Reduced intensity conditioning and oral care measures prevent oral mucositis and reduces days of hospitalization in allogeneic stem cell transplantation recipients.

Oral mucositis (OM) is a side effect of intensive chemotherapy and radiation and has been reported to affect 75-100% of hematopoietic stem cell transplantation (HSCT) recipients. The purpose of this study was to compare the incidence of OM in patients conditioned with myeloablative conditioning (MAC) to reduced-intensity conditioning (RIC) and to determine the effect of a new oral care protocol. The study involved 171 HSCT recipients, with hematological malignancies transplanted between 2007 and 2011. Median age of the patients was 50 years (range 12-71). Ninety-nine (58%) received RIC and 72 received MAC. Clinical features of OM were recorded from day -3 before to day +25 after HSCT using the World Health Organization (WHO) scoring system and the oral mucositis assessment score (OMAS). Overall, 87% of the patients developed OM of any severity, which peaked on days 10-11. The mean WHO score was 1.7. In multivariate analysis, the severity of OM was associated with MAC (relative hazard (RH) 1.57, 95% confidence interval (CI) 1.37-1.80, p < 0.001), all donor-recipient gender combinations except female-to-male (RH = 1.26, 95% CI 1.10-1.4, p = 0.001), and early year of HSCT (RH = 0.84, 95%CI 0.7-0.96, p = 0.013). There was a correlation between long hospitalization and OM (day 15, r = 0.31, p < 0.001). There was a good correlation between the WHO and OMAS scoring systems for OM (r = 0.74, p < 0.001). Oral mucositis was reduced in patients treated with RIC and in patients treated during recent years, when oral care was intensified. Increased scores of OM prolonged hospitalization.