HRQOL is an important aspect in the decision-making and advising process for patients with prostate cancer. In many aspects of HRQOL, AS is associated with more favourable outcomes than RP within the first 1-2 years after diagnosis in our observational design, although the differences were not clinically significant. The result that HRQOL in AS patients is at least as high as in RP patients should be considered when advising patients about the different treatment options for low-risk localised prostate cancer.