Table 1.
Distribution of participants by age, gender, and examination site (number (%)).
| Participants | Age groups (years) | Gender groups | |||||
|---|---|---|---|---|---|---|---|
| Area | Number | 50–59 | 60–69 | 70–79 | ≥80 | Male | Female |
| Rushan | 4994 | 2138 (42.81) | 1376 (27.55) | 1077 (21.57) | 403 (8.07) | 2169 (43.43) | 2825 (56.57) |
| Huaiyin | 3040 | 1721 (56.61) | 727 (23.91) | 427 (14.05) | 165 (5.43) | 1374 (45.20) | 1666 (54.80) |
| Tengzhou | 4916 | 2293 (46.64) | 1357 (27.60) | 1006 (20.46) | 260 (5.29) | 2183 (44.40) | 2733 (55.60) |
| Juancheng | 4866 | 2271 (46.67) | 1727 (35.49) | 655 (13.46) | 213 (4.38) | 2077 (42.68) | 2789 (57.32) |
| Total | 17816 | 8423 (47.28) | 5187 (29.11) | 3165 (17.76) | 1041 (5.84) | 7803 (43.80) | 10013 (56.20) |