Table 4.

Proportion of patients without circulatory failure and classified as DF according to WHO criteria, that is reclassified to DHF when the various modified classification systems are applied.*

Criteria used for the classification of DHF patients	Number of DF patients without circulatory failure reclassified to DHF	Proportion (95% CI)
Bleeding and thrombocytopenia	5	45 (17–77)
Bleeding and haemoconcentration	1	9 (0–41)
Haemoconcentration and Thrombocytopenia	2	18 (2–52)
Bleeding and thrombocytopenia or haemoconcentration	6	55 (23–83)
Thrombocytopenia and haemoconcentration or bleeding	7	64 (31–89)
Haemoconcentration and Bleeding or thrombocytopenia	3	27 (6–61)

* DF, denotes dengue fever; DHF, denotes dengue haemorrhagic fever; WHO, denotes World Health Organization.