Table 3.

Sensitivity of the various disease classification systems in 152 patients with confirmed acute dengue virus infection.*

Criteria used for the classification of DHF patients	Number of patients with circulatory failure (n = 66) classified as DHF	Sensitivity (95% CI)
WHO classification system	57	86 (76–94)
Bleeding and thrombocytopenia	59	89 (79–96)
Bleeding and haemoconcentration	58	88 (78–95)
Haemoconcentration and Thrombocytopenia	63	96 (87–99)
Bleeding and thrombocytopenia or haemoconcentration	60	91 (81–97)
Thrombocytopenia and haemoconcentration or bleeding	65	99 (92–100)
Haemoconcentration and bleeding or thrombocytopenia	64	97 (89–100)

* n, denotes number; CI, denotes confidence interval; DF, denotes dengue fever; DHF, denotes dengue haemorrhagic fever; WHO, denotes World Health Organization.