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BMI India 2015 [message #21644] Wed, 02 December 2020 11:54 Go to next message
marcocolleoni is currently offline  marcocolleoni
Messages: 2
Registered: December 2020
Member
Dear all,

I am new to this but maybe you can help me with the following issue.

I'm using the body mass index from the Indian survey of 2015 as my outcome variable.
However, in my sample selection it seems to range from 1204 to 5606, which is pretty unlikely to be true.
Has some of you encountered a similar problem? What do you think the problem can be: should there be a decimal point?

Re: BMI India 2015 [message #21646 is a reply to message #21644] Wed, 02 December 2020 16:15 Go to previous messageGo to next message
Bridgette-DHS is currently offline  Bridgette-DHS
Messages: 2400
Registered: February 2013
Senior Member

Following is a response from DHS Research & Data Analysis Director, Tom Pullum:

Many DHS variables are multiplied by some factor just to get rid of a decimal point. The BMI, like the HAZ, WAZ, and WHZ, is multiplied by 100. To get to the correct scale, you need to divide by 100. There may be some extreme values of the BMI that are implausible or even impossible, reflecting possible measurement or coding errors in height or weight. v445 is coded 9998 for flagged values but there are long tails on both the low and high ends of the distribution and you may want to set more conservative boundaries for the plausible range.

Re: BMI India 2015 [message #21647 is a reply to message #21646] Wed, 02 December 2020 18:39 Go to previous message
marcocolleoni is currently offline  marcocolleoni
Messages: 2
Registered: December 2020
Member
Dear Tom,

Thank-you for the clarification. Much appreciated.
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