Serum and Salivary IgE, IgA, and IgG₄ Antibodies to Dermatophagoides pteronyssinus and Its Major Allergens, Der p1 and Der p2, in Allergic and Nonallergic Children

Table 1

Demographic and clinical characteristics of the study subjects.

Characteristics	Groups
	Allergic	Nonallergic	𝐏 value
Number of subjects	72	14	—
Age (yr)	10.0±3.1	10.6±2.6	N.S.^a
Mean ± SD
Sex (M : F)	42 : 30	9 : 5	N.S.^a
Clinical diagnosis (𝑛, %)
Rhinitis	51 (71%)	0	<0.0001^b
Rhinitis and asthma	21 (29%)	0	<0.0001^b
Positive skin prick test (𝑛, %)^§
Dermatophagoides pteronyssinus	72 (100%)	0	<0.0001^b
Dermatophagoides farinae	69 (96%)	0	<0.0001^b
Blomia tropicalis	53 (74%)	0	<0.0001^b
Blattella germanica	31 (43%)	0	0.0015^b
Periplaneta americana	22 (31%)	0	0.0168^b
Alternaria alternata	10 (14%)	0	N.S.^b
Felis domesticus	27 (37%)	0	0.0039^b
Canis familiaris	37 (52%)	0	0.0002^b

^§ Skin prick test to aeroallergen extracts was considered positive for a mean diameter of wheal size larger than 3 mm than negative control (saline diluent); N.S: nonsignificant.
^aDetermined by the Student 𝑡-test.
^bDetermined by the Fisher exact test.