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Field teams, interviewer IDs, health investigators [message #22784] |
Mon, 10 May 2021 05:28 |
Richard H.
Messages: 3 Registered: May 2021
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Member |
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Dear all,
I'm a doctoral student currently working on a research project in which I would like to investigate to what degree variation in biomarker measurements is depending on interviewers. Therefore, I had planned to work with the interviewer IDs, but got confused on how to read them. Any help on the following three questions/observations would be greatly appreciated.
1. Were field teams assigned randomly to households within primary sampling units?
2. In the project report I have read that in total 789 field teams were deployed to conduct all interviews/measurements. Paragraph 1.7 states that each field team consisted of 1 supervisor, 3 female interviewers, 1 male interviewer and 2 health investigators. In total, this would mean that 789*4=3156 interviewers and 2*789=1578 health investigators were involved. However, the variable hv018 (=interviewer ID) only contains 523 unique values, so I would assume that this is actually the field team ID. But since 523 is not equal to 789 I'm very confused about the interviewer ID. What does it actually depict?
3. Who took blood pressure measurements? The health investigators or the interviewers? I saw that it is documented which health investigator took the blood sample for HIV testing, but couldn't find the same info for blood pressure. Is there even any way to tell who took the blood pressure measurements (this is what I'm mainly working with)?
Thanks a lot in advance for any help with this.
Best regards,
Richard
[Updated on: Thu, 13 May 2021 07:42] Report message to a moderator
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Re: Field teams, interviewer IDs, health investigators [message #22854 is a reply to message #22784] |
Mon, 24 May 2021 10:46 |
Bridgette-DHS
Messages: 3190 Registered: February 2013
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Senior Member |
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Following is a response from Senior DHS Specialist, Fred Arnold:
1. The field teams were not assigned completely randomly to the sample households. The supervisor on each team assigned interviewers and health investigators to sample households. Although in some cases they were assigned randomly, they also took into account such factors as the experience and ability of the field workers, the availability of the fieldworkers and the location of the households.
2. The interviewer numbers are not unique throughout the whole country. In NFHS-4 there were 14 field agencies that were assigned to one or more states and union territories. The interviewer numbers are unique within an assigned state or union territory, so to get a unique number throughout the country, you need to combine the state or union territory number with the interviewer number. The only problem you may have is in Uttar Pradesh and Madhya Pradesh. Each of those states were split into regions for implementation of the fieldwork (three regions in Uttar Pradesh and two regions in Madhya Pradesh). Those regions were assigned to different field agencies, so the interviewer numbers may be unique within each region, but not for the state as a whole.
3. The blood pressure measurements and all of the other biomarker measurements in each household were assigned to one of the two health investigators on the team.
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