Heterogeneity of Systemic Oxidative Stress Profiles in COPD: A Potential Role of Gender

Table 1

Anthropometric and clinical characteristics of 54 COPD patients.

	COPD patients; ()
Age (years)	60 ± 7
Sex ratio (W/M)	27/27
BMI (kg/m^2)	24.7 ± 4.1
Fat-free mass index (kg/m^2)	17.3 ± 2.3
Muscle mass index (kg/m^2)	7.9 ± 1.5
FEV1 (% pred.)	54 ± 21
FEV1/FVC ratio	53 ± 14
GOLD stages I/II/III/IV ()	6/23/20/5
BODE score [18]	2.1 ± 1.5
Breathlessness, MRC score	1.5 ± 1.1
Tobacco consumption (packs/year)	44 ± 24
Physical activity level, Voorips score [21]	4.4 ± 3.2
6-MWD (m)	518 ± 90
6-MWD (% pred.)	81 ± 14
Wsl (% pred.)	50 ± 19
VO2sl (% pred.)	60 ± 16
QMVC (Nm)	102 ± 37
QMVC (% pred.)	75 ± 19
Qend (s)	368 ± 152

Results are expressed in mean ± SD. COPD = chronic obstructive pulmonary disease; W = women/M = men; MRC = Medical Research Council; BODE index = body mass index, airway obstruction, dyspnoea, and exercise capacity index (6-MWD); BMI = body mass index (kg/m²); FEV₁ (% pred.) = forced expiratory volume in 1 second; W_sl (% pred.) = symptom-limited power output; VO₂sl (% pred.) = symptom-limited oxygen uptake; 6-MWD (m) = 6-minute walking distance; QMVC (Nm) = quadriceps maximal voluntary contraction expressed in Newtons; Qend (s) = quadriceps endurance time expressed in seconds.