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intervention dose were examined. Dose variables included participation frequency, amount, and duration. Outcome variables were QoL (Kansas City Cardiomyopathy Questionnaire) and healthcare use (hospital/emergency department days). Linear mixed models were used to model dose effects for ''completers'' vs. ''non-completers.'' Results. Of 208 ENABLE CHF-PC patients randomized to receive the intervention, 81 (38.9%) were classified as ''completers'' with a mean age of 64.6; 72.8% were urban-dwelling; 92.5% had NYHA Class III HF. There were no significant baseline differences between ''completers'' and ''non-completers.'' Positive associations were found between telephone session completion and age (rs ¼0.13, p<0.05); significant associations were found between frequency and NYHA Class (rs ¼0.40, p<0.05) and baseline QoL (rs ¼-0.19, p<0.05). Moderate, clinically-significant, improved QoL differences were found at 16-weeks in ''completers'' vs ''non-completers'' (between-group difference:-9.71 (3.18), d¼0.47, p¼0.002) but not healthcare use. However, results were inconsistent with matched analysis using control participants. Conclusion. Higher completion rates of a HF early palliative care intervention may have beneficially affected QoL for patients with advanced HF.