Clinical characteristics of laboratory-positive cases by infecting dengue virus (DENV)-type, Puerto Rico, 2010.

Relative risk ratios (RR) were calculated with 95% confidence intervals (CI) for the indicated outcomes for case-patients infected with DENV-1, DENV-2, or DENV-4. Bolded data indicate a significant risk in the indicated outcome associated with infection with the indicated DENV-type. DHF = dengue hemorrhagic fever.*based on a sample of 818 RT-PCR-positive specimens that were tested for evidence of primary infection; denominators for DENV-1, -2 and -4 are 520, 73, and 225, respectively.