Selection of villages: Since it was a repeat survey,
120 villages were covered in each state, therefore,
90 villages were selected randomly from the list of
villages already covered at baseline (1985-1987)9 and
1st repeat survey (1998-1999)10, and the remaining 30
villages were selected as new villages from the Census
200111.
Selection of households: From each of the selected
villages, 40 tribal households (HHs) were covered
randomly. If more than one tribe was present in the
selected village, total number of HHs in each tribe
were enumerated and 40 HHs were covered based on
the probability proportion to size (PPS) of HHs from
each tribe residing in the selected village.