Distributions of IgE titers (kUA/l) among cases and controls for each aeroallergen and Ascaris. Threshold (horizontal dotted line) for a positive assay was 0.70 kUA/l. Numbers represent negatives. Red: cases and Black: controls. Geometric means of positive values (i.e., ≥0.70 kUA/l) are shown by horizontal lines and were for cases vs. controls, respectively – D. pteronyssinus, 41.2 vs. 2.69, p < 0.001; B. tropicalis 26.2 vs. 4.64, p < 0.001; American cockroach, 2.94 vs. 2.58, p = 0.411; cat, cases: 1.42 vs. 1.26, p = 1.000; grass, 2.36 vs. 3.61, p = 0.489; Aspergillus, 0.86 vs. 1.12, p = 1.000; Ascaris, 4.32 vs. 2.85, p = 0.149. Not shown: D. farinae, cases: 25.2 vs. 4.07, p < 0.001; German cockroach, 2.79 vs. 2.44, p = 0.650; dog, 2.32 vs. 1.11, p = 0.556; Alternaria, <0.70 vs. 0.92. ***: p < 0.001.