Study population at step one: demography, prevalence of self-reported allergic rhinitis and asthma, the proportion which screened positive, and the proportion of subjects reporting specific symptoms
| Belgium | France | Germany | Italy | Spain | UK | All countries | |
| Total n | 1602 | 1606 | 1613 | 1600 | 1600 | 1625 | 9646 |
| Demographics | |||||||
| Age# | 45.7 (44.9–46.6) | 46.4 (45.5–47.2) | 45.4 (44.6–46.1) | 46.7 (45.8–47.5) | 44.3 (43.4–45.2) | 46.9 (46.0–47.8) | 45.9 (45.5–46.2) |
| Female | 863 (53.9; 51.4–56.3) | 839 (52.2; 49.8–54.7) | 850 (52.7; 50.2–55.2) | 839 (52.4; 50.0–54.9) | 818 (51.1; 48.6–53.6) | 965 (59.4; 57.0–61.8) | 5174 (53.6; 52.6–54.6) |
| Self-report of disease status | |||||||
| Self-aware of AR | 328 (20.5; 18.5–22.5) | 293 (18.2; 16.4–20.2) | 330 (20.5; 18.5–22.5) | 257 (16.1; 14.3–18.0) | 242 (15.1; 13.4–17.0) | 354 (21.8; 19.8–23.9) | 1804 (18.7; 17.9–19.5) |
| Physician-based diagnosis of AR | 222 (13.9; 12.2–15.6) | 208 (13.0; 11.3–14.7) | 261 (16.2; 14.4–18.1) | 178 (11.1; 9.6–12.8) | 182 (11.4; 9.9–13.0) | 214 (13.2; 11.6–14.9) | 1265 (13.1; 12.4–13.8) |
| Use of medication for AR | 190 (11.9; 10.3–13.5) | 181 (11.3; 9.8–12.9) | 198 (12.3; 10.7–14.0) | 145 (9.1; 7.7–10.6) | 143 (8.9; 7.6–10.4) | 226 (13.9; 12.3–15.7) | 1083 (11.2; 10.6–11.9) |
| Self-reported asthma | 98 (6.1; 5.0–7.4) | 96 (6.0; 4.9–7.3) | 71 (4.4; 3.5–5.5) | 76 (4.8; 3.8–5.9) | 94 (5.9; 4.8–7.1) | 181 (11.1; 9.6–12.8) | 616 (6.4; 5.9–6.9) |
| Screened positive at step 1 | 845 (52.7; 50.3–55.2) | 686 (42.7; 40.3–45.2) | 638 (39.6; 37.2–42.0) | 533 (33.3; 31.0–35.7) | 553 (34.6; 32.2–37.0) | 601 (37.0; 34.6–39.4) | 3856 (40.0; 39.0–41.0) |
| Symptoms | |||||||
| Blocked nose | 522 (32.6; 30.3–34.9) | 378 (23.5; 21.5–25.6) | 369 (22.9; 20.9–25.0) | 314 (19.6; 17.7–21.6) | 383 (23.9; 21.9–26.0) | 313 (19.3; 17.3–21.2) | 2279 (23.6; 22.8–24.5) |
| Runny nose | 548 (34.3; 32.0–36.6) | 421 (26.2; 24.1–28.4) | 322 (20.0; 18.1–22.0) | 276 (17.3; 15.4–19.1) | 274 (17.1; 15.3–19.0) | 295 (18.2; 16.3–20.0) | 2136 (22.2; 21.3–23.0) |
| Itchy nose | 480 (30.0; 27.8–32.3) | 378 (23.5; 21.5–25.6) | 249 (15.5; 13.7–17.3) | 254 (15.9; 14.1–17.7) | 316 (19.8; 17.8–21.7) | 225 (13.8; 12.2–15.5) | 1902 (19.7; 18.9–20.5) |
| Sneezing | 665 (41.7; 39.3–44.1) | 603 (37.5; 35.2–39.9) | 474 (29.4; 27.2–31.7) | 506 (31.6; 29.4–33.9) | 494 (30.9; 28.6–33.1) | 470 (28.9; 26.7–31.1) | 3212 (33.3; 32.4–34.3) |
| Itchy/runny eyes | 325 (32.0; 29.2–34.9) | 292 (34.0; 30.9–37.2) | 319 (42.9; 39.3–46.4) | 267 (40.8; 37.0–44.5) | 312 (47.1; 43.3–50.9) | 219 (32.1; 28.6–35.6) | 1734 (37.6; 36.2–39.0) |
Data are presented as n (%; 95% confidence interval) unless otherwise stated. AR: allergic rhinitis. #: mean