Table 1. General characteristics of the population in study.

	CRF patients(n = 40)	Controls(n = 35)	p
Male/Female	26/14	17/18	0.123
Age, years	71.5 (7.3) [59–86]	69.4 (6.1) [60–83]	0.210
BMI, kg/m2	24.1 (4.2) [15.4–36.4]	25.8 (4.0) [19.4–31.6]	0.083
FEV1
L	1.03 (0.3) [0.4–1.7]	2.71 (0.5) [2.0–3.6]	<0.001
% predicted	41.0 (9.6) [16–54]	115.6 (16.8) [87–148]	<0.001
FCV
L	2.10 (0.6) [0.9–3.1]	3.38 (0.8) [2.1–5.0]	<0.001
% predicted	61.9 (12.2) [35–79]	118.7 (19.4) [80–156]	<0.001
FEV1/FCV, %	49.9 (12.0) [28–69]	76.8 (7.4) [69–88]	<0.001
PaO2, mmHg (on oxygen)	69.8 (11.5) [51–76]	-	-
PaCO2, mmHg (on oxygen)	46.2 (9.2) [31–53]	-	-
Supplemental oxygen required (FiO2), %	27.8 (3.2) [24]–[36]	-	-
PaO2/FiO2	254.3 (52.7) [162–357]	-	-
Arm circumference, cm	25.9 (2.7) [21]–[35]	28.4 (3.1) [24]–[35]	0.009
Waist circumference, cm	84.6 (8.0) [72–99]	97.0 (13.7) [70–125]	<0.001
Hip circumference, cm	88.6 (7.5) [74–101]	99.8 (5.7) [91–111]	<0.001
Tricipital plica, mm	8.8 (3.2) [1.1–14.3]	8.8 (8.8) [1.1–25]	0.635
Bicipital plica, mm	8.7 (7.0) [1.1–25]	8.2 (9.0) [1.1–30]	0.822
Sub-scapular plica, mm	12.3 (6.8) [1.1–25]	17.4 (24.4) [1.1–65]	0.264
Up-iliac plica, mm	14.8 (6.3) [1.1–29]	22.5 (26.5) [1.1–58]	0.115
FMI, kg/m2
Male	6.30 (3.7) [0.9–10.4]	8.26 (2.0) [5.7–11.0]	0.241
Female	9.55 (3.0) [5.6–13.4]	10.04 (4.3) [5.7–20.7]	0.779
FFMI, kg/m2
Male	17.01 (2.1) [13.2–19.8]	19.42 (1.3) [17.5–21.0]	0.022
Female	15.07 (1.6) [13.4–18.1]	16.04 (1.9) [13.6–19.1]	0.258

Value expressed as mean ± standard deviation (SD) and [range].

FMI: Fat mass index; FFMI: Fat-free mass index.