In multivariable analysis, factors independently associated with 30-day mortality included age greater than 60 years old (odds ratio [OR] = 7.2, 95% confidence interval [95% CI] = 1.26–41.6, P = 0.026), cancer diagnosis (OR = 9.6, 95% CI = 1.4–65.7, P = 0.02), and MRSA isolate carriage of tst-1 (OR = 62.5, 95% CI = 12.0–325.2, P < 0.001). This evidence concerns the gene CCDC6 and cancer.