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Table 4 Respiratory symptoms according to definition of obstruction. PneumoLaus study, 2014–2017, Lausanne, Switzerland

From: GLI 2012 equations define few spirometric anomalies in the general population: the PneumoLaus study

 

Group 1: FEV1/FVC < LLN

Group 2: FEV1/FVC > LLN but < 0.7

Group 3: FEV1/FVC > LLN and > 0.7

p-value Group 1 vs. 2

p-value Group 2 vs. 3

p-value Group 1 vs. 3

N

188 (5.6)

224 (6.7)

2930 (87.7)

   

Chronic cough

21 (11.2)

11 (4.9)

113 (3.9)

0.018

0.428

< 0.001

Chronic sputum production

18 (9.6)

7 (3.1)

56 (1.9)

0.006

0.208

< 0.001

Chronic dyspnoea mMRC ≥2

8 (4.3)

5 (2.2)

36 (1.2)

0.241

0.199

0.001

  1. Results are expressed as number of participants and (percentage) for categorical variables. Between-group analysis performed using chi-square test. mMRC Modified Medical Research Council dyspnoea scale