Table 1 Quantitative evidence synthesis for mortality outcomes
From: Exercise/physical activity and health outcomes: an overview of Cochrane systematic reviews
Subgroup categories | No of SRs in MA | No of original studies in MA | No of participants in MA | Random-effects pooled RR [95% CI] | I-squared [%] | Prediction interval | Median effect size [IQR] |
|---|---|---|---|---|---|---|---|
Disease type | |||||||
 CVD | 8 | 166 | 24,275 | 0.85 [0.76, 0.96] | 38.5 | 0.65, 1.12 | 0.93 [0.74, 1.00] |
 Others | 2 | 21 | 3395 | 0.97 [0.65, 1.45] | 0.0 | – | 1.03 [0.93, 1.12] |
Type of exercise | |||||||
 Aerobic exercise | 2 | 70 | 15,067 | 0.85 [0.67, 1.08] | 77.9 | 0.07, 11.13 | 0.96 [0.74, 1.01] |
 Multiple exercise | 3 | 20 | 1265 | 0.99 [0.21, 4.61] | 0.0 | 0.00, 21,076.80 | 1.00 [0.40, 4.46] |
 Other exercise | 3 | 52 | 4022 | 0.75 [0.51, 1.10] | 26.4 | 0.03, 20.65 | 0.92 [0.54, 0.93] |
 Not reported | 2 | 45 | 7317 | 0.90 [0.78, 1.03] | 0.0 | 0.37, 2.15 | 0.93 [0.88, 1.12] |
Duration of intervention | |||||||
 Up to 12 months | 4 | 27 | 1845 | 1.00 [0.32, 3.15] | 0.00 | 0.08, 12.41 | 1.00 [0.70, 2.73] |
 More than 12 months | 4 | 140 | 23,638 | 0.88 [0.78, 0.99] | 47.1 | 0.65, 1.18 | 0.93 [0.88, 0.96] |
 Not reported | 2 | 20 | 2187 | 0.72 [0.42, 1.22] | 59.5 | – | 0.74 [0.54, 0.93] |
Session length | |||||||
 Up to 60 mins | 3 | 25 | 2212 | 0.56 [0.35, 0.91] | 0.0 | 0.02, 12.98 | 0.54 [0.40, 4.46] |
 More than 60 mins | 5 | 141 | 22,063 | 0.88 [0.79, 0.97] | 34.7 | 0.69, 1.11 | 0.96 [0.92, 1.00] |
 Not reported | 2 | 21 | 3395 |  |  |  | 1.03 [0.93, 1.12] |
Frequency per week | |||||||
 Up to 3 times | 2 | 43 | 3204 | 0.63 [0.39, 1.00] | 9.4 | – | 0.73 [0.54, 0.92] |
 More than 3 times | 5 | 121 | 20,887 | 0.87 [0.78, 0.98] | 37.8 | 0.68, 1.13 | 0.93 [0.88, 1.00] |
 Not reported | 3 | 23 | 3543 | 1.00 [0.67, 1.48] | 0.0 | 0.08, 12.81 | 1.03 [0.93, 1.12] |
Evidence quality | |||||||
 Very low to low | 6 | 50 | 5791 | 0.70 [0.47, 1.04] | 0.0 | 0.40, 1.23 | 1.00 [0.54, 1.12] |
 Moderate | 4 | 137 | 21,879 | 0.88 [0.79, 0.98] | 45.6 | 0.66, 1.17 | 0.93 [0.88, 0.93] |
Risk of bias (RoB) | |||||||
 Low | 3 | 77 | 9152 | 0.90 [0.78, 1.02] | 0.0 | 0.67, 1.20 | 0.93 [0.90, 1.03] |
 High | 5 | 90 | 16,331 | 0.86 [0.69, 1.06] | 52.9 | 0.52, 1.41 | 0.98 [0.74, 1.01] |
 Unclear | 2 | 20 | 2187 | 0.72 [0.42, 1.22] | 59.5 | – | 0.74 [0.54, 0.93] |
Overall | 10 | 187 | 27,671 | 0.87 [0.78, 0.96] | 26.6 | 0.70, 1.07 | 0.93 [0.81, 1.00] |