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Table 1 Characteristics for positive SPT with and without available obstetric data

From: Analysis of maternal and perinatal determinants of allergic sensitization in childhood

Variable Obstetric and pos. SPTa Pos. SPTb only P
Median IQR Median IQR
Age at test (years) 3.47 1.70–7.34 5.56 2.51–9.49 < 0.001*
n allergens tested 19 11–27 19 11–27 0.978*
Pos. allergens 4 2–7 4 2–8 0.213*
n pos. inh. allergens 2 0–3 2 1–4 0.019*
n pos. ing. allergens 2 0–5 2 0–5 0.616*
  n % n % P
Sex: male 171 59.8 191 55.4 0.336**
n SPTs per patient 0.145**
 1 193 67.5 256 74.2  
 2 51 17.8 52 15.1  
 3 24 8.4 18 5.2  
 4+ 18 6.4 19 5.5  
Children sensitized to inh. 195 68.2 265 76.8 0.013**
Children sensitized to ing. 210 73.4 241 69.9 0.309**
Cross-sensitized children 118 41.3 161 46.7 0.197**
  1. pos. positive, IQR interquartile range, inh. inhaled, ing. ingested, cross-sensitized, sensitized to both ing. and inh. allergens
  2. * Mann–Whitney U test; ** chi-square test
  3. a(n = 286); b(n = 345)