Table 1.
Incidence of Tooth Loss at Each Cycle during Follow-up (N = 18,798 Teeth)
| Through cycle* (interval) |
No. of years after baseline |
No. of persons present at the beginning of interval |
No. of teeth present at the beginning of interval |
No. of teeth lost during interval (incidence†) |
No. of teeth censored‡ |
|---|---|---|---|---|---|
| 1-2 | 0-3 | 791 | 18,798 | 468 (2.5) | 1,580 |
| 2-3 | 3-6 | 709 | 16,750 | 418 (2.5) | 1,024 |
| 3-4 | 6-9 | 658 | 15,308 | 406 (2.7) | 1,299 |
| 4-5 | 9-12 | 589 | 13,603 | 286 (2.1) | 973 |
| 5-6 | 12-15 | 541 | 12,344 | 257 (2.1) | 1,591 |
| 6-7 | 15-18 | 468 | 10,496 | 328 (3.1) | 1,567 |
| 7-8 | 18-21 | 390 | 8,601 | 198 (2.3) | 1,207 |
| 8-9 | 21-24 | 327 | 7,196 | 117 (1.6) | 2,417 |
| 9-10 | 24-27 | 208 | 4,662 | 106 (2.3) | 3,969 |
| ≥10 | ≥27 | 26 | 587 | 5 (0.01) | 582 |
| Total | -- | -- | -- | 2,589 | 16,209 |
*
For example, Cycle 1 - 2 approximates to years 0 - 3 after baseline
†
Incidence of tooth loss is calculated as “No. of teeth lost during interval / No. of teeth present at the beginning of interval”
‡
Censored: data collection ended, or participants withdrew or were lost to follow-up