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Table 1 Patient characteristics

From: Ultrasound assessment of the rectus femoris in patients with chronic obstructive pulmonary disease predicts poor exercise tolerance: an exploratory study

  Overall
n 154
Age 64 (41–83)
Sex/male (%) 108 (70)
FEV1(L) 1.56 (0.45–3.1)
FEV1%pred 59.35 (30.1–110.6)
FVC (L) 2.80 (0.92–5.21)
FVC% pred 80.82 (34.4–123.8)
FEV1/FVC 54.90 (31–68.98)
RV (L) 4.06 (1.34–7.31)
TLC (L) 6.44 (3.52–9.84)
RV/TLC (%) 73.69 (31–242.4)
BMI (kg/m2) 23.92 (11.3–37.3)
FFMI (kg/m2) 17.00 (9.5–23.8)
Height (cm) 165.41 (141–180)
Weight (Kg) 65.07 (26.7–110.4)
mMRC 2 (0–4)
CAT 15 (0–37)
RFthick (cm) 5.46 (4.5–6.97)
RFcsa (cm2) 7.05 (6.01–8.28)
6MWD (m) 369 (108–554)
QMS (kg) 42.91 (21.55–68.1)
  1. FEV1, Forced Expiratory Volume in the first second; FEV1% pred, FEV percentage predicted; FVC, forced vital capacity; FVC% pred, FVC percentage predicted; RV, residual volume; TLC, total lung capacity; BMI, body mass index; FFMI, fat-free mass index; CAT, COPD Assessment Test; 6MWD, 6-min walk distance; QMS, quadriceps muscle strength