Table 2 Patient baseline characteristics

From: Tiotropium in patients with moderate COPD naive to maintenance therapy: a randomised placebo-controlled trial

Characteristic

Tiotropium (n=238)

Placebo (n=219)

Age, years

61.2±8.2

62.3±8.6

Male, %

69.7

67.1

Height, cm

171.4±8.2

170.5±8.3

Weight, kg

79.7±16.6

83.2±20.1

BMI, kg/m2

27.0±4.9

28.5±5.9

Current smoker, %

61.7

57.0

Smoking history, pack-years

44.0±22.4

43.9±34.9

Pre-bronchodilator

 FEV1, l

1.75±0.44

1.70±0.44

 FVC, l

3.25±0.79

3.17±0.84

Post-bronchodilator

 FEV1, l

1.95±0.44

1.90±0.43

 FEV1, % predicted

65.6±8.2

65.8±8.2

 FVC, l

3.53±0.80

3.41±0.87

 FEV1/FVC

0.6±0.1

0.6±0.1

WPAI

 Activity impairment due to health, % a

28.0±22.3

25.4±21.4

 Patients employed, %

41

37

 Impairment while working due to health, % b

21.1±21.1

17.2±20.2

 

Median

GM (95% CI)

Median

GM (95% CI)

Activity c

 Steps, number/day

6,748.7

6,374.5 (5,889.2–6,899.9)

6,901.8

6,433.3 (5,950.7–6,955.0)

 Time in moderate or higher (≥3 METs), min/day

86.8

77.2 (67.9–87.7)

73.8

68.6 (59.6–78.9)

 Time in age-appropriate moderate or higher activity, min/day

24.7

20.62 (16.85–25.22)

20.6

19.28 (15.77–23.57)

  1. Data are mean±s.d. unless specified otherwise.
  2. Abbreviations: BMI, body mass index; CI, confidence interval; FEV1, forced expiratory volume in 1s; FVC, forced vital capacity; GM, geometric mean; METs, metabolic equivalents; WPAI, Work Productivity and Activity Impairment questionnaire with outcomes expressed as impairment percentages (higher numbers indicate greater impairment and less productivity; i.e., worse outcomes).
  3. an=433.
  4. bn=164.
  5. cMedian values.