Chen, M.I., Chow, A.L., Earnest, A. et al. (2006). Clinical and Epidemiological Predictors of Transmission in Severe Acute Respiratory Syndrome (SARS). BMC Infectious Diseases. 6:151.
The authors looked at factors contributing to SARS transmission in 98 index cases (22 with transmission; 76 without). They found several factors that seemed to contribute to transmission including delay to isolation; admission to a non-isolation facility; and higher lactate dehydrogenase levels of greater than 650 IU/L.