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Table 2 Demographic, clinical data, and data of the St George's Respiratory Questionnaire of participating COPD patients

From: Health status in COPD cannot be measured by the St George's Respiratory Questionnaire alone: an evaluation of the underlying concepts of this questionnaire

Variable

Mean ± SD

Male sex %

76.7

Age (years)

65.8 ± 9.0

Education %

 

   Low

48.6

   Middle

29.5

   High

19.9

Personal situation %

 

   Partner

77.8

   Divorced

6.3

   Widowhood

8.3

   Single

7.6

Cigarette smoking %

 

   Current

41.8

   Former

45.9

   Never

11.0

BMI (kg/m2)

25.9 ± 4.1

FEV1 (L)

1.6 ± 0.5

FEV1 % predicted

53.6 ± 13.9

FEV1/FVC %

44.0 ± 11.4

TLC % predicted

103.7 ± 14.6

RV % predicted

128.3 ± 30.3

TLCO % predicted

62.3 ± 21.5

GOLD %

 

   I

2.1

   II

58.9

   III

34.2

   IV

4.8

SGRQ section

 

   Symptoms

40.9 ± 24.8

   Activity

40.9 ± 21.8

   Impacts

20.2 ± 13.5

   Total

30.2 ± 15.4

  1. Data are presented as mean ± SD unless otherwise indicated. Percentages may not add up to 100 due to missing data (three patients with no specified education, two patients with no specified smoking habits). BMI: body mass index; FEV1 % predicted: forced expiratory volume in one second as percentage predicted; FEV1/FVC %: forced expiratory volume/forced vital capacity; TLC: total lung capacity; TLC % predicted: total lung capacity as percentage predicted; RV: residual volume; RV: residual volume as percentage predicted; TLCO % predicted: transfer capacity (of lung) for carbon monoxide as percentage predicted; GOLD: Global Initiative for Chronic Obstructive Lung Disease; SGRQ: St George's Respiratory Questionnaire.