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Table 2 Comparison of people individuals with diagnosed and undiagnosed obstructive lung disease among thoseparticipants with airflow limitation

From: Underdiagnosis of obstructive lung disease: findings from the French CONSTANCES cohort

 

Previous OLD diagnosisa

P

Asthma (N = 224)

COPD (N = 46)

No (N = 493)

Sociodemographic

    

 Males, %

48.8

77.1

54.5

0.04

 Age (years), m

41.8

58.5

43.8

 < 0.001

 ISCED education level, %

    

  0–2 (≤ lower secondary)

9.3

37.6

13.4

0.004

  3–4 (upper secondary)

36.3

42.1

40.4

 

   ≥ 5 (tertiary)

54.4

20.2

46.2

 

Tobacco consumption, %

    

 Never

43.5

17.5

30.8

 < 0.001

 Ever < 10 pack-years

37.9

4.7

28.5

 

 Ever ≥ 10 pack-years

18.6

77.8

40.7

 

BMI (kg/m2), m

24.6

27.4

24.8

0.38

Respiratory symptoms, %

    

 Past-year wheezing

64.4

73.8

26.3

 < 0.001

 Chronic cough

14.8

33.4

16.1

0.10

 Chronic sputum

11.8

22.9

11.5

0.29

 Dyspnoea grade ≥ 2

20.9

51.8

15.6

 < 0.001

  ≥ 1 symptom

72.6

79.7

39.7

 < 0.001

Cardiovascular comorbidities, %

    

 No

86.7

61.7

87.1

0.003

 IHD, stroke, PAD

1.9

6.7

3.7

 

 Other

11.4

31.8

9.2

 

Lung function

    

 FEV1 (L), m

2.56

1.80

2.75

 < 0.001

 FEV1% predicted, m

72.8

58.0

78.5

 

 GOLD severity, %

   

 < 0.001

  Mild

28.3

3.3

48.4

 

  Moderate

64.9

56.3

48.4

 

  Severe

6.8

40.4

3.3

 < 0.001

  1. BMI body mass index; COPD chronic obstructive pulmonary disease; FEV1 forced expiratory volume in 1 s; GOLD Global Initiative on Obstructive Lung Disease; IHD ischemic heart disease; ISCED International Standard Classification of Education; OLD obstructive lung disease; PAD peripheral arterial disease
  2. aPrevious OLD diagnosis reported by the participants; Asthma: diagnosis of asthma only; COPD: diagnosis of COPD, emphysema, or chronic bronchitis associated with a diagnosis of asthma in eight patients; No: no diagnosis of OLD (asthma, COPD, emphysema, chronic bronchitis, or bronchiectasis)
  3. Data are presented as weighted percentage (%) or weighted mean (m)
  4. Missing values in 95 participants (10 for education level, 90 for tobacco status, 5 for BMI, 2 for respiratory symptoms)