Fig. 1
From: Association of HIV infection with clinical and laboratory characteristics of sickle cell disease
Study sampling. The six Recipient Epidemiology and Donor Evaluation Study (REDS-III) centers were actively treating 9676 sickle cell disease (SCD) patients in 2013 and 2793 were included in the cohort from 2013 to 2015. Out of 23 with SCD and HIV infection identified in the participating centers, 15 were included in this study; of these, 7 were participating in the SCD cohort and 8, were not. Sixty HIV negative participants included in the cohort matched by sex, age, REDS-III center, and SCD genotype were randomly selected to compare SCD outcomes between HIV positive and HIV negative individuals