| About BMI of Mother [message #26372] |
Tue, 14 March 2023 06:42  |
Endsofanias
Messages: 9
Registered: November 2022
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Member |
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Dear all, I am a new user of this database and for my analysis, I am using the KR file. So, I want to use the mother's BMI as one covariate I want to use along with others. But, I don't know where I missed it, I couldn't get the variable or the covariates "mother BMI" or Is that computed from other variables?. Anyone, please help me with the "mother BMI" from The KR file? my activity is stacked do this variable missing
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| Re: About BMI of Mother [message #29400 is a reply to message #29346] |
Tue, 11 June 2024 15:58  |
Janet-DHS
Messages: 880
Registered: April 2022
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Senior Member |
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Following is a response from DHS staff member, Tom Pullum:
You do not say what survey you are using, but usually the mother's BMI is v445 and it is included on the child's record. You do not need to do any merging. For children, the usual anthropometry measures are hw70, hw71, and hw72, from which the HAZ, WAZ, and WHZ are constructed. You can construct the BMI as weight divided by the square of height, rescaled with a factor that is a power of 10, but I would recommend using the Z scores. There have been several postings on the forum about how to get the HAZ (and a binary indicator of stunting) from hw70, etc.
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| Re: About BMI of Mother [message #29465 is a reply to message #29416] |
Mon, 24 June 2024 09:40 |
Janet-DHS
Messages: 880
Registered: April 2022
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Senior Member |
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Following is a response from DHS staff member, Tom Pullum:
The children's and women's heights and weights are measured during the household interview. The anthropometry scores are calculated from those measurements. When the IR and KR files are constructed, the measurements and scores are a copied in. The PR file includes some women who are not mothers and some children who are not living with their mothers, but those are cases for which the linkage you want to do is not possible.
In your analysis I suppose there is indeed some bias, in that you only include women who are mothers, and you only include children who mothers are alive and living with the child, but if you define your study population to consist of such combinations, which seems reasonable to me, then you are ok.
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