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Home » Topics » Biomarkers » Diabetes in SADHS 2016 (how to adjust HbA1c level)
Diabetes in SADHS 2016 Mon, 08 June 2020 08:00
 Frankfeng Messages: 9Registered: September 2019 Member
Dear DHS team

I am using SADHS's household member dataset. There are variables named "final result hba1c for women (3 decimals implicit)" (shwhba1c) or "final result hba1c for men (3 decimals implicit)" (shmhba1c). In the SADHS report, An HbA1c value of ≥6.5% is treated as diabetes, and An HbA1c value between 5.7% and 6.4% classifies an individual as being pre-diabetic. I tried to recode but I cannot get the same percentages.

My questions are: 1. is "final result hba1c for women (3 decimals implicit)" an adjusted or a unadjusted hba1c?
2. If not, how I can adjust it? From the report, it says: "To adjust HbA1c measurements for this difference in specimen type, the following equation was used: venous = (DBS-0.228)/0.9866. " where I can get the DBS?

Or any other variables in SADHS contain such information?

Thank you.
Re: Diabetes in SADHS 2016 [message #19419 is a reply to message #19378] Mon, 15 June 2020 08:47
 Frankfeng Messages: 9Registered: September 2019 Member
Dear DHS team,

Thank you.
Re: Diabetes in SADHS 2016 [message #19428 is a reply to message #19419] Tue, 16 June 2020 17:36
 Liz-DHS Messages: 1516Registered: February 2013 Senior Member
Dear User, a response from Data Processing Expert, Guillermo Rojas:
Quote:

Since the decimals are implicit the adjustment for women should be:

(shwhba1c/1000 0.228)/0.9866

In the DHS report the table is for de-facto population HV103 = 1 with a complete individual interview HA65 = 1 and we are also excluding samples that were logged into the system more than 60 days or more. This information is available on request and the access key to that table is barcode variable SH274.

The same needs to be done for men, with the corresponding variables SHMHBA1C, HB65, and SH374.

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