Table 5.

Statistical significance of two outcome indicators of included studies.

Study name	Statistics significance					Relative weight (%)
	Statistical difference value	Lower limit	Upper limit	Standard error	Significance level
The primary outcome indicator: HHS
Sun et al. (22)	−0.200	−3.483	3.083	1.656	0.904	40.07
Guo et al. (41)	7.900	−0.826	16.626	4.368	0.075	23.10
Puram et al. (20)	−2.200	−5.381	0.981	1.604	0.173	36.82
The secondary outcome indicator: complication incidence
Qi et al. (22)	14.444%	2.7%	26.2%	0.060	0.048	63.43
Guo et al. (41)	26.103%	8.3%	43.9%	0.091	0.008	36.57
Subtotal:	13.188%	5.6%	20.8%	0.039	0.002	100