Recently, in a randomized study, Myrer et al7 compared treatment with paraffin bath and paraffin bath combined with topical analgesic for patients with symptomatic hand osteoarthritis. Results indicated that both treatments produced immediate posttreatment relief of pain, albeit not to a great extent. After 12 treatments, the researchers concluded that the addition of topical analgesic to the paraffin bath produced significantly greater pain relief at rest and during movement and greater improved function than paraffin baths alone7; however, their study did not include a control group. In our RCT, we found that paraffin bath therapy, without the addition of topical analgesic, did reduce pain, but had no statistically significant effect on hand function when compared with the control group. We had anticipated a medium-sized effect, but we observed that the improvement was not as significant as we had initially expected.