Table 1.
1968/69 | 1980/81 | 1992/93 | 2004/05 | ||
---|---|---|---|---|---|
Age 38 |
Participants |
356 |
109 |
67 |
207 |
Participation rate |
87.5% |
75.2% |
72.8% |
59.5% |
|
Mean number of teeth |
22.2 |
24.9 |
28.1 |
29.0 |
|
Median |
24.0 |
27.0 |
28.0 |
29.0 |
|
|
SD |
7.0 |
5.9 |
2.2 |
2.5 |
Age 50 |
Participants |
390 |
323 |
98 |
293 |
Participation rate |
89.4% |
76.4% |
77.2% |
57.7% |
|
Mean number of teeth |
14.6 |
20.9 |
23.9 |
27.3 |
|
Median |
17.0 |
23.0 |
26.0 |
28.0 |
|
SD | 9.6 | 7.2 | 6.2 | 3.3 |
*Statistically significant differences (p < 0.05) concerning mean number of remaining teeth between all examinations and age groups except between 1992/93 and 2004/05 for the 38-year-olds.
The analyses of variance method was applied including a post-hoc analysis (LSD).