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Table 4 Exposure after the accident associated with occurrence of symptoms in the case-control analysis

From: Acute health effects after accidental exposure to styrene from drinking water in Spain

Factors Cases (n = 46) Controls (n = 38) Odds ratio* 95% confidence interval
Age (mean, range) 29.9, 8m-77yr 26.8, 8m-72yr 1.0 0.97–1.04
Sex (female/male) 23/23 17/21 1.3 0.4–4.2
Presence in the house between 10–13 December 42 32 1.9 0.2–24.3
Consumption of tap water 21 3 7.8 1.3–48.1
Consumption of food prepared with tap water 34 13 8.6 1.9–39.8
Shower/bath 41 24 1.6 0.4–7.7
Direct exposure to vapors from basement 34 18 10.4 2.3–47.4
Floor of the apartment (continuous)    0.7 0.5–0.96
  1. * Odds ratios are adjusted for the other variables shown in the table