Home » Data » IPUMS Demographic and Health Surveys (IPUMSDHS) » IPUMSDHS Tip #3: Use POPWT to estimate the number of people with a characteristic
IPUMSDHS Tip #3: Use POPWT to estimate the number of people with a characteristic [message #15269] 
Fri, 22 June 2018 15:00 
kingx025
Messages: 95 Registered: August 2016 Location: Minneapolis. Minnesota

Senior Member 


Most DHS users know that they need to use weights with DHS data to get reliable estimates of the proportion of people with a given characteristic. The weights included in the DHS samples adjust for factors such as oversampling small regions and weight up to the total number of people sampled by the survey.
Sometimes you'd like to know the total number (or count) of people in a country who have a given characteristic. Knowing the absolute number of people with some characteristic helps policymakers budget and plan for the future. To calculate the number of household members with a given characteristic, you can use the IPUMSDHS variable POPWT, an expansion factor. For example, POPWT could be used as to find the number of people in Tanzania in 2015 that slept under an insecticidetreated bednet the night before the survey.
POPWT, the IPUMSDHS expansion factor for household members, is calculated using the DHS household weight (HV005) and population figures from the United Nations Population Division. POPWT gives estimates subject to the same margin of error as the original household weight. POPWT is currently available for only household members (variables from the PR files) but will soon be available for women of childbearing age (the IR files) as well.
For more information about the construction of POPWT, see the User Note about the expansion factor:
https://www.idhsdata.org/idhs/population_weights.shtml
Miriam King
Dr. Miriam King
IPUMSDHS Project Manager (www.idhsdata.org)




Re: IPUMSDHS Tip #3: Use POPWT to estimate the number of people with a characteristic [message #27497 is a reply to message #27495] 
Tue, 22 August 2023 12:42 
gcorcora
Messages: 2 Registered: June 2019 Location: Minneapolis, Minnesota

Member 


Dear Gonzalo Barreix,
I can answer your question for Miriam, as I wrote the code for POPWT.
For expanding children under 5 in the Mozambique MIS 2018 survey, you will want to use the first of the two methods you mentioned.
Specifically, using the MIS 2018 Mozambique KR file compute:
KTWT= (v005/(sum of 2018 under age 5 in sample))*(2018 under age 5 Mozambique population)
I hope this helps! Please respond here if you have any further questions
Gretchen Corcoran
Gretchen Corcoran
IPUMSDHS Data Analyst III (https://idhsdata.org)




Re: IPUMSDHS Tip #3: Use POPWT to estimate the number of people with a characteristic [message #27515 is a reply to message #27499] 
Mon, 28 August 2023 12:53 
gcorcora
Messages: 2 Registered: June 2019 Location: Minneapolis, Minnesota

Member 


Hi Gonzalo,
Great question! We used UN population numbers to calculate the population counts, which are only available in 5 year increments. Unfortunately that means there is no number available for population under age 1, so the second method (v005i/(sum of 2018 age 0 in sample))*(2018 age 0 Mozambique population) for children i age 0 isn't feasible unless you were able to get the numbers elsewhere. Thus the 1st method, (v005i/(sum of 2018 under age 5 in sample))*(2018 under age 5 Mozambique population) for children i age 0 is the option that would work with the data available.
Let me know if the above isn't clear or you have any further questions.
Thanks!
Gretchen Corcoran
Gretchen Corcoran
IPUMSDHS Data Analyst III (https://idhsdata.org)





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