Table 2

 Crude and adjusted odds ratios of sick building syndrome-related symptoms, chronic respiratory symptoms and respiratory infections during the past 12 months in relation to exposure to carbonless copy paper

CrudeAdjusted*Adjusted†
OR (95% CI)OR (95% CI)OR (95% CI)
*Adjusted for age and sex.
†Adjusted for the set of covariates that changed the estimate of interest by >10% (for details, see Data analysis of the Methods section).
‡Adjusted OR did not change as no other covariate changed the estimate >10% when added to the model including sex and age.
Nasal symptoms0.99 (0.21 to 4.77)0.93 (0.19 to 4.55)0.84 (0.17 to 4.19)
Eye symptoms4.09 (0.81 to 20.7)4.04 (0.75 to 21.7)2.54 (0.40 to 15.9)
Throat symptoms0.79 (0.09 to 6.86)0.77 (0.09 to 6.73)1.04 (0.11 to 9.59)
Skin symptoms0.49 (0.06 to 3.96)0.48 (0.06 to 3.89)0.62 (0.07 to 5.18)
Headache4.19 (1.18 to 14.9)4.16 (1.15 to 15.0)3.11 (0.80 to 12.1)
Fatigue1.86 (0.77 to 4.47)1.93 (0.80 to 4.69)1.79 (0.70 to 4.57)
Cough0.61 (0.18 to 2.12)0.59 (0.17 to 2.09)0.59‡ (0.17 to 2.09)
Phlegm production1.68 (0.77 to 3.69)1.76 (0.79 to 3.90)1.76‡ (0.79 to 3.90)
Chronic bronchitis2.44 (0.57 to 10.5)2.33 (0.54 to 10.1)2.84 (0.59 to 13.6)
Wheezing1.14 (0.55 to 2.36)1.13 (0.54 to 2.36)1.13‡ (0.54 to 2.36)
Breathlessness1.69 (0.84 to 3.42)1.65 (0.81 to 3.37)1.65‡ (0.81 to 3.37)
Common colds0.86 (0.49 to 1.52)0.78 (0.43 to 1.40)0.78‡ (0.43 to 1.40)
Tonsillitis0.88 (0.19 to 4.15)0.79 (0.16 to 3.84)0.79‡ (0.16 to 3.84)
Sinus infections2.09 (1.09 to 3.99)1.99 (1.01 to 3.95)1.99‡ (1.01 to 3.95)
Middle ear infections2.59 (0.82 to 8.18)2.51 (0.79 to 7.96)2.41 (0.73 to 7.95)
Bronchitis0.91 (0.36 to 2.29)0.93 (0.37 to 2.38)0.87 (0.34 to 2.25)
Diarrhoea1.59 (0.91 to 2.78)1.49 (0.84 to 2.63)1.49‡ (0.84 to 2.63)