Table 5. Duration from the onset of warning signs to dengue hemorrhagic fever (DHF) and severe dengue (SD).

Warning signs	Days to DHF*	Days to SD*
Abdominal pain or tenderness	1 (1–4)	2 (8–2)
Persistent vomiting	2 (1–6)	2 (1–5.7)
Hepatomegaly	3 (3–3.9)	1.5 (1–2)
Hematocrit rise and rapid platelet count drop	1 (1–3)	3 (1–7.6)
Clinical fluid accumulation	2 (1–5)	3 (1–8)
Mucosal bleeding	2 (1–4)	2 (1–8.5)
Lethargyx	2 (1–5)	3 (1–8)

^*Median (5^th–95^th percentiles),

^xYears 2007 and 2008 cohorts only.