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Table 2 Clinical data and diagnoses

From: Exposure to high endotoxin concentration increases wheezing prevalence among laboratory animal workers: a cross-sectional study

Variables Total n = 751 Exposed group n = 412 Non-exposed group n = 339 p value
Skin prick test     
 Commom allergen (s) 333 (44.3 %) 176 (42.7 %) 157 (46.3 %) 0.269
 Occupational allergen (s) 77 (10.2 %) 68 (16.5 %) 9 (2.6 %) <0.001*
Smoking 129 (17.1 %) 72 (17.4 %) 57 (16.8 %) 0.811
Spirometry (normal) 715 (94.7 %) 389 (94.4 %) 326 (96.1 %) 0.265
Self-reported asthma 88 (12.0 %) 48 (11.6 %) 40 (11.8 %) 1.00
Confirmed asthma 73 (10 %) 42 (10 %) 31 (9 %) 0.71
Wheezing 163 (21.7 %) 96 (23.3 %) 67 (19.7 %) 0.24
BHRa 95 (12.9 %) 57 (14.0 %) 38 (11.5 %) 0.31
Past exposure to laboratory animals 240 (32 %) 168 (70 %) 72 (30 %) <0.001*
Pet owning history 485 (64.6 %) 258 (53.2 %) 227 (46.8 %) 0.22
  1. Results are expressed as median (interquartile range) or n (%). *chi-square test. BHR bronchial hyperresponsiveness
  2. a16 subjects did not undergo bronchial challenge test, 6 in the exposed group and 10 in the non-exposed group