Table 3.

Partial correlation analysis of mortality and its influencing factors

	All RCTs that emphasized mortality		RCTs that included patients with similar baseline
	Reduction of mortality		Reduction of mortality
n-6:n-3	γa = 0.23	P = 0.31	γ = 0.60	P = 0.02
Treatment duration	γ = 0.12	P = 0.59	γ = 0.24	P = 0.41
Nutrition support methods	γ = − 0.26	P = 0.26	γ = − 0.01	P = 0.99
Comparison methods	γ = − 0.19	P = 0.40	γ = − 0.48	P = 0.08
TNb	γ = − 0.32	P = 0.16	γ = − 0.54	P = 0.05

^aγ: partial correlation coefficient. ^bTN total number of patients in the study