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Table 4 Regression analysis between respiratory symptoms/illnesses adjusted with age, duration of work and smoking

From: Respiratory symptoms and illnesses related to the concentration of airborne particulate matter among brick kiln workers in Kathmandu valley, Nepal

Symptoms/illnesses OR (95% C.I.) AOR (95% C.I.)
Participants group
 Chronic cough
  Exposed 2.30 (1.13–4.67)a 2.35 (1.14–4.85)a
  Referent Reference Reference
 Chronic phlegm
  Exposed 3.22 (1.20–8.66)a 2.98 (1.07–8.24)a
  Referent Reference Reference
 Episodes of chronic cough and phlegm
  Exposed 1.95 (1.30–2.91)b 1.91 (1.26–2.90)b
  Referent Reference Reference
 Chronic wheeze
  Exposed 6.21 (2.89–13.36)c 6.00 (2.78–12.94)c
  Referent Reference Reference
 Asthma
  Exposed 3.74 (1.60–8.76)b 3.18 (1.34–7.58)b
  Referent Reference Reference
Similar exposure group
 Chronic cough
  Green brick molding 5.80 (1.20–27.93)a 4.46 (0.84–23.75)
  Green brick stacking/carrying 3.03 (0.60–15.40) 5.61 (0.99–31.78)
  Red brick loading/carrying 2.44 (0.45–12.76) 4.13 0.71–24.09)
  Firing 4.39 (0.89–21.61) 2.24 (0.41–12.17)
  Coal crushing/carrying Reference Reference
 Chronic phlegm
  Green brick molding 7.94 (1.54–41.10)a 2.79 (0.43–18.17)
  Green brick stacking/carrying 2.81 (0.53–15.03) 4.43 (0.72–27.39)
  Red brick loading/carrying 3.01 (0.60–16.02) 3.95 (0.66–23.62)
  Firing 2.14 (0.36–12.63) 0.66 (0.09–5.13)
  Coal crushing/carrying Reference Reference
 Chronic bronchitis
  Green brick molding 1.15 (0.46–2.84) 1.15 (0.44–2.99)
  Green brick stacking/carrying 0.72 (0.27–1.94) 0.94 (0.33–2.68)
  Red brick loading/carrying 2.45 (1.10–5.57)a 3.08 (1.26–7.51)a
  Firing 2.58 (1.13–5.87)a 2.03 (0.84–4.87)
  Coal crushing/carrying Reference Reference
 Chronic wheezing
  Green brick molding 1.55 (0.57–4.23) 1.35 (0.48–3.82)
  Green brick stacking/carrying 0.93 (0.31–2.80) 0.90 (0.29–2.81)
  Red brick loading/carrying 2.29 (0.88–5.91) 2.12 (0.79–5.67)
  Firing 0.51 (0.14–1.80) 0.39 0.11–1.47)
  Coal crushing/carrying Reference Reference
 Asthma
  Green brick molding 1.95 (0.47–8.10) 1.75 (0.40–7.63)
  Green brick stacking/carrying 1.95 (0.47–8.10) 1.95 (0.45–8.52)
  Red brick loading/carrying 3.24 (0.87–12.30) 3.06 (0.77–12.08)
  Firing 0 0
  Coal crushing/carrying Reference Reference
  1. aSignificant at 0.05 level
  2. bSignificant at 0.01 level
  3. cSignificant at 0.001 level
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