Table 3. Crude and adjusted* Odds Ratio of the association of Dengue Hemorrhagic Fever with chronic co-morbidities.
| Exposure | Cases | Controls | Matched OR crude ** | 95% CI | OR Adjust | 95% CI |
| Hypertension | ||||||
| No | 150 | 1,027 | 1 | 1 | ||
| Yes | 20 | 148 | 0.90 | 0.50–1.62 | 0.93 | 0.51–1.70 |
| Diabetes | ||||||
| No | 161 | 1,144 | 1 | 1 | ||
| Yes | 9 | 31 | 2.46 | 1.03–5.87 | 2.75 | 1.12–6.73 |
| Allergy | ||||||
| No | 112 | 896 | 1 | 1 | ||
| Yes | 58 | 279 | 1.59 | 1.11–2.28 | 1.29 | 0.87–1.89 |
| Asthma | ||||||
| No | 160 | 1,113 | 1 | 1 | ||
| Yes | 10 | 62 | 0.93 | 0.46–1.89 | 0.87 | 0.41–1.84 |
*Adjusted Odds Ratio were obtained from a multivariate conditional logistic regression with hypertension, diabetes, allergy, and asthma being adjusted by selected self-reported skin color, income and education.
**Matched OR and 95 CI calculated using McNemar's test.