Skip to main content

Table 1 Study population characteristics

From: Airways resistance and specific conductance for the diagnosis of obstructive airways diseases

 

Healthy

Obstruction

Other pulmonary diseases

Subjects, n

157

651

168

Age, years

53 (41–64)

55 (42–65)

57 (44–67)

Smoking, pack yr.

0 (0–5)

0 (0–30)

0 (0–15)

BMI, kg/m2

25.3 (21.6–28.7)

25.2 (21.1–29.7)

27.6 (23.1–32.0)

FEV1, %predicted

103.3 (91.5–114.7)

84.2 (67.0–97.7)

88.1 (74.4–103.8)

FVC, %predicted

106.6 (97.2–114.9)

97.7 (84.4–110.4)

92.1 (76.5–107.8)

DLCO, %predicted

86.4 (77.0–99.2)

78.7 (63.0–89.9)

70.3 (56.3–85.7)

RV, %predicted

106.9 (91.6–129.7)

131.6 (104.0–159.9)

101.8 (80.9–124.6)

TLC, %predicted

104.6 (95.7–112.1)

106.0 (94.8–117.1)

88.6 (79.7–103.4)

FRC, %predicted

105.1 (93.4–123.1)

119.4 (99.2–143.3)

95.7 (78.0–116.5)

RAW, kPa/L/s

0.24 (0.18–0.30)

0.32 (0.23–0.45)

0.25 (0.17–0.35)

sGAW, 1/ kPa*sec

1.21 (0.95–1.57)

0.84 (0.56–1.17)

1.28 (0.90–1.71)

  1. Definition of abbreviations: BMI body mass index, D L,CO carbon monoxide diffusing capacity, FEV 1 forced expiratory volume in one second, FRC functional residual capacity, FVC forced vital capacity, RV residual volume, R AW airway resistance, sG AW specific airway conductance, TLC total lung capacity, Values are median and IQR