Table 2 Subgroup analysis to investigate the relationship between geographical location, number of cases, chronological age of cases, the difference between bone age and chronological age of cases, detection reagent and serum AMH
Subgroups | No. of studies | I2 | SMD (95%CI) | P |
|---|---|---|---|---|
Geographical location | ||||
Europe | 3 | 93% | -0.05 (-1.07, 0.96) | 0.92 |
North America | 1 | -0.59 (-1.21, 0.03) | 0.06 | |
Central Asia | 3 | 30% | 0.19 (-0.17, 0.54) | 0.31 |
Asia | 3 | 0% | 0.19 (-0.03, 0.40) | 0.09 |
Cases | ||||
< 50 | 5 | 46% | 0.15 (-0.16,0.45) | 0.35 |
≥ 50 | 5 | 87% | 0.00 (-0.51,0.52) | 0.99 |
Chronological age | ||||
< 8 | 8 | 82% | 0.03 (-0.36, 0.43) | 0.87 |
≥ 8 | 2 | 0% | 0.15 (-0.12, 0.41) | 0.28 |
BA-CA | ||||
< 1.5 | 4 | 86% | 0.22 (-0.41, 0.84) | 0.50 |
≥ 1.5 | 3 | 0% | 0.19 (-0.03, 0.40) | 0.09 |
NA | 3 | 41% | -0.33 (-0.73, 0.08) | 0.12 |
Detection reagent | ||||
Beckman | 6 | 19% | 0.07 (-0.13, 0.27) | 0.50 |
Others | 4 | 90% | 0.10 (-0.65, 0.85) | 0.80 |