Fig. 8

Begg’s funnel plots for assessment of publication bias. Each circle demonstrates study included in meta-analysis. 95% CI lines shown in fixed effects models. a Osteonecrosis of any grade at two or more years following open or closed reduction. b Osteonecrosis of any grade II or worse at two or more years following open or closed reduction. c Osteonecrosis of any grade II or worse at two or more years following closed reduction. d Osteonecrosis of any grade II or worse at two or more years following open reduction. e Osteonecrosis of any grade at two or more years following closed reduction. f Osteonecrosis of any grade at two or more years following open reduction