Table 1.
Demographic characteristics of the final samples included in the analysis
| GLIDE Sweden | KNHANES | ||
|---|---|---|---|
| Cross‐sectional | Longitudinal | ||
| Included participants with baseline observations (N) | 28 691 | 28 244 | 33 831 |
| Follow‐up observations (N) | 232 905 | ||
| Total observations(N)a | 261 149 | ||
| Time at risk (y) | |||
| Median per‐participant | 11.7 | ||
| Total | 298 120 | ||
| Sex, % male | 49.1 | 49.2 | 49.4 |
| Age, years at study baseline (mean [SD]) | 49.7 (8.6) | 45.0 (8.9) | 49.2 (16.5) |
| Proportions in age groups | |||
| Under 45 y | 35.1 | 35.1 | 42.8 |
| 45‐54.9 y | 34.1 | 34.1 | 19.2 |
| 55 y and older | 30.8 | 30.8 | 38.0 |
| Dental status at baseline | |||
| Missing teeth (mean [SD]) | 2.0 (3.2) | 1.8 (3.0) | 0.71 (6.0) |
| DFS (mean [SD]) | 33.3 (19.3) | 31.4 (19.2) | 11.8 (12.0) |
| DMFS (mean [SD]) | 43.2 (25.9) | 40.1 (25.2) | 22.5 (22.7) |
| CPI ≥3 (%) | 52.0 | 51.8 | 27.7 |
| Smoking status | |||
| Current smoker | 12.3 | 12.2 | 20.5 |
| Not current smoker | 87.7 | 87.8 | 79.5 |
| Education, % University level | 26.9 | 26.9 | 29.6 |
CPI, community periodontal index; DFS, decayed and filled surfaces; GLIDE, Gene‐Lifestyle Interactions and Dental Endpoints Study; KNHANES, Korea National Health and Nutrition Examination Survey.
a
Total observations is the sum of baseline and follow‐up observations included in longitudinal modelling.