APPENDIX A SURVEY DESIGN

Transcription

1 APPENDIX A SURVEY DESIGN

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3 APPENDIX A SURVEY DESIGN The main objective of the Indonesia Demographic and Health Survey (IDHS) is to provide data concerning fertility, family planning, and maternal and child health that can be used by program managers and policymakers to evaluate and improve existing programs. The survey is a follow-on to the National Indonesia Contraceptive Prevalence Survey. A.1 SAMPLE DESIGN AND IMPLEMENTATION Indonesia is divided into 27 provinces. For the implementation of its family planning program, the National Family Planning Coordinating Board (BKKBN) has divided these provinces into three regions as follows: Java-Bali: Jakarta, West Java, Central Java, Yogyakarta, East Java, and Bali Outer Java-Bali I: Aceh, North Sumatra, West Sumatra, South Sumatra, Lampung, West Kalimantan, South Kalimantan, North Sulawesi, South Sulawesi, and West Nusa Tenggara Outer Java-Bali II: Riau, Jambi, Bengkulu, East Nusa Tenggara, East Timor, Central Kalimantan, East Kalimantan, Central Sulawesi, Southeast Sulawesi, Maluku, and Irian Jaya. The 1990 Population Census of Indonesia shows that Java-Bali contains about 62 percent of the national population, while Outer Java-Bali I contains 27 percent and Outer Java-Bali II contains 11 percent. The sample for the Indonesia DHS survey was designed to produce reliable estimates of contraceptive prevalence and several other major survey variables for each of the 27 provinces and for urban and rural areas of the three regions. In order to accomplish this goal, approximately 1500 to 2000 households were selected in each of the provinces in Java-Bali, 1000 households in each of the ten provinces in Outer Java-Bali I, and 500 households in each of the 11 provinces in Outer Java-Bali II for a total of 28,000 households. With an average of 0.8 eligible women (ever-married women age 15-49) per selected household, the 28,000 households were expected to yield approximately 23,000 individual interviews. The IDHS sample is drawn from the 1990 Population Census 5 Percent Sample. In most provinces, a two-stage sampling procedure was employed. First, enumeration areas (EAs or wilcah) were selected with probability proportional to size within urban and rural domains in each province. In the second stage, individual households were selected from the household listings for each EA. In Java-Bali and Outer Java- Bali I, 25 households were selected in each EA. In Outer Java-Bali II, 20 households were selected in each EA. In the six most remote and logistically difficult provinces (East Timor, Irian Jaya, Maluku, East Nusa Tenggara, Central Kalimantan, East Kalimantan), a three-stage procedure was used. First, regencies (kabupaten) were selected. Next, within regencies, EAs and then households were selected. This procedure has the effect of concentrating the sample and reducing the level of effort required during fieldwork. Since the sample was designed to produce estimates at the provincial level, the number of households selected in each province was nonproportional at the national level. Specifically, households in the Outer Islands were oversampled. The results presented in this report are based on data winch are weighted to take account of differential sampling probabilities and nonresponse at both the household and individual level. The weights are used to produce estimates winch are representative at the appropriate level of aggregation (e.g., provincial, regional, national). 151

4 Results of the sample implementation by province and in urban and rural domains are shown in Tables A.1 and A.2. As shown in Table A.1, 28,141 households were visited by IDHS interviewers. Of these, 95.4 percent yielded complete interviews, 2 percent were found vacant, 1 percent were absent, and the remainder were not interviewed for other reasons. The response rate at the household level (see Table A.1 for definition) is 99 percent. In the interviewed household, 23,470 eligible women were found (see Table A.2). Of these, 98 percent (22,909 women) were successfully interviewed. Table A.1 Sample implementation: results of the household interview Percent distribution of households in the sample by results of the interview, and household response rates, according to region, province, and urban-rural residence, Indonesia 1991 Region/province Household present but no Dwelling House- Household Household competent not hold Dwelling Dwelling mspense completed respondent Refused found absent vacant destroyed Other care I (C) (HP) (P,) (DNF) (HA) (DV) (DD) (0) Total Number (HRR) Java.Ball DK1 Jakarta West Java , Central Java 9% , DI Yogyaka.rta East Java Bali 97,1 0, Outer Java-Bali I , , DI Aceh , North Sumatra West Sumatra South Sumatra Lampung West Nusa Tenggara 97, West Kallmantan South Kallmantan ,2 0, No~h Sulawesi South Sulawesi , Outer Java-Bali II Riaa Jambi Bengkulu O , East Nusa Tenggara , East Timer Central Kalimantan , East Kalimantan , Central Sulawesi , Southeast Sulawesi Maluku S hian Jaya , Residence Urban Rural , , Total O The household response rate is calculated as: HRR= C C+HP+R+DNF 152

