| Variable | Year | Supplement |
|---|---|---|
| AHCHOME | 1999 | Sample adult questionnaire |
| CHM_USEM | 2012 | Child complementary and alternative medicine |
| CHOM_USM | 2017 | Sample child questionnaire |
| HOM | 2007 | Child complementary and alternative medicine |
| HOM_USEM | 2012 | Alternative health |
| HOM_USEM | 2007 | Alternative health |
| HOM_USEM | 2002 | Alternative health |
| HOM_USM1 | 2017 | Sample adult questionnaire |