Kappas and gross discrepancy rates (GDRs) for current tobacco use items in the PATH-RV Study
| Variable | Adults (n=407) | Youth (n=117) | ||
| Kappa | GDR (%) | Kappa | GDR (%) | |
| Current use of cigarettes | 0.94 | 2.5 | 1.00 | 0.0 |
| Current use electronic nicotine products | 0.88 | 1.5 | 0.64 | 4.3 |
| Current use of traditional cigars | 0.67 | 3.2 | 1.00 | 0.0 |
| Current use of cigarillos | 0.87 | 0.7 | 0.49 | 1.7 |
| Current use of filtered cigars | 0.56 | 1.5 | 1.00 | 0.0 |
| Current use of pipes | 0.83 | 0.5 | 1.00 | 0.0 |
| Current use of snus | 0.44 | 1.2 | 1.00 | 0.0 |
| Current use of a hookah | 0.50 | 1.0 | 1.00 | 0.0 |
| Current use of smokeless tobacco | 0.79 | 1.2 | 0.00 | 0.9 |
The GDR is the proportion of respondents giving different answers in the two interviews. Kappa is a measure of the agreement between answers in the two interviews; it is the proportional improvement in agreement levels over what would be expected by chance.
PATH-RV, Population Assessment of Tobacco and Health reliability and validity study.