Table 3.

Prevalence of sensitization to specific inhalant allergens by cluster, NHANES 2005–2006

Sensitization to inhalant allergens	Cluster 1	Cluster 2	Cluster 3	P-value	All participants
Any inhalant allergen	43.8	44.2	43.1	0.79	43.8
Any dust mite	22.1	15.8	24.1	< 0.001	19.6
Der f1	21.2	13.9	21.5	< 0.001	17.7
Der p1	20.7	14.5	21.7	< 0.001	18.0
Any pet allergen	14.9	16.6	14.9	0.50	15.7
Dog	12.0	12.0	11.2	0.84	11.7
Cat	11.3	13.1	11.0	0.42	12.1
Any plant or grass allergen	30.7	29.5	21.7	< 0.001	27.2
Ragweed	18.2	16.1	13.3	0.06	15.6
Rye grass	22.8	20.4	16.8	0.0078	19.7
Bermuda grass	16.8	16.6	12.5	0.0044	15.3
Oak	13.1	11.3	10.0	0.051	11.2
Birch	10.8	10.2	9.0	0.43	9.9
Thistle	12.8	11.8	9.3	0.053	11.2
Any mold allergen	10.3	11.0	10.9	0.85	10.9
Alternaria alternata	8.6	9.1	7.5	0.19	8.5
Aspergillus fumigatus	6.3	6.3	7.0	0.66	6.5
Any rodent allergen	1.8	1.7	2.3	0.36	2.0
Mouse	1.4	0.9	1.2	0.63	1.1
Rat	1.0	1.3	2.1	0.0018	1.5
Cockroach allergen	11.8	7.7	12.2	0.0027	9.9

Abbreviations: Der f Dermatophagoides farinae; Der pDermatophagoides pteronyssinus. P-value for difference in prevalence between clusters calculated using chi-square test