Comparison of demographic and self-reported characteristics between subjects who were scored positive at step one and who attended or did not attend step two of the study
| Patients who did not attend step two of the study | Patients who attended step two of the study | Total n | Risk of attending study at step two OR (95% CI) | |
| Patients n | 3131 | 725 | 3856 | |
| Age# | 42.6 | 40.4 | 3846 | 0.992 (0.987–0.997)¶ |
| Females | 1759 (56.2) | 354 (48.8) | 3856 | 0.744 (0.633–0.875) |
| Self-aware of AR | 1418 (45.3) | 386 (53.2) | 3856 | 1.376 (1.170–1.617) |
| Physician-based diagnosis of AR | 978 (31.2) | 287 (39.6) | 3856 | 1.442 (1.221–1.705) |
| Medication use for AR | 822 (26.3) | 261 (36.0) | 3856 | 1.580 (1.331–1.875) |
| Persistent allergic rhinitis | 615 (20.1) | 191 (26.8) | 3776 | 1.453 (1.204–1.753) |
| Disease duration ≤5 yrs+ | 510 (36.2) | 130 (33.8) | 1794 | 0.899 (0.709–1.140) |
| Runny nose | 1547 (49.4) | 460 (63.4) | 3856 | 1.777 (1.505–2.100) |
| Blocked nose | 1521 (48.6) | 438 (60.5) | 3852 | 1.618 (1.372–1.908) |
| Itchy nose | 1392 (44.5) | 401 (55.4) | 3850 | 1.547 (1.314–1.820) |
| Sneezing | 2208 (70.6) | 533 (73.7) | 3852 | 1.170 (0.975–1.405) |
| Itchy/runny eyes | 1360 (47.0) | 374 (54.0) | 3588 | 1.328 (1.125–1.569) |
| Number of symptoms | 2.8 | 3.2 | 3575 | 1.327 (1.239–1.421)§ |
Data presented as n (%) unless otherwise stated. OR: odds ratio; CI: confidence interval; AR: allergic rhinitis. #: mean; ¶: change in odds OR for one additional year; +: disease duration available only for subjects self-aware of AR; §: change in OR for one additional symptom