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Table 3 Risk factors for multiple chemical sensitivity in a multivariate logistic regression analysis

From: Epidemiological association between multiple chemical sensitivity and birth by caesarean section: a nationwide case-control study

Variable Adjusted† OR (95% CI) P value
Birth by caesarean section 6.15 (3.13–12.1) < 0.001
Occupational history
 Agricultural worker 4.79 (1.31–17.6) 0.018
 Cosmetics salesperson 2.31 (0.43–12.5) 0.332
 Shoe store clerk 2.46 (0.38–16.0) 0.348
 Healthcare worker 1.95 (0.84–4.50) 0.119
 Drugstore clerk 2.56 (0.54–12.1) 0.236
Pet ownership before MCS onset 1.56 (0.90–2.69) 0.115
Mouth breathing 1.69 (1.02–2.80) 0.043
Number of times of living in a house < 1 year-old 4.63 (1.54–14.0) 0.006
 0 1  
 1–2 0.96 (0.55–1.67) 0.880
  ≥ 3 4.29 (1.34–13.7) 0.014
Number of vaccinations in the past 10 years
 0 1  
 1–5 1.26 (0.69–2.31) 0.446
 6–10 1.37 (0.67–2.80) 0.383
  ≥ 11 5.33 (2.19–12.9) < 0.001
  1. Adjusted for sex, age, history of smoking, bronchial asthma, and allergic rhinitis
  2. Pets include dogs, cats, hamsters, rabbits, guinea pigs, ferrets, and birds but not animals kept for commercial purposes
  3. CI confidence interval, MCS multiple chemical sensitivity, OR odds ratio