The reliability of a self-report of physician-diagnosed gout in the Campaign Against Cancer and Heart Disease (CLUE II) cohort, based on the κ statistic.
| Characteristics | Questionnaires | ||
|---|---|---|---|
| 2000 | 2003 | 2007 | |
| No. participants | 12,797 | 9296 | 6873 |
| Participants reporting gout (%) | 609 (4.8) | 523 (5.6) | 393 (5.7) |
| Participants reporting their gout status in 2000 and on the subsequent questionnaire | 437 | 271 | |
| Participants reporting gout in 2000 and on the subsequent questionnaire | — | 326 | 197 |
| Reliability, % (κ) | — | 75 (0.73)* | 73 (0.63)* |
| Participants reporting their gout status in 2003 and on the 2007 questionnaire | — | — | 277 |
| Participants reporting gout in 2003 and on the 2007 questionnaire | — | — | 225 |
| Reliability, % (κ) | — | — | 81 (0.70)* |
↵* p < 0.001.