Table 4.

Sensitivity analysis of effectiveness indicators.

	Fixed effect model			Excluded the RCT with maximum weight			Excluded the RCT with minimum weight
Outcome measures	RR	95%CI	P	RR	95%CI	P	RR	95%CI	P
Pain relief	1.75	1.52–2.00	<.00001	1.78	1.50–2.11	<.00001	1.70	1.47–1.96	<.00001
Absence of photophobia	1.32	1.22–1.42	<.00001	1.36	1.23–1.51	<.00001	1.34	1.22–1.47	<.00001
Absence of nausea	1.07	1.03–1.12	.0004	1.09	1.04–1.14	.002	1.07	1.03–1.12	.0004
Absence of phonophobia	1.21	1.14–1.28	<.00001	1.20	1.13–1.29	<.00001	1.21	1.14–1.28	<.00001

95%CI = confidence interval, RCTs = randomized controlled trials, RR = relative risk.