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Table 5 Studies from the Scandinavian countries presenting COPD prevalence estimates

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

Authors [reference] Country, area COPD-definition Study year Age-span (yy–yy) Sample size (n) COPD prevalence based on spirometry according to different criteria
Fixed ratio LLN Fixed ratio LLN
GOLD   GOLD ≥ 2 FEV1 < LLN
Lundbäck et al. [3] Sweden FEV1/VC 1996–1997 46–77 1237 14.3% * 8.1% *
Norrbotten Post-BD   (in 3 age groups)      
Kotaniemi et al. [30] Finland, FEV1/VC 1996–1997 21–70 683 9.4% * 5.4% *
Northern part Post-BD        
Lindberg et al. [31] Sweden FEV1/VC 1994 23–72 666 14.1% * 7.6% *
Norrbotten Pre-BD   46–72   17.1% * 9.7% *
Vasankari et al. [8] Finland FEV1/FVC 1978–1980 30–74 6364 * M: 4.7%; W: 2.2% * M: 3.9%; W: 1.4%
Nation wide Pre-BD 2000–2001 30–74 5495 * M: 4.3%; W: 3.1% * M: 3.6%; W: 1.5%
Fabricius et al.£, [32] Denmark FEV1/FVC 2001–2003  ≥ 35 5299 17.4% * 11.2% *
Copenhagen Pre-BD        
Danielsson et al. [33] Sweden FEV1/FVC 2006–2007  ≥ 40 548 16.2% 10.0% 6.7% *
Uppsala Post-BD        
Waatevik et al.£, [34] Norway FEV1/FVC 2003–2005 35–90 1664 13.7% * * *
Bergen Post-BD        
Backman et al. [9] Sweden FEV1/FVC 1994 23–72 660 10.5% 9.3% 8.5% 8.1%
Norrbotten Post-BD 46–72 481 13.2% 10.7% 11.6% 9.7%
 Backman et al. [9] Sweden FEV1/FVC 2009 23–72 623 8.5% 6.3% 3.9% 3.2%
Norrbotten Post-BD 46–72 465 11.2% 7.4% 5.6% 4.6%
Bhatta et al. [10] Norway FEV1/FVC 1995–1997  ≥ 40 7158 16.7% 10.4% M: 10.6%; W:6.1% *
Nord-Trøndelag Pre-BD 2006–2008 41–99 8788 14.8% 7.3% M: 8.2%; W: 6.5% *
  1. M among men, W among women, VC Highest of slow (SVC) or forced (FVC) expiratory capacity, £ = Based on follow-up, i.e. not cross-sectional study
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