survey weights

[Sa Fe]

Hi,
I'm using the NHANES dataset from 2007 to 2017, and I want to use the sampling weights. However, NHANES mentions that the weights have to be used starting 2011. So, a subsample of my dataset needs to take the weights on. I'd appreciate any insight into how I can do this.

ps: I'm pretty much new to the survey datasets. I'd appreciate relatively comprehensive explanations.

Thanks,

[Ken Chui]

Even in the 2007 data, variables that are needed for complex survey weight adjustment are available in the DEMO file (see https://wwwn.cdc.gov/Nchs/Nhanes/2007-2008/DEMO_E.htm):

• WTINT2YR - Full Sample 2 Year Interview Weight
• WTMEC2YR - Full Sample 2 Year MEC Exam Weight
• SDMVPSU - Masked Variance Pseudo-PSU
• SDMVSTRA - Masked Variance Pseudo-Stratum

If you are pretty much new to the survey data, then check out the tutorial series made by NHANES. For example, this one: https://wwwn.cdc.gov/nchs/nhanes/tutorials/default.aspx.

And if you are combining data across years, definitely check out the technical documentation for analysts. And don't be hesitant to send them an e-mail if you have any question. For example, they can probably quickly tell you how to re-compute the weight variables to reflect that you are using multiple cycles, etc.