Table 1.
Demographic characteristics of cases and controls.
| Variable | Cases | Controls |
|---|---|---|
| Sex | ||
| Male—n (%) | 136 (30.49) | 136 (30.49) |
| Female—n (%) | 310 (69.51) | 310 (69.51) |
| Age—mean ± s.d. (years) | 46.71 ± 10.84 | 45.44 ± 10.13 |
Note: s.d.: standard deviation.
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