Summary of the patient and infection characteristics.

The percentages shown within brackets are the proportion of primary and secondary infections in respective clinical categories (DF and DHF/DSS). *Exact binomial test was used to calculate any differences in association of either primary or secondary infection status with clinical outcome. Remaining p-values shown in the table were calculated using the Student’s t-test. §Crossing point values were generated from the real-time quantitative PCR assay for DENV serotyping and were used as a surrogate marker of virus titres in patient sera [24]. DF = dengue fever; DHF = dengue hemorrhagic fever; DSS = dengue shock syndrome; std = standard deviation Summary of the patient and infection characteristics.