The influence of symptoms of disease and side effects of treatment on compliance with cancer therapy.

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Abstract
To provide a systematic analysis of how adverse symptoms of disease and side effects of cancer therapy relate to patient noncompliance with treatment, we interviewed 107 patients with hematologic malignancies at the initiation of therapy and 6 months later to collect information on the type, frequency, and difficulty of unpleasant physical effects experienced. Level of compliance was monitored (biochemically and with self-report) on a monthly basis for oral self administration of allopurinol and prednisone. Appointment-keeping to receive infused chemotherapy was also monitored. Nausea was the most frequent side effect experienced. Nausea, fever, and pain were the most difficult physical effects to tolerate when they occurred. Complex treatment regimens and severe diseases related to reports of more physical effects. Younger patients had a more difficult time dealing with these effects than did older patients. Neither the occurrence, frequency, or difficulty dealing with any of the effects related to noncompliance with either of the two self-administered medications. Difficulty with particular effects did relate to noncompliance with clinic appointments to receive infused chemotherapy.