Two studies from the JP Wilmot Cancer Center on the relationship of treatment, expectations, and race with post-treatment skin reactions reported by cancer patients

Abstract

18560 Background: Cancer patients may experience skin problems while undergoing treatment. Frequency of skin reactions may be influenced skin pigmentation and/or psychological factors. Methods: A Symptom Inventory (SI) completed by 411 cancer patients nationwide before and after treatment was analyzed to determine if treatment type, race (Black versus White), and pre-treatment expectations influenced post-treatment skin reactions. Subsequent analysis of a SI completed weekly for five weeks by 167 local patients receiving radiotherapy examined severity of reported skin reactions. Results: One-way between-group ANOVA, with Bonferroni correction, showed significantly more patients receiving radiotherapy had stronger expectations of skin problems (62%) compared to patients receiving chemotherapy (40%, p = 0.001) or chemotherapy plus radiotherapy (45%, p = 0.003). Overall, expectations did not correlate with patient reported skin problems post-treatment (Spearman’s rho = 0.02, p = 0.70). Likewise, a Kruskal Wallis test showed no significant difference in severity of skin reactions reported by patients receiving radiotherapy (n = 138) and/or chemotherapy (n = 273, p = 0.56). Severe skin problems were reported more frequently by 10/18 (56%) Blacks than 90/393 (23%) Whites (p = 0.001), although no significant difference was found between Blacks and Whites in their pre-treatment expectations of skin problems (p = 0.32). Further, pre-treatment expectations of skin problems did not influence post-treatment reporting of skin problems in Blacks (Spearman’s rho = −0.02, p = 0.93) or Whites (Spearman’s rho = 0.02, p = 0.65). Similarly, the local study showed that significantly more Blacks (38%) reported severe skin reactions at the treatment site than Whites (6%). Total radiation exposure was significantly related to the severity of skin problems reported by Blacks (Spearman’s rho = 0.90, p = 0.04), but not Whites (Spearman’s rho = −0.06 p = 0.52). Conclusions: Overall, Blacks reported more severe post-treatment skin problems than Whites. How this self-reported skin damage correlates with clinical findings remains to be determined. Supported by NCI PHS grants 1R25CA102618 and U10CA37420. No significant financial relationships to disclose.