Association of vitamin D receptor gene polymorphisms and vitamin D levels with asthma and atopy in Cypriot adolescents: a case–control study

Table 1 Descriptive statistics for the study population

	NWNA (Controls) (n = 671)	CUW (Wheezers) (n = 190)	P value	CUWA (Active Asthmatics) (n = 69)	P value
Age (yrs)^a	17.0 (15.9–18.0)	17.0 (16.0–18.1)	0.360	16.9 (15.9–18.1)	0.549
Sex (% male)^b	40.5 %	43.1 %	0.517	43.5 %	0.626
Vitamin D levels (ng/ml)^a	22.9 (10.9–35.9)	22.9 (10.5–23.8)	0.946	21.1 (8.8–30.81)	0.017
Sensitization (% positive)^b	25.7 %	41.4 %	<0.001	52.0 %	<0.001
Rhinitis (% positive)^b	18.4 %	41.5	<0.001	57.4 %	<0.001
FVC (% predicted)^a	103.8 (72.7–135.9)	104.9 (77.1–148.3)	0.531	105.6 (78.0–153.6)	0.484
FEV1 (% predicted)^a	99.3 (69.6–125.3)	99.1 (72.9–130.5)	0.860	97.6 (62.0–125.6)	0.398

NWNA Never Wheezing Never Asthma, CUW Current Wheezing, CUWA Current Wheezing and Asthma
^aMean and 95 % CI, Independent sample t test for equality of means (2-sited significance)
^bPercentage, χ ² test (asymptomatic 2-sited significance)

ISSN: 2049-6958