Comparison 10. Ascorbic acid versus placebo or no treatment.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Blood loss (ml)	1	102	Mean Difference (IV, Fixed, 95% CI)	‐411.46 [‐502.58, ‐320.34]
2 Need for blood transfusion	1	102	Odds Ratio (M‐H, Fixed, 95% CI)	0.38 [0.11, 1.32]
3 Duration of surgery (min)	1	102	Mean Difference (IV, Fixed, 95% CI)	‐26.0 [‐33.10, ‐18.90]
4 Duration of hospital stay (days)	1	102	Mean Difference (IV, Fixed, 95% CI)	‐0.40 [‐0.65, ‐0.15]
5 Posoperative haemoglobin drop (g/dl)	1	102	Mean Difference (IV, Fixed, 95% CI)	0.14 [‐0.22, 0.50]
6 Pospoerative hematocrit drop (%)	1	102	Mean Difference (IV, Fixed, 95% CI)	‐0.70 [‐1.34, ‐0.06]
7 Posoperative complications	1		Odds Ratio (M‐H, Fixed, 95% CI)	Totals not selected
7.1 Postoperative fever	1		Odds Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]
7.2 Postoperative vomiting	1		Odds Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]
7.3 Postoperative constipation	1		Odds Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]
7.4 Severe pain	1		Odds Ratio (M‐H, Fixed, 95% CI)	0.0 [0.0, 0.0]