Table 3

 Exercise parameters in COPD patients with normal and raised CRP levels

Normal CRPRaised CRPp value
Values are mean (SD) unless otherwise indicated. All incremental ergometry test parameters are shown as peak values.
FFM, fat-free mass; V˙o2, oxygen consumption; V˙co2, carbon dioxide production; RER, respiratory exchange ratio; V˙e, ventilation.
*Median (range) non-parametrically tested with the Mann-Whitney U test.
Incremental ergometry
    Workload (W)63.0 (29.3)51.8 (24.0)0.040
    Load/FFM (W/kg)1.38 (0.59)1.11 (0.49)0.015
    V˙o2 (ml/min)996 (333)894 (268)0.116
    V˙co2 (ml/min)989 (395)865 (288)0.095
    RER0.98 (0.11)0.96 (0.09)0.472
    V˙e (l/min)38.6 (13.0)37.3 (10.3)0.629
    V˙e/V˙o239.4 (7.1)42.9 (8.6)0.046
    V˙o2/load* (ml/W)14.9 (8.2–43.2)16.2 (10.1–27.9)0.056
    V˙co2/load* (ml/W)14.7 (7.2–35.7)15.9 (10.6–27.9)0.133
Submaximal ergometry
    Duration time* (min)13 (3–30)8 (2–30)0.017
    Efficiency* (%)16.2 (5.5–25.5)14.2 (8.1–19.4)0.138
6-min walking distance
    Distance (m)355 (120)301 (96)0.014