Table 2.

Main demographic data, clinical characteristics and lung function parameters of patients

		Study population
N	%
Number of patients		12743	100
Number of cases in regions of Hungary	East	5149	40.4
	West	3984	31.3
Central	3610	28.3
Examined patients according to seasonality	April–September	6923	54.3
October–March	5820	45.7
Years since the diagnosis of asthma	0–1 years	310	2.4
	2–5 years	3280	25.7
	6–10 years	3295	25.9
	11–20 years	3930	30.8
	>20 years	1913	15.0
No data	15	0.1
GINA based treatment categories	STEP 1	274	2.15
	STEP 2	990	7.77
	STEP 3	4759	37.35
	STEP 4	6390	50.14
STEP 5	330	2.59
Gender	Male	4059	31.9
Female	8684	68.1
Smoking habit	Smoker	1669	13.1
	Former smoker	2584	20.3
	Never smoked	8476	66.5
No data	14	0.1
Age distribution	18–30	1261	9.9
	31–45	2466	19.4
	46–65	5687	44.6
>65	3329	26.1
Body mass index distribution	<18.5	228	1.8
	18.5–24.9	3453	27.1
	25–29.9	4487	35.2
	30–34.9	3009	23.6
≥35	1566	12.3
FEV1 (forced expiratory volume in 1 s, % predicted) distribution	>80%	7527	59.1
	60–80%	3399	26.7
	<60%	1461	11.5
No data	356	2.8

Abbreviation: GINA, global initiative for asthma.