5 Table A.2 Sample implementation: results of the individual interview Percent distribution of eligible women in the sample by results of the interview, and response rates for eligible women and overall response rates, according to region, province, and urban-rural residence, Indonesia 1991 Eligible Not Partly women Overall Corn- at Post- corn- response response pleted home poned Refused pleted Other rate I rate 2 Region/province (C) (Nit) (PP) (R) (PC) (O) Total Number(EWRR) (ORR) rata-bull DKI Jakarta West Java Central Java D1 Yogyakarta East Java Bali ~)uter Java.Ball I DI Aceh North Sumatra West Sumatra South Sumatra Lampung West Nusa Tenggara A West Kallmantan South Kalinmatan North Sulawesi South S ulawesi Outer Java.Ball 1I Riau Jambi Bengkulu , East Nusa Tenggara East Tim~ Central Kalimantsn East Kalimantan Central Sulawesi Southeast Sulawesi Malukm /rian/aya Residence Urban Rural Total tthe eligible woman response rate is calculated as: EWRR = C C+ NH+PP+R + PC 2The overall response rate is calculated as: ORR = HRR x EWRR 153

6 A.2 PRETEST The protest for the IDHS was held in May 1990 in three provinces Jambi, West Java, and East Nusa Tenggara (NTT). In each location, seven persons were trained to form a team consisting of one field manager, one supervisor, one field editor, and four interviewers. The Chief of the Social and Population Statistics Division in each Provincial Statistical Office (PSO) performed the function of field manager and was responsible for carrying out the pretest activities in his province. All of the interviewers in Jambi and West Java and one in NTT were drawn from the PSO staff. The pretest training lasted for two weeks. For the pretest fieldwork, 100 individual interviews were conducted in urban and rural areas of the three provinces. During the fieldwork, several errors in the questionnaire were identified. These were mainly skip and filter errors which were easily corrected. It was also discovered that the translations of some of the questions into Bahasa Indonesia were incorrect or misleading. These translation problems were discussed among the survey organizers and corrected. A.3 FIELD STAFF TRAINING The training of the more than 250 field staff for the IDHS took place at nine training centers throughout Indonesia. Prior to the training of field staff for the main survey, however, a course was held in order to prepare those who were to serve as instructors at the training centers, those who were responsible for coordination of field activities at the provincial level, and data processing staff. This course took place in Bogor, West Java in April 1991 and was attended by 41 persons including provincial level staff and staff from Central Bureau of Statistics (CBS) headquarters. Instructors for this course were the survey organizers who had previously conducted training for the pretest held in May The course was identical to the interviewer's training course normally given for DHS surveys, although no field practice was included. In addition, logistical and administrative matters, and issues related to sample implementation were covered. Since the CBS was occupied with activities related to the October 1990 Census, the main fieldwork for the IDHS was scheduled to take place May-August Training for the main survey was held in May 1991 in nine locations--medan, Palembang, Jakarta, Semarang, Surabaya, Kupang, Banjarmasin, Ujung Pandang, and Ambon. The training course lasted 15 working days and covered how to locate selected households, how to conduct interviews, and how to fill in control forms. Classroom lectures on the purpose of the questions, how to ask them, and how to record answers, were followed by mock interviews and finally by practice interviews in the field. A.4 FIELDWORK The IDHS data collection was carried out by 178 interviewers, 56 field supervisors, and 34 field editors. Each of the 56 teams consisted of two to four interviewers, one field editor, and one supervisor. As in the 1987 NICPS, the number of interviewers in a team was determined by the number of enumeration areas selected in the respective province, and due to the sensitive nature of the questions asked in the survey, female interviewers were used. For logistical and security reasons, all of the field supervisors were male. The teams worked together in each EA until is was completed and then moved on to the next EA. The teams used public transportation to move between sample points. Provincial statistical office staff and CBS headquarters staff made periodic visits to the field to monitor the work. Fieldwork began in May and was completed in July

7 A.5 DATA PROCESSING The first stage of data editing was done by the field editors who checked the completed questionnaires for completeness and accuracy. Field supervisors also checked the questionnaires. They were then sent to the central office in Jakarta where they were edited again and open-ended questions were coded. The data were processed using 11 microcomputers and ISSA (Integrated System for Survey Analysis). Data entry and editing were initiated almost immediately after the beginning of fieldwork. Simple range and skip errors were corrected at the data entry stage. Secondary machine editing of the data was initiated as soon as sufficient questionnaires had been entered. The objective of the secondary editing was to detect and correct, if possible, inconsistencies in the data. All of the data were entered and edited by September A brief report containing preliminary survey results was published in November

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