Subgroups | Studies (n) | Participant (n) | Mean difference | Effect size | ||||
---|---|---|---|---|---|---|---|---|
 |  |  | Mean difference (95% CI) | Q test | I2(%) | Effect size (95% CI) | Q test | I2(%) |
Eight-hour pain score age group | Â | Â | Â | Â | Â | Â | Â | Â |
 < 70 | 3 | 268 | 1.238 (0.175, 2.301) * | 25.271 | 92.086 *** | 1.009 (0.461, 1.558) *** | 8.729 | 77.089 ** |
 70 and more | 3 | 243 | 0.546 (-0.210, 1.302) | 18.279 | 89.059 *** | 1.266 (-0.209, 2.741) | 49.998 | 96.000 *** |
Twenty-four-hour pain score age group | Â | Â | Â | Â | Â | Â | Â | Â |
 < 70 | 4 | 316 | 0.809 (0.445, 1.173) *** | 5.252 | 42.883 | 0.802 (0.380, 1.224) *** | 9.427 | 68.177 * |
 70 and more | 4 | 303 | 0.402 (-0.523, 1.326) | 35.166 | 91.469 *** | 1.131 (-0.086, 2.347) | 66.888 | 95.515 *** |
Forty-eight-hour pain score age group | Â | Â | Â | Â | Â | Â | Â | Â |
 < 70 | 3 | 231 | 0.635 (0.099, 1.172) * | 5.446 | 63.278 | 0.538 (0.157, 0.919) ** | 3.836 | 47.856 |
 70 and more | 4 | 303 | 1.083 (0.473, 1.692) *** | 24.334 | 87.672 *** | 1.549 (0.465, 2.632) ** | 50.873 | 94.103 *** |
Twenty-four-hour pain score BMI group | Â | Â | Â | Â | Â | Â | Â | Â |
 < 30 | 6 | 467 | 0.690 (0.203, 1.177) *** | 56.129 | 91.092 *** | 1.156 (0.325, 1.986) *** | 78.148 | 93.602 *** |
 30 and more | 2 | 152 | 0.492 (-1.265, 2.248) ** | 7.945 | 87.414** | 0.266 (-0.647, 1.179) ** | 8.554 | 88.310 ** |
Forty-eight-hour pain score BMI group | Â | Â | Â | Â | Â | Â | Â | Â |
 < 30 | 5 | 382 | 0.760 (0.169, 1.351) *** | 39.337 | 89.831 *** | 1.158 (0.284, 2.033) * | 54.959 | 92.722 *** |
 30 and more | 2 | 152 | 1.251 (0.402, 2.100) *** | 2.652 | 62.297 | 0.821 (0.519, 1.123) ** | 0.214 | 0.000 |