The 840 patients assessed had a median follow-up of 66 months. The alternative-medicine cohort had a significantly worse 5-year survival rate (54.7% versus 78.3%.
With respect to the individual types of cancer, alternative medicine was associated with significantly worse 5-year survival rates for breast cancer (58.1% versus 86.6%, P<0.001); lung cancer (19.9% versus 41.3%, P<0.001); and colorectal cancer (32.7% versus 79.4%, P<0.001). The 5-year survival rate did not differ significantly for prostate cancer (86.2% versus 91.5%, P=0.36).
The study and control groups did not differ significantly with respect to cancer type, age, clinical stage, comorbidity score, insurance type, race, or year of diagnosis.