Hello, I am analuyzing HIV testing trends using the NHIS.
Since my interest is on African born persons versus those born in Latin America, I have decided to pool the data over the years 2000 to 2015 to increase the sample size.
When I apply my weights, should i divide it by 15? that is PERWEIGHT/15 or SAMWEIGHT / 15?
Secondly, my dataset include socio-demographic variables (that were asked of all respondents), and other health behavior related variables (including those on HIV testing, mental health) that were asked of only adults. Given that my one of my main outcome variables is HIV testing, should I be using the Sample weights (SAMWEIGHT) instead of PERWEIGHT?
After extraction, I realized that I have a number of variables with NIU (not in universe codes)? The question on HIV testing for example, has close to 67% of the sample not in universe, because they were asked of only adults.
– Should I delete these NIU cases from the data before doing any analysis?
– Does restricting my analysis to only those aged 18+ achieve the same result ?
Thanks in advance for all your assistance.