Correlations between the Minnesota Living with Heart Failure(MLHF) and the various noninvasive and invasive parameters
| Strength of correlation (range of r) | MLHF | ||||
| Score | Physical subscore | Emotional subscore | |||
| All patients# | |||||
| Little or none (<0.20) | RVSP, RAP, mPAP | RVSP, mPAP | 6-MWD, RVSP, mPAP | ||
| Weak (0.20–0.39) | 6-MWD, cardiac index | RAP | Cardiac index, Sv,O2 | ||
| Moderate (0.40–0.59) | Borg, Sv,O2 | NYHA, 6-MWD, Borg, cardiac index, Sv,O2 | Borg | ||
| Moderately strong (0.60–0.79) | NYHA | NYHA | |||
| PAH patients¶ | |||||
| Little or none (<0.20) | RVSP, mPAP | RVSP, mPAP | RVSP, mPAP | ||
| Weak (0.20–0.39) | 6-MWD, Borg, cardiac index, Sv,O2 | Borg | 6-MWD, Borg, RAP, cardiac index, Sv,O2 | ||
| Moderate (0.40–0.59) | NYHA, RAP | 6-MWD, RAP, cardiac index, Sv,O2 | NYHA | ||
| Moderately strong (0.60–0.79) | NYHA | ||||
| CTEPH patients+ | |||||
| Little or none (<0.20) | RAP | 6-MWD, RVSP, RAP | |||
| Weak (0.20–0.39) | 6-MWD, RVSP, mPAP | RVSP, mPAP | mPAP, cardiac index, Sv,O2 | ||
| Moderate (0.40–0.59) | NYHA, cardiac index, Sv,O2 | NYHA, 6-MWD, Borg, cardiac index, Sv,O2 | Borg | ||
| Moderately strong (0.60–0.79) | Borg | NYHA | |||
Data are presented as strength of correlation according to Spearman's r (see Methods section). PAH: pulmonary arterial hypertension; CTEPH: chronic thromboembolic pulmonary hypertension RVSP: right ventricular systolic pressure over right atrial pressure; RAP: right atrial pressure; mPAP: mean pulmonary arterial pressure; 6-MWD: 6-min walking distance; Sv,O2: mixed venous oxygen saturation; NYHA: New York Heart Association. #: n = 48; ¶: n = 26; +: n = 22.