Comparison 2. Retrograde intramedullary nail (RIMN) versus single fixed‐angle device.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Adverse events	3		Risk Ratio (M‐H, Fixed, 95% CI)	Subtotals only
1.1 Re‐operation	3	159	Risk Ratio (M‐H, Fixed, 95% CI)	1.85 [0.62, 5.57]
1.2 Death	1	23	Risk Ratio (M‐H, Fixed, 95% CI)	0.46 [0.05, 4.38]
1.3 Infection	3	159	Risk Ratio (M‐H, Fixed, 95% CI)	0.60 [0.14, 2.54]
1.4 Pneumonia	1	23	Risk Ratio (M‐H, Fixed, 95% CI)	0.46 [0.05, 4.38]
1.5 Urinary tract infection	1	23	Risk Ratio (M‐H, Fixed, 95% CI)	6.46 [0.37, 112.54]
1.6 Acute renal failure	1	23	Risk Ratio (M‐H, Fixed, 95% CI)	2.77 [0.12, 61.65]
1.7 Pressure sores	1	23	Risk Ratio (M‐H, Fixed, 95% CI)	2.77 [0.12, 61.65]
1.8 Haematoma requiring aspiration	1	72	Risk Ratio (M‐H, Fixed, 95% CI)	0.21 [0.01, 4.25]
1.9 Implant failure	1	68	Risk Ratio (M‐H, Fixed, 95% CI)	0.84 [0.05, 12.85]
1.10 Nail protrusion	1	68	Risk Ratio (M‐H, Fixed, 95% CI)	5.89 [0.32, 109.91]
2 36‐item Short Form (SF‐36; higher scores = better quality of life)	1		Mean Difference (IV, Fixed, 95% CI)	Totals not selected
2.1 Physical component (0 to 100)	1		Mean Difference (IV, Fixed, 95% CI)	0.0 [0.0, 0.0]
2.2 Mental component (0 to 100)	1		Mean Difference (IV, Fixed, 95% CI)	0.0 [0.0, 0.0]
3 Failure of union	3		Risk Ratio (M‐H, Fixed, 95% CI)	Subtotals only
3.1 Non‐union	3	159	Risk Ratio (M‐H, Fixed, 95% CI)	1.10 [0.33, 3.71]
3.2 Malunion	3	159	Risk Ratio (M‐H, Fixed, 95% CI)	1.84 [0.28, 11.97]
4 Length of hospital stay (days)	1	72	Mean Difference (IV, Fixed, 95% CI)	‐2.80 [‐3.40, ‐2.20]