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Table 1 Demographic data of the COPD patients (n = 443)

From: Determinants of chronic obstructive pulmonary disease severity in the late-elderly differ from those in younger patients

 

Age <75 years

Age ≥75 years

p value

No. of subjects

252

191

 

Age (mean, years)

66.9

80.0

 

Sex (male/female)

231/21

175/16

n.s.

Smoking amount (mean, pack-year)

56.9

55.6

n.s.

Current smoker (%)

17.3

7.7

0.004

BMI (mean, kg/m2)

22.5

22.3

n.s.

VC (mean, ml)

3365

2934

<0.001

VC (mean, % predicted)

93.8

93.5

n.s.

FEV1 (mean, ml)

1717

1465

<0.001

FEV1 (mean, % predicted)

60.5

62.1

n.s.

GOLD grade (I/II/III/IV)

52/114/67/19

41/88/48/14

n.s.

LTOT (%)

10.7

15.9

n.s.

CAT (mean)

12.5

12.7

n.s.

SGRQ symptom (mean)

36.5

37.9

n.s.

SGRQ activity (mean)

39.7

47.5

0.001

SGRQ impact (mean)

18.3

22.3

0.04

SGRQ total (mean)

27.4

32.2

0.02

Oral corticosteroids (%)

3.2

3.6

n.s.

Inhaled corticosteroids (%)

35.0

32.8

n.s.

Long-acting β2 agonists (%)

42.0

48.8

n.s.

Long-acting muscarinic antagonists (%)

64.0

58.3

n.s.

  1. BMI body mass index, VC vital capacity, FEV 1 forced expiratory volume in 1 s, GOLD Global Initiative for Obstructive Lung Disease, LTOT long-term oxygen therapy, CAT COPD assessment test, SGRQ St George’s Respiratory Questionnaire, n.s. not significant