Table 3 Calculation of aggregate variables for gingivitis, periodontitis and caries (DMF) spanning all registrations
1972–1987 | 1988–1999 | 2000–2021 | ||
|---|---|---|---|---|
Gingivitis | Yes | Gingivitis index ≥ 9 | Gingivitis level ≥ 6 | Gingivitis level ≥ 6 |
No | Gingivitis index < 9 | Gingivitis index < 6 | Gingivitis index < 6 | |
Periodontitis | Yes | Pathological pockets = X | Registered pockets ≥ 6 | Registered pockets ≥ 6 |
No | Pathological pockets = NA | Registered pockets < 6 | Registered pockets < 6 | |
Caries (DMF) | Temporary dentition (dmf_s) | Sum of surfaces with caries codes 1, 2, 4 or 6 (flade_1_1, flade_2_1, flade_4_1, flade_6_1) | Sum of surfaces with caries codes 1, 2, 4, 5 or 6 | Sum of surfaces with caries codes 1, 2, 4, 5 or 6 |
Permanent dentition (DMF_S) | Sum of surfaces with caries codes 1, 2, 4 or 6 | Sum of surfaces with caries codes 1, 2, 4 or 6 | Sum of surfaces with caries codes 1, 2, 4 or 6 |