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Table 6 Odds ratios of dermatologic symptoms according to exposure to hairdressing chemicals, training status and main tasks (n = 1,054)

From: The Effect of Work Characteristics on Dermatologic Symptoms in Hairdressers

Variable* Crude 95% CI Model I 95% CI Model II 95% CI
Exposure to chemicals
  No 1.00   1.00   1.00  
  Yes 0.82 0.55 - 1.21 0.91 0.56 - 1.47 0.89 0.53 - 1.49
Training status
  Master 1.00   1.00   1.00  
  Designer 1.62 1.10 - 2.38 1.31 0.77 - 2.22 1.22 0.68 - 2.19
  Staff 2.69 1.82 - 3.96 2.83 1.47 - 5.43 2.70 1.32 - 5.51
Main task
  Cutting 1.00   1.00   1.00  
  Permanent wave 0.97 0.62 - 1.52 0.93 0.57 - 1.51 0.89 0.53 - 1.49
  Dyeing/tinting 2.16 1.03 - 4.52 1.00 0.36 - 2.81 1.08 0.38 - 3.07
  Washing 2.36 1.64 - 3.39 2.14 1.32 - 3.47 2.03 1.22 - 3.37
  Drying 0.49 0.11 - 2.13 0.45 0.10 - 2.02 0.45 0.10 - 2.03
  1. *The total of each variable is not always 1,054 due to missing values.
  2. Odds ratio and 95% confidence intervals estimated using logistic regression model adjusted for age, gender, marital status, educational level, smoking status, weekly alcohol consumption, amount of regular exercise per week, perceived state of health.
  3. Odds ratio and 95% confidence intervals estimated using logistic regression model adjusted for age, gender, marital status, educational level, smoking status, weekly alcohol consumption, amount of regular exercise per week, perceived state of health, business type, exposure to hairdressing chemicals, personal protective equipment.