Relationships between aeroallergen levels and hospital admissions for asthma in the Brussels-Capital Region: a daily time series analysis

Table 1 Descriptive statistics on pollen and fungal spore levels, Brussels-Capital Region, 2008–2013

Taxa	Aeroallergen season^a	Number of days included in the analyses	Daily concentrations within the defined aeroallergen season (grains or spores/m³)
Taxa	Aeroallergen season^a	Number of days included in the analyses	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

ISSN: 1476-069X