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Table 4 Comparison between prevalence of COPD and moderate to severe COPD (GOLD ≥ 2) in 2009 and 1994 in Northern Sweden

From: Decreased COPD prevalence in Sweden after decades of decrease in smoking

 

Unadjusted

Adjusted for age and sex

Fully adjusted

PR

95% CI

P-value

PR

95% CI

P-value

PR

95% CI

P-value

All subjects

         

 COPD

0.59

(0.39–0.89)

0.011

0.56

(0.38–0.83)

0.004

0.69

(0.46–1.03)

0.071

 GOLD ≥ 2

0.40

(0.24–0.66)

 < 0.001

0.38

(0.23–0.62)

 < 0.001

0.47

(0.28–0.77)

0.003

Women

         

 COPD

0.50

(0.26–0.95)

0.033

0.47

(0.25–0.88)

0.019

0.51

(0.27–0.97)

0.040

 GOLD ≥ 2

0.36

(0.15–0.83)

0.017

0.33

(0.15–0.76)

0.009

0.33

(0.14–0.78)

0.012

Men

         

 COPD

0.66

(0.39–1.12)

0.127

0.64

(0.38–1.06)

0.085

0.84

(0.51–1.38)

0.489

 GOLD ≥ 2

0.42

(0.23–0.79)

0.007

0.41

(0.22–0.75)

0.004

0.56

(0.30–1.02)

0.059

Subjects aged > 40 years

         

 COPD

0.65

(0.43–0.99)

0.043

0.63

(0.42–0.95)

0.027

0.77

(0.50–1.17)

0.215

 GOLD ≥ 2

0.44

(0.26–0.73)

0.002

0.42

(0.26–0.70)

0.001

0.52

(0.31–0.86)

0.011

  1. Results expressed as prevalence ratios (PR) with 95% CI from Poisson regression analyses, comparing 2009 with 1994
  2. PR = Prevalence ratio comparing the prevalence in 2009 with the prevalence in 1994
  3. The fully adjusted model includes year of study, age, sex, BMI categories, socioeconomy, and smoking habits as covariates. P-values from Wald chi-square test. Information on exposure to gas, dust or fumes not available in 1994 and thus not included in the models. Bold font indicates P < 0.05
  4. COPD = Post-bronchodilator chronic airway obstruction according to the fixed ratio definition (FEV1/FVC < 0.7) in combination with respiratory symptoms. GOLD ≥ 2 = COPD with post-BD FEV1 < 80% of predicted
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Respiratory Research

ISSN: 1465-993X

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