Table 4.
Characteristics of the Cases and Controls
| Characteristic | Cases (n=607) | Controls (n=6070) |
|---|---|---|
| Sex | ||
| Male | 274 (45) | 2740 (45) |
| Female | 333 (55) | 3330 (55) |
| Age (years) | ||
| 18–24 | 23 (4) | 230 (4) |
| 25–34 | 48 (8) | 480 (8) |
| 35–44 | 78 (13) | 780 (13) |
| 45–54 | 129 (21) | 1290 (21) |
| 55–64 | 128 (21) | 1280 (21) |
| 65–74 | 99 (16) | 990 (16) |
| 75–84 | 77 (13) | 770 (13) |
| ≥ 85 | 25 (4) | 250 (4) |
| Event year | ||
| 2001 | 6 (1) | 60 (1) |
| 2002 | 23 (4) | 230 (4) |
| 2003 | 35 (6) | 350 (6) |
| 2004 | 51 (8) | 510 (8) |
| 2005 | 112 (18) | 1120 (18) |
| 2006 | 105 (17) | 1050 (17) |
| 2007 | 117 (19) | 1170 (19) |
| 2008 | 128 (21) | 1280 (21) |
| 2009 | 30 (5) | 300 (5) |
| Comorbidities | ||
| Myocardial infarction | 73 (12) | 194 (3) |
| Congestive heart failure | 154 (25) | 367 (6) |
| Peripheral vascular disease | 71 (12) | 257 (4) |
| Cerebrovascular disease | 114 (19) | 529 (9) |
| Dementia | 15 (2) | 69 (1) |
| Chronic pulmonary disease | 233 (38) | 1298 (21) |
| Rheumatologic disease | 41 (7) | 141 (2) |
| Peptic ulcer disease | 42 (7) | 112 (2) |
| Mild liver disease | 28 (5) | 11 (0) |
| Mild-to-moderate diabetes mellitus | 153 (25) | 775 (13) |
| Hemiplegia or paraplegia | 9 (1) | 29 (0) |
| Moderate or severe renal disease | 86 (14) | 152 (3) |
| Diabetes with complications | 47 (8) | 166 (3) |
| Malignancy | 164 (27) | 565 (9) |
| Moderate-to-severe liver disease | 17 (3) | 1 (0) |
| Metastatic solid tumor | 62 (10) | 111 (2) |
Data are no. (%) of patients.