Table 2

Correlation between distance in 6MWT and parameters

Rp Value
Age0.2410.0702
BMI0.2210.0988
Respiratory function
 %FVC0.3410.0094
 %FEV10.3660.0051
 FEV1/FVC0.3290.0124
 IC0.4530.0004
Cardiac parameters measured by MDCT
 LVEF0.2340.0800
 LVEDV0.3320.0116
 LVEDVI0.2730.0402
 LVESV0.1560.2451
 LVESVI0.1230.3601
 LVSV0.4580.0003
 LVCO0.3900.0027
 LVCI0.3330.0114
 RVEF0.2260.0910
 RVEDV0.1930.1499
 RVEDVI0.1490.2689
 RVESV0.0710.6001
 RVESVI0.0260.8499
 RVSV0.2750.0385
 RVCO0.1950.1455
 RVCI0.1670.2138
Cardiac parameters measured by echocardiography
 LVDd0.0550.6891
 LVDs0.0260.8529
 LVEF0.1220.3715
 TR-PG0.1440.3001
  • Clinical data for each parameters are described in table 1.

  • 6MWT, 6 min walk test; BMI, body mass index; %FEV1, per cent predicted FEV1; FEV1, forced expiratory volume in 1 s; %FVC, per cent predicted FVC; FVC, forced vital capacity; IC, inspiratory capacity; LVCI, left ventricular cardiac index; LVCO, left ventricular cardiac output; LVDd, left ventricular diastolic diameter; LVDs, left ventricular systolic diameter; LVEDV, left ventricular end diastolic volume; LVEDVI, left ventricular end diastolic volume index; LVEF, left ventricular ejection fraction; LVESV, left ventricular end systolic volume; LVESVI, left ventricular end systolic volume index; LVSV, left ventricular stroke volume; MDCT, multidetector CT; RVCI, right ventricular cardiac index; RVCO, right ventricular cardiac output; RVEDV, right ventricular end diastolic volume; RVEDVI, right ventricular end diastolic volume index; RVEF, right ventricular ejection fraction; RVESV, right ventricular end systolic volume; RVESVI, right ventricular end systolic volume index; RVSV, right ventricular stroke volume; TR-PG, tricuspid regurgitation-pressure gradient.