| Variable | Year | Supplement |
|---|---|---|
| COUGH | 1994 | AIDS knowledge and attitudes |
| COUGH | 1992 | AIDS knowledge and attitudes |
| COUGH | 1991 | AIDS knowledge and attitudes |
| COUGHSN | 1990 | AIDS knowledge and attitudes |
| COUGHSN | 1989 | AIDS knowledge and attitudes |
| COUGSNEZ | 1988 | AIDS knowledge and attitudes |
| GACOUGH | 1993 | AIDS knowledge and attitudes |
| SNEEZON | 1987 | AIDS knowledge and attitudes |