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Table 4 Functional characteristics of the 45 adult obese patients

From: The modified Medical Research Council scale for the assessment of dyspnea in daily living in obesity: a pilot study

  Total (n = 45)
Spirometry (n = 45)  
 FEV1,% pred 88 ± 18
 VC,% pred 92 ± 20
 FEV1 < 80% 13 (29%)
 FEV1/VC 0.77 ± 0.10
 FEV1/ VC < 0.7 5 (11%)
Plethysmography (n = 38)  
 FRC,% pred 94 ± 23
 ERV,% pred 56 ± 34
 TLC,% pred 98 ± 17
 TLC < 80% 5 (13%)
 DLCO,% pred 83 ± 18
 DLCO < 70% 10 (26%)
Arterial blood gases (n = 43)  
 pH 7.42 ± 0,03
 PaO2 (mmHg) 90 ± 16
 PaO2 ≤ 70 mmHg 0 (0%)
 PaCO2 (mmHg) 39 ± 4
 PaCO2 > 45 mmHg 0 (0%)
Walking test (n = 45)  
 6-minute walk distance (m) 420 ± 112
 SpO2 at rest (%) 97 ± 2
 SpO2 after 6MWT (%) 95 ± 2
 Decrease > 4% of SpO2 7 (16%)
 SpO2 after 6MWT < 90% 1 (2%)
  1. Data are expressed as mean ± SD or number (%).
  2. FEV1: expiratory volume in one second, VC: vital capacity, FRC: functional residual capacity, ERV: expiratory reserve volume, TLC: total lung capacity, DLCO: carbon monoxide diffusing capacity of the lung, pred: predicted value, 6MWT: six-minute walk test.