Table 1.
Descriptive statistics on pollen and fungal spore levels, Brussels-Capital Region, 2008–2013
| Taxa | Aeroallergen seasona | Number of days included in the analyses | Daily concentrations within the defined aeroallergen season (grains or spores/m3) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Mean | S.D. | Min | P25 | P50 | P75 | Max | |||
| Alder | January–April | 722 | 16 | 48 | 0 | 0 | 1 | 9 | 598 |
| Hazel | January–April | 722 | 6 | 18 | 0 | 0 | 1 | 4 | 207 |
| Yew Cupressaceae | February–April | 536 | 65 | 195 | 0 | 1 | 9 | 50 | 2595 |
| Ash | February–May | 722 | 16 | 76 | 0 | 0 | 0 | 4 | 1265 |
| Hornbeam | March–May | 552 | 4 | 23 | 0 | 0 | 0 | 1 | 387 |
| Birch | March–May | 552 | 82 | 230 | 0 | 0 | 3 | 40 | 1933 |
| Oak | April–May | 366 | 36 | 89 | 0 | 0 | 2 | 22 | 560 |
| Plantain | April–September | 1098 | 0 | 1 | 0 | 0 | 0 | 0 | 10 |
| Grass | April–September | 1098 | 14 | 26 | 0 | 0 | 3 | 12 | 205 |
| Mugwort | June–September | 732 | 1 | 2 | 0 | 0 | 0 | 1 | 21 |
| Alternaria | January–November | 2006 | 57 | 148 | 0 | 0 | 10 | 40 | 1985 |
| Cladosporium | January–November | 2006 | 2731 | 4519 | 0 | 250 | 970 | 3213 | 43230 |
Note: a Months for which the probability that the concentration is higher than 1% of the maximum concentration is different from zero