Table 2

Quality of evidence assessment for vitamin A treatment for measles

Quality assessment
Summary of findings
Directness
No of events
No. of studies (ref.)DesignLimitationsConsistencyGeneralizability to population of interestGeneralizability to intervention of interestInterventionControlRelative benefita(95% CI)
Measles Mortality: moderate outcome specific quality
5 (46–51)RCTNoneNo heterogeneityOnly African studies (−0.5)Different doses of vitamin A (−0.5)193337% (−8 to 63)b
Measles mortality (At least two doses of 200 000 IU for children and 100 000 IU for infants): moderate outcome specific quality
3 (46–48)RCT<50 events (−0.5)cNo heterogeneityOnly African studies (−0.5)Generalizable82362% (19 to 82)b
Quality assessment
Summary of findings
Directness
No of events
No. of studies (ref.)DesignLimitationsConsistencyGeneralizability to population of interestGeneralizability to intervention of interestInterventionControlRelative benefita(95% CI)
Measles Mortality: moderate outcome specific quality
5 (46–51)RCTNoneNo heterogeneityOnly African studies (−0.5)Different doses of vitamin A (−0.5)193337% (−8 to 63)b
Measles mortality (At least two doses of 200 000 IU for children and 100 000 IU for infants): moderate outcome specific quality
3 (46–48)RCT<50 events (−0.5)cNo heterogeneityOnly African studies (−0.5)Generalizable82362% (19 to 82)b

NC, not calculated.

aRelative benefit is 1 – RR.

bCalculated with Mantel–Haenszel method

cDeduction to account for Rule 0 of CHERG Rules for Evidence Review.

Table 2

Quality of evidence assessment for vitamin A treatment for measles

Quality assessment
Summary of findings
Directness
No of events
No. of studies (ref.)DesignLimitationsConsistencyGeneralizability to population of interestGeneralizability to intervention of interestInterventionControlRelative benefita(95% CI)
Measles Mortality: moderate outcome specific quality
5 (46–51)RCTNoneNo heterogeneityOnly African studies (−0.5)Different doses of vitamin A (−0.5)193337% (−8 to 63)b
Measles mortality (At least two doses of 200 000 IU for children and 100 000 IU for infants): moderate outcome specific quality
3 (46–48)RCT<50 events (−0.5)cNo heterogeneityOnly African studies (−0.5)Generalizable82362% (19 to 82)b
Quality assessment
Summary of findings
Directness
No of events
No. of studies (ref.)DesignLimitationsConsistencyGeneralizability to population of interestGeneralizability to intervention of interestInterventionControlRelative benefita(95% CI)
Measles Mortality: moderate outcome specific quality
5 (46–51)RCTNoneNo heterogeneityOnly African studies (−0.5)Different doses of vitamin A (−0.5)193337% (−8 to 63)b
Measles mortality (At least two doses of 200 000 IU for children and 100 000 IU for infants): moderate outcome specific quality
3 (46–48)RCT<50 events (−0.5)cNo heterogeneityOnly African studies (−0.5)Generalizable82362% (19 to 82)b

NC, not calculated.

aRelative benefit is 1 – RR.

bCalculated with Mantel–Haenszel method

cDeduction to account for Rule 0 of CHERG Rules for Evidence Review.

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