Cluster 1 (‘low exposure’) | Cluster 2 (‘grass pollen’) | Cluster 3 (‘PM10’) | Cluster 4 (‘tree pollen’) | |||||
n (%) | 550 (51.7) | 327 (30.8) | 104 (9.8) | 82 (7.7) |
Median | P25-P75 | Median | P25-P75 | Median | P25-P75 | Median | P25-P75 | |
Average lag1-lag4 daily air pollution ATMO subindices (from 1 to 10)* | ||||||||
PM10 | 4 | 3–5 | 3 | 3–3 | 6 | 4–7 | 4 | 3–6 |
NO2 | 3 | 3–3 | 2 | 2–3 | 3 | 3–3 | 3 | 3–3 |
O3 | 3 | 2–3 | 4 | 3–5 | 3 | 3–3 | 4 | 4–4 |
Average lag1-lag4 daily pollen concentration (in grain/m3) | ||||||||
Alder | 0 | 0–0 | 0 | 0–0 | 23.4 | 16.8–41.1 | 1.6 | 0.8–2.5 |
Ash | 0 | 0–0 | 0 | 0–1.0 | 1.6 | 0.4–2.8 | 33.9 | 26.7–126.6 |
Birch | 0 | 0–0 | 0.2 | 0–1.6 | 0.2 | 0–1.0 | 174.5 | 36.1–269.1 |
Cypress | 0 | 0–0 | 4.9 | 3.1–7.6 | 70.6 | 34.9–131.4 | 15.2 | 8.4–32.9 |
Grasses | 0 | 0–0 | 19.9 | 6.8–38.6 | 0 | 0–0.2 | 0.8 | 0.4–1 |
Hazel | 0 | 0–0 | 0 | 0–0 | 12.1 | 4.5–20.5 | 0 | 0–0.4 |
Oak | 0 | 0–0 | 2.7 | 0–17.2 | 0 | 0–0 | 2.1 | 0.6–48.7 |
Plane-tree | 0 | 0–0 | 0.2 | 0–3.7 | 0 | 0–0 | 153.9 | 1.0–252.3 |
Poplar | 0 | 0–0 | 0 | 0–0.4 | 5.6 | 0.8–14.5 | 6.6 | 4.3–13.7 |
Daily total concentration | 0 | 0–1.4 | 113.5 | 60.6–176.1 | 154.4 | 92.5–250.2 | 509.5 | 428.2–666.4 |
Season of health check-up, n (%) | ||||||||
Spring | 29 (5.3) | 233 (71.3) | 15 (14.4) | 82 (100.0) | ||||
Summer | 41 (7.4) | 94 (28.7) | 0 (0.0) | 0 (0.0) | ||||
Autumn | 287 (52.2) | 0 (0.0) | 0 (0.0) | 0 (0.0) | ||||
Winter | 193 (35.1) | 0 (0.0) | 89 (85.6) | 0 (0.0) |
P25: 25th percentile, P75: 75th percentile.
*1: no or low level of pollution, 10: very high level of pollution.
NO2, nitrogen dioxide; O3, ozone; PM10, particulate matter with aerodynamic diameter <10 µm.