Results
There were 490 cases of DHF and 1,316 controls. Among adults, progression to DHF was
associated with self-reported hypertension (OR = 1.6; 95% CI 1.1-2.1) and skin allergy (OR
= 1.8; 95% CI 1.1-3.2) with DHF after adjusting for ethnicity and socio-economic variables.
There was no statistically significant association between any chronic disease and progression
to DHF in those younger than 15 years.