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Table 4 Prevalence (%) of symptoms and diseases by number of positive SPT reactions

From: Sensitization to airborne allergens among adults and its impact on allergic symptoms: a population survey in northern Vietnam

Symptoms or diseases Number of positive SPT reactions
0 1 2 ≥3 p-value*
(n = 353) (n = 72) (n = 50) (n = 58)
Ever asthma 5.4 12.5 6.0 6.9 0.176
Physician-diagnosed asthma 5.4 6.9 2.0 3.4 0.594
Asthma medicine 2.6 0 4.0 1.7 0.463
Asthma attack 0.9 2.8 4.0 3.4 0.197
Asthma hospitalization 2.0 2.8 2.0 1.7 0.973
Wheezing last 12 months 21.3 31.9 24.0 25.9 0.263
Recurrent wheeze 4.5 9.7 10.0 10.3 0.114
Allergic rhinitis 17.9 29.2 28.0 41.4 <0.001
AR symptoms last 12 months 14.5 25.4 28.0 36.2 <0.001
Intermittent AR 13.0 18.1 22.0 29.3 0.010
Persistent AR 4.0 7.1 6.0 12.1 0.080
Bronchial hyper-reactivity, PC20 ≤ 2 mg/ml 7.1 10.2 11.4 17.1 0.047
  1. * Difference (p-value) in prevalence of symptoms and diseases by number of positive SPT reactions.