Effect of Different General Anesthesia Methods on the Prognosis of Patients with Breast Cancer after Resection: A Systematic Review and Meta-analysis

Table 1

Risk of bias assessment.

Study	Study design	No. of patients		Risk of bias assessment
		TIVA	IA
Cho et al. [11]	RCT	25	25	Low risk of bias
Hong et al. [13]	Retrospective	154	475	NOS score 7
Huang et al. [12]	Retrospective	334	632	NOS score 6
Kim et al. [14]	Retrospective	56	2589	NOS score 7
Yan et al. [15]	RCT	40	40	Low risk of bias
Yan et al. [16]	RCT	42	38	Low risk of bias
Yoo et al. [2]	Retrospective	3085	2246	NOS score 7

Note: TIVA: total intravenous anesthesia; IA: inhalation anesthesia; NOS: Newcastle-Ottawa Scale.