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Meta-regression in order to investigate the related factors with heterogeneity on odds ratio (OR)
| Variables | OR for Early vs. late menarche | OR for Early vs. normal menarche | OR for late vs. normal menarche | |||
|---|---|---|---|---|---|---|
| β | P-value | β | P-value | β | P-value | |
| Type of infertility | 0.49 | 0.310 | -0.07 | 0.979 | -3.31 | 0.206 |
| Definition of early menarche | -0.08 | 0.574 | -0.77 | 0.525 | -0.98 | 0.432 |
| Definition of late menarche | -0.23 | 0.253 | 0.03 | 0.974 | 0.94 | 0.338 |
