From the selected district one Union
Council, named Yusufpur Union, has been selected at random. From the selected Union,
two villages (smallest administrative unit in rural areas) namely, Baduria and Sahapur have
been selected using the probability proportional to size (PPS) technique with random
number pairs (01, 0131) and (10, 1003) respectively. All persons 60 years of age and older
residing in the households of the two villages have been interviewed.