Table 1.
Age-38 dental caries, tooth loss and periodontal disease experience and plaque control habits by ordinal categories of standardised childhood IQ score (brackets contain standard deviations unless otherwise indicated)
| Standardised childhood IQ score: | |||||
|---|---|---|---|---|---|
| 41–84 | 85–99 | 100–114 | 115–141 | All | |
| Number (%) | 106 (13.0) | 287 (35.1) | 298 (36.4) | 127 (15.5) | 818 (100.0) |
| Dental caries/tooth loss | |||||
| Mean coronal DMFT | 9.9 (5.7) | 9.1 (5.2) | 8.1 (5.2) | 7.8 (5.3)a | 8.7 (5.3) |
| Mean coronal DT | 2.0 (3.6) | 1.2 (2.2) | 0.8 (1.7) | 0.6 (2.2)a | 1.1 (2.2) |
| Mean coronal MT | 1.7 (2.6) | 1.0 (1.8) | 0.7 (1.7) | 0.6 (2.2)a | 0.9 (2.0) |
| Mean coronal FT | 6.2 (4.2) | 6.9 (4.5) | 6.7 (4.4) | 6.8 (4.7) | 6.7 (4.5) |
| Mean root DS | 1.4 (8.3) | 0.7 (2.7) | 0.3 (1.5) | 0.5 (1.7)a | 0.6 (3.6) |
| Mean root DFS | 1.6 (8.3) | 1.0 (3.1) | 0.5 (1.8) | 0.8 (2.2) | 0.9 (3.8) |
| 1+ missing teeth (%) | 53 (50.0) | 107 (37.3) | 82 (27.5) | 27 (21.3)a | 269 (32.9) |
| 3+ missing teeth (%) | 28 (26.4) | 40 (13.9) | 25 (8.4) | 7 (5.5)a | 100 (12.2) |
| 1+ coronal DT (%) | 55 (51.9) | 126 (43.9) | 96 (32.2) | 26 (20.5)a | 303 (37.0) |
| Periodontal statusb | |||||
| 1+ sites, 5+mm ALc (%) | 35 (33.0) | 70 (24.4) | 54 (18.1) | 18 (14.2)a | 177 (21.6) |
| 1+ sites, 6+mm ALc (%) | 20 (18.9) | 39 (13.6) | 26 (8.7) | 8 (6.3)a | 93 (11.4) |
| Extent of 5+mm AL | 4.0 (10.9) | 3.2 (11.9) | 1.1 (5.0) | 0.6 (2.4)a | 2.1 (8.7) |
| Extent of BOPd | 33.0 (28.4) | 23.3 (22.3) | 19.1 (20.1) | 16.6 (18.1)a | 22.0 (22.3) |
| