Table 1 Basic demographics

n

871

27

Sex, M/F [n (%)]

555 (64%) / 316 (36%)

17 (63%) / 10 (37%)

P = 0.9358 #

Age, years

62.8 (62.4–63.3)

68.6 (66.6–70.5)

P < 0.0001 £

BMI, kg/m²

26.8 (26.4–27.2)

26.6 (23.8–29.4)

P = 0.8837 £

FEV₁, L

1.30 (1.27–1.33)

1.81 (1.04–1.33)

P = 0.2068 £

FEV₁% predicted

46.5 (45.6–47.5)

45.4 (40.9–50.0)

P = 0.6986 £

Current smokers [n (%)]

330 (38%)

3 (11%)

P = 0.0046 #

Smoking history, pack-years

46.7 (45.0–48.3)

59.0 (41.7–76.3)

P = 0.0152 £

mMRC [IQR]

1 (1–2)

2 (1–3)

P = 0.0486 #

GOLD stage [IQR]

2 (2–3)

2 (2–3)

P = 0.5904 #