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Table 2 Risk of bias of the included studies

From: Systematic review of heath care interventions to improve outcomes for women with disability and their family during pregnancy, birth and postnatal period

Keltner[20] Author’s judgment Support of judgment
Allocation sequence (potential selection bias) Unclear risk Method not specified
Allocation concealment (potential selection bias) Low risk Allocation was performed independently by a person not associated with the project
Baseline differences in outcomes High risk Imbalanced for the marital status and not adjusted
Baseline differences in characteristics Low risk No significant difference see Table 1
Incomplete outcome data (potential attrition bias) Low risk No attrition
Knowledge of interventions (potential detection bias) Low risk Assessed blindly: assessors blinding: local professionals who would likely know some or all of the families participating were not involved in the assessments
Contamination - -
Selective outcome reporting Low risk No other outcomes mentioned
Other risks of bias Low risk  
Scafidi[22] Author’s judgment Support of judgment
Allocation sequence Low risk Random number table
Allocation concealment Low risk Randomised by researcher not associated with the project
Baseline differences in outcomes Low risk Imbalanced but adjusted
Baseline differences in characteristics Low risk Adjusted
Incomplete outcome data Low risk No drop out
Knowledge of interventions Low risk Assessors were blind to the group intervention
Contamination - -
Selective outcome reporting Low risk No other outcomes mentioned
Other risks of bias Low risk  
Barbosa[21] Author’s judgment Support of judgment
Allocation sequence High risk By clinic attendance day
Allocation concealment Unclear risk No information
Baseline differences in outcomes Unclear risk No information
Baseline differences in characteristics High risk No comparison made between the groups
Incomplete outcome data Unclear No information
Knowledge of interventions Unclear No information
Contamination - -
Selective outcome reporting Low risk Only reported items measured
Other risks of bias Low risk