National Demographic Survey 1983
After 2 National Demographic Surveys (NDS) and the 1978 Republic of the Philippines Fertility Survey (RPFS), conducted five years apart, the University of the Philippines Population Institute (UPPI) deemed it necessary to conduct another demographic survey in 1983 to measure the level and trend in reproductive behavior and contraceptive practices of ever married women (EMW) in the country. Information gathered include basic household and housing characteristics, pregnancy history of ever‑married women, factors affecting fertility, contraceptive knowledge and use, fertility preferences, family planning communication, mortality levels of both adults and children, lifetime and period movements, and economic activities of males and never married women (15 years and above) in relation to their spatial mobility and nuptiality.
The survey conducted during the period June‑December 1983, made use of a stratified 2‑stage sampling aimed at allocating about 1000 households for each of the 13 regions of the country. From each urban and rural stratum of every region, 20 barangays were drawn with replacement and with probability proportional to the number of households per barangay. Then from each barangay, 25 households were chosen systematically using a random start. However, for the National Capital Region, a total of 40 barangays were chosen since it is composed of urban barangays only. There were 2 types of survey questionnaires administered during a face‑to‑face interview of all EMW's aged 15‑49 years. Half of the total number of sample households in each region were administered the whole questionnaire (Type A) while in the remaining half, the respondents were not asked about migration, and labor force (Type B).