Setting
MP
The study is a cluster randomized control trial (RCT) of 610 The trial was conducted from 2006 to 2009. Four districts were chosen purposefully in each state, matched across states by literacy rates so that they are comparable on at least one indicator of development. Within a district, 50 GPs were selected from two randomly chosen blocks. A block is the administrative unit between a district and a GP. We used a random number generator to randomly select blocks and then GPs within the blocks. Half of the GPs within each block were then randomly assigned to intervention arm and the remaining half to control arm. Treatment and control GPs were evenly spread across the two blocks to reduce any potential contamination. This gives a total of 100 control GPs and 100 treatment GPs per state in MP and UP.In Karnataka the design was identical except an additional set of treatment villages was added that received a slightly different treatment called information and advocacy campaign. The number of GPs in each of the three cells in Karnataka, control, treatment 1 (information campaign), treatment 2 (information campaign plus advocacy), totaled 70.Sample sizes were determined using cluster randomized sample size calculations based on a 5 percent significance level and 80 percent power.