[Retracted] Analysis of the Need for Postoperative Drainage Application for Hip Arthroplasty: A Systematic Review and Meta-Analysis

Table 3

The result of sensitivity analysis.

Outcomes	Removed studies	Result of meta-analysis		Effect-model	Results of heterogeneity
		MD (SMD)	95% CI		(%)
Hb level on POD3	Weinan Zeng, 2014	-0.71	[-1.02, -0.39]	Random effects model	0%	0.03
Hct level	Lychagin, AV, 2020	-1.86	[-5.67, 1.95]	Random effects model	0%	0.73
Total blood loss	Horstmann, WG, 2013	-190	[-335.33, -44.67]	Fixed effects model	0%	0.83
Blood transfusion volume	Weinan Zeng, 2014	0.97	[0.65, 1.29]	Random effects model	67%	0.29
	Qingshan Li, 2019	0.9	[0.24, 1.55]	Random effects model	0%	0.88
Change of thigh circumstance	Dong Yang, 2008	0.1	[-0.35, 0.55]	Fixed effects model	0%	0.48
VAS on POD1	Chengnian Zhang, 2019	-0.22	[-0.58, 0.14]	Fixed effects model	68%	0.01
	Horstmann, WG, 2012	0.2	[-0.41, 0.81]	Fixed effects model	64%	0.02
VAS on POD2	Tianwen Yang, 2016	-0.38	[-0.58, -0.18]	Fixed effects model	18%	0.3
VAS after POD3	Tianwen Yang, 2016	-1	[-1.43, -0.57]	Fixed effects model	0%	0.81
Uses of dressing	Weinan Zeng, 2014	-3.24	[-3.7, 2.77]	Random effects model	92%	0.62