Table 3.

Sensitivity analysis

Study	Parameter	Before exclusion	After exclusion	Statistical significance
Tang et al. [22]	OT	SMD = 0.28, 95% CI = 0.07 to 0.50, I² = 64%	SMD = 0.35, 95% CI = 0.17 to 0.53, I² = 40%	Difference
Sun et al. [21]	BL	SMD = -0.29, 95% CI = -0.54 to -0.04, I² = 57%	SMD = -0.17, 95% CI = -0.34 to 0.00, I² = 0%	Difference
Guo et al. [19]	IS ratio	WMD = 0.05, 95% CI = -0.01 to 0.11, I² = 91%	I² > 50%	No difference
Huang et al. [20]
Jenkins et al. [24]
Reid et al. [27]
Su et al. [11]
Tang et al. [22]
Tang et al. [22]	VAS-1 M	WMD = -0.58, 95% CI = -1.13 to -0.02, I² = 96%	WMD = -0.29, 95% CI = -0.42 to -0.16, I² = 0%	Difference
Reid et al. [27]	VAS-3 M	WMD = -0.36, 95% CI = -0.64 to -0.08, I² = 83%	WMD = -0.20, 95% CI = -0.32 to -0.08, I² = 0%	Difference
Zan et al. [26]	VAS-1Y	WMD = -0.07, 95% CI = -0.21 to 0.06, I² = 66%	WMD = -0.13, 95% CI = -0.23 to -0.03, I² = 26%	Difference
Dalury et al. [29]	ROM-3 M	SMD = 0.48, 95% CI = -0.00 to 0.96, I² = 85%	I² > 50%	No difference
Guo et al. [19]
Huang et al. [20]
Reid et al. [27]
Sun et al. [21]
Zan et al. [26]
Su et al. [11]	HSS	SMD = 0.58, 95% CI = -0.08 to 1.25, I² = 87%	SMD = 0.20, 95% CI = -0.03 to 0.42, I² = 0%	Difference

SMD, standard mean difference; WMD, weighted mean difference; CI, confidence interval; OT, operation time (min); BL, blood loss (ml); ROM, knee range of motion (˚); VAS, visual analogue scale score; HSS, Hospital for Special Surgery score; IS, Insall-Salvati ratio