Table 2 Characteristics of study subjects.

From: Expression, activity and localization of lysosomal sulfatases in Chronic Obstructive Pulmonary Disease

 

Never smokers, n = 6

Ever smokers, n = 8

COPD, n = 20

Gender (female/male), n

4/2

3/5

8/12

Smoking status (current/former), n

0

1/7

11/9

Pack years*

0

33 (24–38)

43 (35–49)

FEV1, L

3.4 (3.2–3.6)

3.3 (2.6–3.4)

1.7 (1.5–2.1)

FEV1, % of predicted

114 (95–139)

95 (93–98)

54 (49–70)

FEV1/FVC

0.84 (0.81–0.88)

0.78 (0.74–0.81)

0.50 (0.44–0.60)

  1. *A pack-year is defined as smoking 20 cigarettes (=one pack) per day for a year.
  2. Pack years, FEV1, FEV1 (%p) and FEV1/FVC are given as median with interquartile range (25–75%).
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