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Table 2 Demographic and clinical characteristics of the study population at the time of onset of first wheezing episode

From: Genetic polymorphisms and risk of recurrent wheezing in pediatric age

Characteristic Control group (n = 119) Children with wheezing (n = 119) P-value Children with non-recurrent wheezing (n = 45) Children with recurrent wheezing (n = 74) P-value
Females, n (%) 43 (36.1) 43 (36.1) 1.00 16 (35.6) 27 (36.5) 0.92
Median age (range), months 6 (0.3-12) 6 (0.3-12) 1.00 6 (0.3-12) 6 (0.3-12) 1.00
Caucasians, n (%) 113 (95.0) 113 (95.0) 1.00 42 (93.3) 71 (95.9) 0.67
Median gestational age (range), weeks 38.3 (37-41) 38.1 (37-41) 0.97 38.2 (37-41) 37.6 (37-40) 0.94
Subjects breastfed ≥3 months, n (%) 82 (68.9) 73 (61.3) 0.27 29 (64.4) 44 (59.5) 0.72
Subjects regularly using pacifier, n (%) 30 (25.2) 31 (26.1) 1.00 10 (22.2) 21 (28.4) 0.59
Subjects with at least one older sibling, n (%) 28 (23.5) 33 (27.7) 0.55 12 (26.7) 21 (28.4) 0.99
Subjects exposed to cigarette smoke, n (%) 55 (46.2) 79 (66.4) 0.002 26 (57.8) 53 (71.6) 0.17
Subjects with high IgE levels, n (%) 11 (9.2) 76 (63.9) <0.001 24 (53.3) 52 (70.3) 0.09
Subjects with a family history of atopy, n (%) 24 (20.2) 85 (71.4) <0.001 24 (53.3) 61 (82.4) 0.001