Contraceptive Prevalence Survey 1986
The 1986 Contraceptive Prevalence Survey (CPS) was conducted for the purpose of investigating the knowledge and use of contraception among a nationally representative sample of married women of childbearing age, 15-49 years, in the thirteen regions nationwide. The survey included aspects of use and access to family planning services. An in-depth investigation of reasons underlying the knowledge, attitude and practice‑gap (KAP-GAP) and discontinuation of contraceptive practice was also undertaken simultaneously.
The survey was also done to collect current information on contraceptive prevalence to: (1) enable management to gauge the progress of the national family planning program towards the ultimate objective of attaining replacement fertility by the year 2010; (2) provide region-specific information on current method used, the length of protections these methods confer on women exposed to pregnancy risks, reasons for discontinuation, and prospects of contraceptive use among married couples of reproductive age; and (3) offer practical training on field survey operations for the Commission on Population (POPCOM) regional and central office personnel.
The sampling design used in the 1986 Contraceptive Prevalence Survey (CPS) is a modified version of the one used in the 1983 National Demographic Survey (NDS) which featured a stratified two-stage random sampling involving: (1) the listing of all the households in the selected sample barangays; (2) mapping the selected barangays; (3) drawing the sample households; (4) conducting the interviews, field editing the submitted and completed interviews and; (5) spot checking. These activities were carried out sequentially thus requiring the interviewers to remain in the area until completion of the interviews and their preliminary editing.
The primary unit of observation is the barangay which were chosen with replacement according to probability proportional to the number of households in each stratum. The secondary units were the households which were selected systematically with a random start. Since regional estimates were required, each of the thirteen (13) regions composing the country was sampled. A total of forty (40) barangays were selected from each of the regions to ensure stability of the contraceptive prevalence rate estimates in each stratum and region. Within each region, a complete list of the barangays were compiled indicating the number of households in each barangay and their rural or urban classification.
The sampling frame used is the barangays listed in the 1980 Census of Population and Housing. Each selected barangay was mapped and all the households therein listed. Fifty or so households were selected systematically from these lists and all ever‑married women in these sample households were interviewed.
The total number of barangays selected for the country as a whole was 520, 130 from the urban stratum and 390 from the rural stratum. Of this number, 115 had to be substituted before listing on the advice of the local POPCOM staff or for other reasons. For barangays that were drawn twice or thrice, the corresponding 100 or 150 samples were selected. However, each set of 50 sample households were treated as a separate or unique barangay.