Table 3.

Blood-loss related complications of patients in included studies.

Study/complications	Hypothyroid group, n (%)	Control group, n (%)	OR	95% CI	P-value
Jing et al. (14)
Transfusion	78 (19.6)	60 (15.1)	1.37	1.30–1.44	0.03
Anemia	29 (7.3)	17 (4.3)	1.76	1.67–1.85	0.039
Buller et al. (7)
Post-operative blood loss	404 (0.41)	315 (0.32)	1.252	1.080–1.451	0.03
Transfusion	1212 (1.23)	848 (0.86)	1.428	1.307–1.561	<0.01
Anemia	1902 (1.93)	1429 (1.45)	1.321	1.237–1.422	<0.01
Yuan et al. (16)			N/A	N/A
Transfusion	10 (7.46)	4 (2.99)			0.1
Anemia	123 (91.79)	107 (79.85)			0.01
Yuan et al. (17)			N/A	N/A
Transfusion	7 (11.11)	2 (3.17)			0.084
Anemia	57 (90.48)	48 (76.3)			0.031