The correlation of intraoperative hypotension and postoperative cognitive impairment: a meta-analysis of randomized controlled trials

Table 2 Secondary outcomes of this meta-analysis

Outcome	Number of studies	Number of participants		RR or MD	95% CI	Hterogeneity/I²	P value
Outcome	Number of studies	Low-target	High-target	RR or MD	95% CI	Hterogeneity/I²	P value
Mortality	4	322	316	0.86	0.14 to 5.37	44%	0.88
Length of hospital stay	4	322	316	0.37	−0.17 to 0.91	0%	0.18
Length of ICU stay	3	271	266	1.82	0.83 to 2.82	0%	0.0003
MV time	2	147	142	0.40	−1.26 to 2.06	58%	0.64

Abbreviations: RR Risk ratio, MD Mean difference, CI Confidence interval, MV Mechanical ventilation

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