Table 2 Crude odds ratios (OR) and 95 % confidence intervals (CI) for current asthma, current rhinitis and current eczema

Age (years)

60–77

1

1

1

40–59

1.48 (0.96–2.29)

1.34 (1.02–1.77)

1.91 (1.26–2.90)

18–39

1.34 (0.83–2.17)

1.65 (1.22–2.22)

1.38 (0.86–2.20)

Sex

Men

1

1

1

Women

1.34 (0.94–1.93)

0.88 (0.70–1.11)

1.45 (1.05–2.00)

Smoking

Never smoker

1

1

1

Ex-smoker

0.86 (0.56–1.31)

0.96 (0.73–1.26)

1.28 (0.87–1.89)

Current smoker

1.04 (0.64–1.70)

1.15 (0.83–1.59)

1.46 (0.93–2.28)

Family history

None

1

1

1

Asthma

1.33 (0.58–3.05)

0.72 (0.42–1.25)

1.44 (0.72–2.85)

Rhinitis

1.49 (0.88–2.51)

3.05 (2.20–4.24)

1.32 (0.83–2.08)

Both

5.41 (3.38–8.64)

3.32 (2.23–4.95)

1.82 (1.10–3.00)

Degree of urbanization

Rural area (<500 inh.)

1

1

1

Village (500–2000 inh.)

0.88 (0.29–2.65)

1.23 (0.65–2.37)

0.97 (0.35–2.74)

Small town (2000–10,000 inh.)

1.28 (0.55–3.00)

1.01 (0.58–1.75)

1.16 (0.51–2.68)

Larger town (>10,000 inh.)

1.29 (0.67–2.48)

1.41 (0.94–2.11)

1.39 (0.74–2.61)

Occupational exposure to GDF

No

1

1

1

Yes

1.70 (1.16–2.49)

1.10 (0.84–1.44)

1.73 (1.21–2.48)

Metropolitan domicile

No

1

1

1

Yes

0.86 (0.60–1.23)

1.03 (0.81–1.30)

1.21 (0.86–1.70)

Body mass index

Normal

1

1

1

Underweight

1.17 (0.47–2.88)

1.34 (0.75–2.38)

1.24 (0.56–2.78)

Overweight

1.07 (0.71–1.63)

0.94 (0.73–1.22)

0.98 (0.67–1.44)

Obese

2.10 (1.29–3.40)

1.79 (1.26–2.53)

1.43 (0.89–2.31)

Allergic sensitization

No

1

1

1

Yes

4.02 (2.76–5.84)

5.77 (4.34–7.67)

1.35 (0.94–1.93)