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Table 6 Rate ratios (RR) Ostrava east/other regions

From: Comparison of child morbidity in regions of Ostrava, Czech Republic, with different degrees of pollution: a retrospective cohort study

  O. south O. center O. west
Age 0 to 2 years RR P 95% CI RR P 95% CI RR P 95% CI
URI 0.69 <0.0001 0.61 – 0.79 0.45 <0.0001 0.39 – 0.52 0.44 <0.0001 0.38 – 0.52
Bronchitis - NS - - NS - - NS -
Tonsillitis 0.19 <0.0001 0.14 – 0.25 0.16 <0.0001 0.11 – 0.22 0.11 <0.0001 0.08 – 0.16
Viral illnesses 0.30 <0.0001 0.28 – 0.38 0.23 <0.0001 0.17 – 0.30 0.27 <0.0001 0.21 – 0.35
Laryngitis/tracheitis - NS - - NS - 0.53 0.005 0.34 – 0.83
Intestinal infections 0.33 <0.0001 0.25 – 0.43 0.25 <0.0001 0.18 – 0.35 0.18 <0.0001 0.14 – 0.28
Otitis media - NS - - NS - - NS -
Pneumonia 0.1 0.001 0.05 – 0.22 0.31 0.001 0.15 – 0.64 - NT -
Age 2–5 years RR P 95% CI RR P 95% CI RR P 95% CI
URI - NS - 0.62 <0.0001 0.53 – 0.73 0.76 <0.0001 0.65 – 0.88
Bronchitis - NS - - NS - - NS -
Tonsillitis 0.40 <0.0001 0.32 – 0.50 0.24 <0.0001 0.18 – 0.32 0.27 <0.0001 0.20 – 0.35
Viral illnesses 0.28 <0.0001 0.22 – 0.35 0.24 <0.0001 0.18 – 0.31 0.22 <0.0001 0.17 – 0.29
Laryngitis/tracheitis 1.88 <0.0001 1.33 – 2.65 1.98 <0.0001 1.36 – 2.89 - NS -
Intestinal infections 0.51 <0.0001 0.38 – 0.69 0.24 <0.0001 0.16 – 0.35 0.22 <0.0001 0.15 – 0.33
Otitis media - NS - - NS - - NS -
Pneumonia - NS - - NS - - NS -
  1. CI, Confidence interval; NS, P > 0.05, NT, Not tested. Negative binomial regression, 1444 children living in the region where they were born up to the age of 2 or 5 years.
  2. The RRs were adjusted for gender, type of delivery, neonatal icterus treated with phototherapy, year of birth, breastfeeding, maternal age and education, atopic dermatitis, smoking of the mother, exposure to environmental tobacco smoke, having an older sibling, allergy of an older sibling, type of flat (1st year), households with a gas appliance and mold in the flat in the 1st year of life, and in the older age also for wheezing and allergic rhinitis.