Table 1.

Characteristics of the study group of greenhouse workers and reference group

	Unit	Greenhouse workers		Reference group
		All persons	With asthmaa	All persons	With asthmaa
Individuals	number	33	5	42	9
Age, mean, range	years	37.5	43.2	39.9	42.0
		20–57	28–54	15–57	29–57
Male	%	64	40	62	56
Current smoker	%	24	0	24	44
Asthma	%	15	100	21	100
Nasal allergy	%	24	80	36	78
Atopy	%	45	80	45	89
SAAc, average (median), range	mg/l	28.3	43.3	30.0	34.8
		(15.2)	(34.8)	(20.0)	(20.8)
		1.5–159	15.4–115	3.6–134	3.9–110
CRP, Average (median) range	mg/l	1.60	3.91	1.73	2.78
		(0.95)	(3.32)	(0.88)	(1.52)
		bd-13.3b	0.62–12.3	bd-8.1	0.35–8.1

^aindividuals with asthma and some also with chronic rhinosinusitis (crs)

^bbd: below detection limit, ^caverage and medians of 166 SAA and 217 CRP samples