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Home » Topics » Mortality » Weighting Total Pregnancies Data - Stillbirth value is reducing (Association between unintended pregnancies (unwanted & mistimed), and stillbirth among women aged 15-49 in Zambia )

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Weighting Total Pregnancies Data - Stillbirth value is reducing [message #26800]

Tue, 02 May 2023 17:22

Shadrick Kayeye
Messages: 13
Registered: February 2023

Member

Hi,

Kindly help! I have managed to calculate the number of stillbirth for Zambia in line with the ZDHS 2018 report using SPSS. The challenge however is that once I compute the the sample size which is the total # women who have had pregnancies of 7 months (births + stillbirths) or more and weight it (which matches with the ZDHS report= 9869 from about 13500), this automatically affects the number of stillbirths and increases them to 200 from the accurate 119.I am failing to figure out where I am going wrong. Kindly guide, I have attached the outputs and syntax commands for reference. Your prompt feedback will be greatly appreciated.

Regards
Shadrick

Attachment: example4 (2).sps
(Size: 3.91KB, Downloaded 135 times)
Attachment: Output6.spv
(Size: 53.73KB, Downloaded 265 times)
Attachment: Output9.spv
(Size: 101.27KB, Downloaded 255 times)

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Re: Weighting Total Pregnancies Data - Stillbirth value is reducing [message #26832 is a reply to message #26800]

Fri, 05 May 2023 14:29

Janet-DHS
Messages: 880
Registered: April 2022

Senior Member

Following is a response from DHS staff member, Tom Pullum:

As you know, weighted and unweighted subtotals are usually different. But the difference between 119 and 200 is probably too large to be explained that way.

A pregnancy of 7+ months is a B or T preceded by 6 or more months of P. Could it be that you are using a 7 rather than a 6 for the preceding number of Ps? I cannot go through your SPSS code but that's my suspicion.

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