Table 3 Age-standardized percentage of oral hygiene and the periodontal status in the Dutch population from the Dutch National Oral Health Survey 1995–2013
Age-standardized percentage (95% CI) | 1995 (n = 917) | 2002 (n = 795) | 2007 (n = 669) | 2013 (n = 702) |
|---|---|---|---|---|
Oral hygiene | ||||
 OHI-S = 0 | 12.7 (10.5–14.9) | 8.9 (7.0–10.9) | 20.6 (17.5–23.7) | 28.1 (24.8–31.5) |
 OHI-S = 1 | 46.2 (42.9–49.4) | 49.8 (46.4–53.3) | 56.8 (53.0–60.6) | 60.9 (57.3–64.5) |
 OHI-S = 2, 3 | 41.1 (37.9–44.4) | 41.2 (37.8–44.6) | 22.6 (19.4–25.8) | 10.9 (8.6–13.2) |
Periodontal status | ||||
 PDI = 0 | 51.4 (48.1–54.7) | 46.5 (43.0–49.9) | 56.3 (52.6–60.0) | 60.6 (57.0–64.1) |
 PDI = 1 | 42.0 (38.8–45.3) | 45.0 (41.6–48.5) | 36.8 (33.1–40.5) | 34.0 (30.5–37.5) |
 PDI = 2 | 6.5 (4.9–8.2) | 8.5 (6.6–10.4) | 6.9 (5.1–8.7) | 5.4 (3.7–7.0) |