Status:Closed    Asked:Apr 06, 2015 - 02:08 PM

How to interpret NIU for sampweight questions

I'm using the online analyzer tool and trying to fill in the blank in this sentence. "In 2013, TK% of adults in the US had their cholesterol checked by a medical professional."

So I put cholchek1yr as the row, year as the column, and sampweight as the weight. That gave me NIU 23.6%, No 27.5%, Yes 46.8% and some small percentages as unknown. Now this is a question that was asked to all sample adults right?

Does that mean I should exclude the NIU responses and scale the rest up so that Yes would be .468/(.275+.468) ?

Or is the right answer that 46.8% of adults had their cholesterol checked?

A bit confused about how these studies work.

Thanks so much,


Do you have the same question? Follow this Question

Staff Answer




You should exclude the NIU responses. Since you are using SAMPWEIGHT, and non-sample adults have SAMPWEIGHT=0, the NIU observations above consist entirely of respondents under the age of 18.

Notice that if you add a Selection Filter of "age(18-*)" to your table, it will drop all of the NIU observations and nothing else. Equivalently, you could instead add a Selection Filter of "cholchek1yr(1-*)" to explicitly exclude NIU observations. The '*' in my filters can be used in SDA to signify the highest (or lowest) valid value.

Hope this helps.


Apr 07, 2015 - 01:58 PM

Report it


I am getting strange numbers for NIU persons in the sixties, especially 1962-...
Health Insurance Unit in ACS versus MEPS
Login   |   Register

Recently Active Members

View More »

Share |