The specific objectives of the baseline survey are to:
Sample design and Sample Size
The Baseline Survey is conducted in the NBVAS 6 upazilas, namely,Sadar and Swarupkathiupazilas in Pirojpur district, Modhupur and Shakhipur upazilas in Tangail district, and Jaldhaka and Dimlaupazilas in Nilphamari district. The survey is done interviewing a sample of 5,400 mothers of children aged 0-6, selected from 180 clusters (with30 clusters included from each of the 6 upazilas) drawing 30 mothers from a cluster. A cluster is village/mauza in rural areas and a mohollah in urban areas. The sample is selected in two stages.
The number of recently delivered women are sampled that is required to discern whether the mother-family delivery model has at least 10% higher coverage compared with CHW model. Sample size estimates require that we consider a plausible intervention effect (i.e. the difference between the two delivery models with respect to the proportion of newborns being given 50,000 IU vitamin A within two days of birth), acceptable probabilities for Type (α=0.05) and Type II (β=0.20 errors) and a design effect of 2.0. It is expected that the coverage of newborn Vitamin A supplementation at endline survey is approximately 50 percent in the mother-family member dosing model areas (assuming that all the 50 percent of the women receiving antenatal care during pregnancy receive and dose their newborns with Vitamin A supplements). To detect a 10 % change, a sample size of 816 respondents per delivery model (CHW or mother-family dosing model) and program setting would be required. Allowing for a non-response rate of 10 %, a sample size of 900 per model and per program setting would be required. This baseline survey is interviewing 5400 respondents in the 6 upazilas covered by the program.