. 2025 Feb 25;10:15. doi: 10.1186/s40834-025-00346-7

Table 2.

Pooled estimate of the odds ratio of infertility by menarche age

menarche age	Number of evidence	Sample size (expose group)	Sample size (non-expose)	Pooled estimate of the odds ratio of infertility		Publication Bias total (Egger test)		Sensitivity analysis result (Yes, No) ^*	^{Heterogeneity}
menarche age	Number of evidence	Sample size (expose group)	Sample size (non-expose)	OR (95% CI)	Significant impact of menarche age on the infertility (Yes, No)	β	P-value	Sensitivity analysis result (Yes, No) ^*	^{I−square; %}	^{p−value for Q}
Early vs. late menarche age	21	11,340	6164	0.77(0.55, 1.06)	No	0.60	0.590	No	85.6	< 0.001
Early vs. normal menarche age	11	5950	52,905	0.98 (0.68, 1.42)	No	0.63	0.637	No	85.7	< 0.001
late vs. normal menarche age	11	1782	52,905	1.44(0.98, 2.10)	No	-0.27	0.842	No	79.6	< 0.001

*Is there a significant difference in the impact of each of the primary studies on the overall estimate?