Table 1.

Demographic and clinical characteristics of the study population by dengue virus infection status.

Dengue cohort (n = 12,573)Non-dengue cohort (n = 62,865)Standardized mean difference
Sex
 Female6,250 (49.7)31,250 (49.7)
 Male6,323 (50.3)31,615 (50.3)
Age
 0–171,222 (9.7)6,110 (9.7)
 18–352,829 (22.5)14,145 (22.5)
 36–503,279 (26.1)16,395 (26.1)
 51–653,635 (28.9)18,175 (28.9)
 ≧661,608 (12.8)8,040 (12.8)
Area of residence
 Tainan2,408 (19.2)12,040 (19.2)
 Kaohsiung8,479 (67.4)42,395 (67.4)
 Pingtung678 (5.4)3,390 (5.4)
 Others1,008 (8.0)5,040 (8.0)
Urbanization level
 1 (highest)4,462 (35.5)15,700 (25.0)0.2372
 25,609 (44.6)21,677 (34.5)0.2111
 31,757 (14.0)15,049 (23.9)0.2378
 4–7 (lowest)745 (5.9)10,439 (16.6)0.2929
Monthly income level
 Unemployed5,183 (41.2)22,873 (36.4)0.1001
 Low3,537 (28.1)20,982 (33.4)0.1120
 High3,853 (30.7)19,010 (30.2)0.0088
Comorbidity
 COPD690 (5.5)3,070 (4.9)0.0278
 Hypertension2,663 (21.2)11,566 (18.4)0.0711
 Hyperlipidemia1,731 (13.8)6,826 (10.9)0.0914
 Peptic ulcer disease2,055 (16.3)8,844 (14.1)0.0647
 Diabetes1,291 (10.3)5,668 (9.0)0.0432