 | 0 |