Table 1. Characteristics of the KBD cases and controls.
Characteristics | Cases(n = 638) | Controls(n = 324) |
Age, mean ± SD | 53.3±13.07 | 54.5±15.81 |
Sex, male/female | 244/394 | 157/167 |
Degree | ||
I | 241 | – |
II | 336 | – |
III | 60 | – |
IV | 1 | – |
Characteristics | Cases(n = 638) | Controls(n = 324) |
Age, mean ± SD | 53.3±13.07 | 54.5±15.81 |
Sex, male/female | 244/394 | 157/167 |
Degree | ||
I | 241 | – |
II | 336 | – |
III | 60 | – |
IV | 1 | – |