Efficacy and safety of ondansetron in preventing postanesthesia shivering: a meta-analysis of randomized controlled trials

Table 2 Results of subgroup analysis by dosage of ondansetron and anesthetic techniques

Group	No. of studies	Relative risk	I²	P_{heterogeneity}	Effect model
Dosage
4 mg	3	0.36 (0.22, 0.58)	40.7	0.185	Fixed
8 mg	3	0.47 (0.25, 0.90)	66.0	0.032	Random
Anesthetic technique
General	3	0.40 (0.27, 0.60)	0	0.559	Fixed
Spinal	2	0.23 (0.10, 0.52)	0	0.949	Fixed

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