Fig. 2
Summary association of COL5A1 rs12722 polymorphism with TLI studies in the dominant model. Numbers in brackets under the study column indicate references. Squares indicate the odds ratio (OR) in each study, with square sizes directly proportional to the weight contribution (%) of the study. Horizontal lines on each side of the squares represent 95% confidence intervals (CIs). The random-effects model was used on account of the presence of heterogeneity (p = 0.001, I2 = 69%). M–H Mantel–Haenszel; df degree of freedom; TU Turkey; UK United Kingdom; POL Poland; SA South Africa; AU Australia