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Table 3 Risk factors for positive skin prick test (SPT) and elevated specific IgE in 2009 expressed as odds ratios (OR) with 95% confidence intervals (CI) calculated by multiple logistic regression analysis

From: Increase in sensitization to common airborne allergens among adults – two population-based studies 15 years apart

  SPT Specific IgE
Any pollen Any animal Any SPT Any pollen Any animal Any IgE
Independent variable OR 95% CI OR 95% CI OR 95% CI OR 95% CI OR 95% CI OR 95% CI
Age             
 20-29 y 1 - 1 - 1 - 1 - 1 - 1 -
 30-39 y 0.48 0.23-1.00 0.57 0.27-1.19 0.55 0.26-1.14 0.44 0.20-0.95 0.93 0.40-2.13 0.55 0.26-1.17
 40-49 y 0.54 0.27-1.07 0.69 0.35-1.36 0.67 0.34-1.33 0.49 0.24-0.98 0.96 0.45-2.06 0.62 0.31-1.22
 50-60 y 0.31 0.15-0.62 0.46 0.23-0.91 0.39 0.20-0.77 0.29 0.14-0.60 0.65 0.29-1.44 0.39 0.19-0.78
 >61 y        0.10 0.05-0.25 0.32 0.13-0.74 0.20 0.10-0.40
Male sex 1.38 0.88-2.14 1.69 1.09-2.63 1.51 1.00-2.29 1.30 0.85-2.01 1.40 0.90-2.19 1.30 0.90-1.87
Family history of allergy 3.16 2.01-4.97 3.26 2.07-5.12 3.12 2.02-4.83 2.68 1.72-4.20 3.13 1.98-4.94 2.68 1.80-3.97
Ever smoked 0.89 0.57-1.39 0.79 0.51-1.23 0.93 0.62-1.42 0.69 0.44-1.06 0.78 0.50-1.22 0.79 0.55-1.14
Urban living 1.58 0.95-2.64 1.56 0.94-2.60 1.66 1.03-2.66 1.79 1.06-3.03 1.14 0.69-1.88 1.54 1.00-2.36
Urban living in childhood 0.90 0.56-1.43 1.06 0.67-1.68 1.08 0.70-1.67 1.05 0.66-1.67 0.87 0.54-1.41 0.87 0.58-1.31
Furry animals in childhood 0.81 0.51-1.28 0.80 0.51-1.25 0.82 0.53-1.26 0.96 0.60-1.49 0.62 0.39-0.99 0.79 0.53-1.18