Table 1 General characteristics and clinical data of the subjects included in the study

Age (years)

59 (53–67)

61 (53–67)

0.654

Sex (F/M)

30/25

8/6

0.862

BMI (kg/m²)

25.5 (23.7—27.6)

26.4 (24.9–28.7)

0.251

Former smokers, N (%)

36 (65%)

11 (78%)

0.347

Pack-years

15 (0–26)

(18 (3–40)

0.342

Asthma diagnosis, N (%)

2 (4%)

1 (7%)

0.566

hsCRP (mg/L)

0.91 (0.61–1.40)

1.75 (0.52–3.70)

0.180

Eosinophils (10⁹ cells/L)

0.10 (0.10–0.20)

(0.10 (0.08–0.20)

0.505

FeNO (ppb)

17 (13–28)

15 (12–21)

0.396

FVC % pred^a

95.9 (89.0–100.3)

104.1 (91.2–109.1)

0.054

FEV1% pred^a

93.4 (85.2–97.2)

97.0 (85.9–105.7)

0.495

FEV1/FVC^a

76.4 (71.2–79.8)

75.9 (66.1–78.1)

0.249

R5 Hz (kPa/(L/s))^a

0.330 (0.270–0.390)

0.305 (0.285–0.398)

0.987

R5 Hz % pred^a

94.0 (83.9–107.3)

93.8 (84.6–105.9)

0.867

R5-R20 (kPa/(L/s))^a

0.043 (0.025–0.063)

0.022 (0.015–0.072)

0.472

R5-R20% pred^a

75.8 (45.2–128.8)

42.5 (29.7–129.0)

0.453

AX (kPa/L)^a

0.213 (0.105–0.328)

0.143 (0.092–0.401)

0.710

AX % pred^a

83.6 (46.6–145.1)

65.1 (44.8–165.7)

0.685