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Table 1 Baseline characteristics

From: Effect of obesity on constant workrate exercise in hyperinflated men with COPD

  Normal BMI (NBMI), n = 84 Overweight (OW), n = 130 Obese (OB), n = 64 p
        NBMI OW NBMI
  Mean (SD) Mean (SD) Mean (SD) vs. vs. vs.
        OW OB OB
Age, years 61.4 (7.2) 62.6 (6.4) 61.6 (6.6) - - -
Tobacco exposure, Pack*years 52.3 (25.7) 59.0 (29.6) 55.8 (25.5) - - -
BMI, kg*m-2 22.5 (1.7) 27.3 (1.5) 33.4 (3.1) 0.0001 0.0001 0.0001
Ideal weight, kg 77.6 (0.6) 77.9 (0.5) 76.9 (0.7) - - -
FEV1, L 1.31 (0.39) 1.35 (0.45) 1.42 (0.49) - - -
   % predicted 40 (11) 42 (13) 44 (14) - - -
FVC, L 3.09 (0.81) 3.04 (0.80) 2.89 (0.78) - - -
   % predicted 75 (18) 74 (17) 71 (17) - - -
FEV1/FVC 42.9 (8.6) 44.5 (10.1) 48.9 (11.7) - 0.05 0.01
TLC 8.38 (1.27) 8.04 (1.27) 7.79 (1.14) - - 0.05
   % predicted 121 (17) 116 (17) 114 (14) - - 0.05
IC, L 2.46 (0.57) 2.51 (0.60) 2.50 (0.65) - - -
   % predicted 73 (15) 75 (17) 76 (18) - - -
IC/TLC 30 (7) 31 (7) 32 (8) - - -
FRC, L 6.06 (1.16) 5.66 (1.10) 5.40 (1.05) 0.05 - 0.001
   % predicted 170 (31) 158 (29) 152 (27) 0.05 - 0.001
RV, L 5.02 (1.26) 4.63 (1.16) 4.53 (0.99) - - 0.05
   % predicted 208 (50) 188 (50) 185 (46) 0.05 - 0.05
DLCO, ml*mmHg-1*min-1 15.4 (5.1) 16.2 (5.5) 19.2 (6.6) - 0.01 0.001
   % predicted 46 (22) 48 (24) 59 (27) - 0.01 0.01
Incremental exercise test          
Peak VO2, L*min-1 1.204 (0.385) 1.375 (0.379) 1.550 (0.450) 0.01 0.05 0.0001
   ml*kg-1*min-1 17.5 (5.3) 16.3 (4.0) 15.4 (4.4) - - 0.05
   % predicted 50 (15) 57 (14) 65 (18) 0.01 0.01 0.0001
   ml*kgideal weight -1*min-1 15.5 (4.7) 17.5 (4.8) 20.2 (5.6) 0.01 0.01 0.0001
Peak VE, L*min-1 44.5 (13.8) 48.5 (13.5) 49.2 (14.3) - - -
   % MVV 100.3 (32.2) 108.6 (32.9) 108.0 (39.1) - - -
Peak power, W 82.8 (28.1) 90.4 (26.7) 93.2 (35.1) - - -
   % predicted 45 (14) 50 (15) 52 (18) - - 0.05
  1. Values are mean (SD), min - max. Definition of abbreviations: BMI: body mass index, FEV1 : forcedexpiratory volume in 1 second, FVC: Forced vital capacity, TLC: total lung capacity, IC: inspiratory capacity, FRC: functional residual capacity, RV: residual volume, DLCO: dilution capacity for carbon monoxide.