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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