Summary of results from the primary random-effects meta-analysis and the subgroup random-effects meta-analyses
| Amount of studies | OR (95% CI) | I2 | P | |
|---|---|---|---|---|
| Primary meta-analysis | 12 | 0.90 (0.79–1.02) | 59% | 0.10 |
| Subgroup meta-analysis | ||||
| Study design | ||||
| Cohort studies | 5 | 1.02 (0.88–1.19) | 52% | 0.76 |
| Case–control | 7 | 0.81 (0.68–0.96) | 49% | 0.02 |
| Subgroup differences | – | 76% | 0.04 | |
| Type of lymphoma | ||||
| Hodgkin lymphoma | 3 | 0.82 (0.47–1.42) | 63% | 0.47 |
| Non-Hodgkin lymphoma | 11 | 0.92 (0.81–1.04) | 57% | 0.19 |
| Subgroup differences | – | 0% | 0.69 | |
| Physical activity domain | ||||
| Recreational | 8 | 0.86 (0.73–1.02) | 65% | 0.08 |
| Occupational | 6 | 0.98 (0.80–1.21) | 0% | 0.88 |
| Subgroup differences | – | 1.1% | 0.31 | |
NOTE: Bold values indicate P < 0.05.