Table 2.

Overall results and sensitivity analysis.

Outcomes	RR, 95% CI	P	I 2
Hearing impairment
Overall	2.105 (1.115, 3.971)	0.022	65.3%
Sensitivity analysis	2.105 (1.115, 3.971)
SNHL
Overall	17.051 (6.201, 46.886)	<0.001	0.0%
Sensitivity analysis	17.051 (6.201, 46.886)
Microcephaly
Overall	2.283 (1.325, 3.935)	0.003	0.0%
Sensitivity analysis	2.283 (1.325, 3.935)
Neurodevelopmental delay
Overall	2.910 (0.417, 20.285)	0.281	54.0%
Sensitivity analysis	2.910 (0.417, 20.285)
MDI
Overall	-0.940 (-3.473, 1.593)	0.467	0.0%
Sensitivity analysis	-0.940 (-3.473, 1.593)
PDI
Overall	2.717 (-1.068, 6.501)	0.159	0.0%
Sensitivity analysis	2.717 (-1.068, 6.501)

SNHL: sensorineural hearing loss; MDI: mental development index; PDI: psychomtive development index.