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Table 1 Baseline characteristics of the study cohort (n = 1195)

From: Effects of airway obstruction and hyperinflation on electrocardiographic axes in COPD

Parameter Mean values ± SD
or numbers
Anthropometry
 Age, years 63.9 [±8.4]
 Sex, m/f 677/518
 BMI, kg/m2 26.7 [±5.0]
 Diastolic blood pressure, mmHg 75.0 [±10.4]
Lung function
 GOLD 0/1/2/3/4 175/107/468/363/82
 FEV1 % predicted 58.8 [±20.7]
 FRC % predicted 145.0 [±34.9]
 RV, l 3.77 [±1.15]
 TLC, l 7.16 [±1.46]
 RV/TLC 0.52 [±0.11]
 TLCO % predicted 59.9 [±22.8]
 KCO % predicted 67.5 [±22.9]
Echocardiographic measures
 LVEDD, mm 47.5 [±6.5]
 LVESD, mm 31.2 [±6.6]
 LV mass, g/m2 106.6 [±34.5]
 RV wall thickness, mm 5.9 [±3.5]
Electrocardiogram
 RR interval, ms 847.8 [±137.2]
 QT duration, ms 386.3 [±29.5]
 P wave axis, degree 60.5 [±25.0]
 QRS axis, degree 36.1 [±42.6]
 T wave axis, degree 53.3 [±23.1]
  1. The table shows mean values [± standard deviations], except for gender and GOLD grade. BMI = body-mass index. Lung function: FEV1 = forced expiratory volume in 1 s, FRC = functional residual capacity, RV = residual volume; TLC = total lung capacity; TLCO = transfer factor of carbon monoxide (CO); KCO = CO transfer coefficient (ratio of TLCO and alveolar volume). Echocardiographic measures: LV = left ventricular; LVEDD = left ventricular end-diastolic diameter; LVESD = left ventricular end-systolic diameter; RV = right ventricular