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Table 2 Odds Ratios (95% confidence intervals) based on multivariate logistic regressiona for associations with chronic bronchitis

From: Prevalence and associated risk factors of chronic bronchitis in First Nations people

Variable

Adjustedb OR (95% CI)

Household smoking

 

 Yes

0.36 (0.11, 1.14)

 No

1.00

Mildew odour or musty smell in home

 

 Yes

2.33 (1.21, 4.50)

 No

1.00

House has an air conditioner

 

 Yes

2.23 (1.18, 4.24)

 No

1.00

Age, in years

 

  > 50

6.08 (2.58, 14.33)

 36–50

4.26 (1.74, 10.41)

 26–35

0.99 (0.33, 2.95)

 18–25

1.00

Sex

 

 Female

1.49 (0.76, 2.92)

 Male

1.00

Body Mass Index (kg/m2)

 

 Obese (>30)

0.17 (0.05, 0.59)

 Overweight (25–30)

0.19 (0.06, 0.63)

 Normal (0− < 25)

1.00

Allergy to house dust

 

 Yes

3.49 (1.75, 6.97)

 No

1.00

Interaction (See Fig. 1)

P value

Household smoking X Body Mass Index

<0.05

  1. aAdjusted for repeated measure on households
  2. blogistic regression; odds ratios that are significantly different from 1.00 (p < 0.05) are in bold face