Characteristics of the respondents: women with children 0 to 11 months, baseline and follow-up surveys.

β The wealth index score was constructed for each household with the principal component analysis of the household possessions (electricity, watch, radio, television, mobile phone, telephone, refrigerator, table, chair, bed, electric stove, and kerosene lamp), and household characteristics (type of latrine and water source). The households were ranked according to the wealth score and then divided into five quintiles indicating poor, medium poor, medium, medium rich and rich households [32].