Variable | Year | Supplement |
---|---|---|
COLSIGWHEN_A | 2021 | Sample adult questionnaire |
SIG2 | 2018 | Sample adult questionnaire |
SIG2 | 2015 | Sample adult cancer |
SIG2 | 2013 | Sample adult questionnaire |
SIG2 | 2010 | Sample adult cancer |
SIGWHEN_A | 2019 | Sample adult questionnaire |