Table 1. Clinical characteristics of the study subjects.

	NPT-positive group (n=39)	NPT-negative group (n=21)	P value
Age (year)	30.92±10.94	36.67±12.78	0.073
Sex (male/female)	15/24	13/8	0.107
Positive SPT result to D. farinae (%)	38/39 (97.4)	17/21 (80.1)	0.002
AR vs AR with BA	27/12	18/3	0.218
Serum total IgE* (IU/mL)	370.18±412.33	478.00±1,095.68	0.585
Serum specific IgE to D. farinae* (kU/L)	29.79±37.27	2.63±8.03	<0.001
Total nasal symptom scores before NPT	11.59±9.49	6.81±7.33	0.043
Total nasal symptom scores after NPT	19.92±8.1	7.52±8.27	<0.001

All data are expressed as mean±SD.

^*Detected by using the ImmunoCAP method.

SPT, skin prick test; D., Dermatophagoides; AR, allergic rhinitis; BA, bronchial asthma; NPT, nasal provocation test.