Table 1.
Summary of characteristics of study subjects
| Cases (n=638) | Controls(n=546) | |
|---|---|---|
| Age (years), mean±S.D. | 59.4±9.8 | 63.2±8.2 |
| Gender, n (%) | ||
| Male | 510 (79.9) | 401 (73.4) |
| Female | 128 (20.0) | 145 (26.6) |
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