| Variable | Year | Supplement |
|---|---|---|
| CCO_USEM | 2012 | Child complementary and alternative medicine |
| CCO_USEM | 2007 | Child complementary and alternative medicine |
| CHIRO | 2022 | In both sample adult and child questionnaires |
| CHP_USEM | 2002 | Alternative health |
| COM_USEM | 2012 | Alternative health |
| COM_USEM | 2007 | Alternative health |