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Odds ratios (OR) with 95% confidence interval (CI) lower and upper limits
| ARTICLE | OR | LOWER | UPPER |
|---|---|---|---|
| Rai et al8 2013 | 2.18 | 1.37 | 3.46 |
| Croen et al9 2011 | 2.1 | 1.23 | 3.58 |
| Pedersen et al10 2010 | 0.74 | 0.046 | 1.2 |
Mantel-Haenszel OR=1.39; 95% CI (1.04,1.85); test for heterogeneity: chi-squared (2)=12.53 (p value=0.0019)
