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Table 2 Quality assessment criteria

From: Childhood disability and socio-economic circumstances in low and middle income countries: systematic review

Quality criterion Optimum Adequate Least valuable
Design & data collection methods Longitudinal Cross-sectional survey or case-control study Case series without controls or comparison groups
Purpose Specifically designed to collect childhood disability data General purpose survey including questions on childhood disability Inadequate childhood disability data
Data collection methods Interview based Interview based Postal questionnaire based
Quantitative/qualitative Combined quantitative & qualitative data on childhood disability Quantitative only for prevalence estimation; qualitative only to study impact of disability on household Either quantitative or qualitative data that cannot be adequately used to estimate prevalence or impact
Definitions & classifications of disability/impairment Definition that is widely used, internationally validated & comparable with other data sets Less than optimal definition but sufficiently detailed to allow reasonable prevalence estimates to be made Unclear definition that does not allow comparison with other data sets
Sampling & sample Representative of households with children in study country & sufficient size to enable prevalence estimates of less common impairments. Representative of households with children in study country Non-representative samples OR Small samples with inadequate numbers to make reliable prevalence estimates
Response rates Full information on response rates with low non-response (< 10%) Limited information on response rates or non-response (10-20%) No response information or high response rates (> 20%)
Household measures of SES & socio-demographic characteristics Data covering measures of income, parental education, household wealth & assets in addition to other socio-demographic characteristics including ethnicity, marital status, parental age, parental disability Limited measures of SES such as maternal education only OR SES measures but limited data on other socio-demographic characteristics No valid measures of SES or S-D characteristics
Information on child Data on age, sex, school attendance Limited information on age but no other data No data on child - only on household as a whole
Information on children (< 19 years) living outside the home Complete data on all children Limited data on all children No data on children living outside the home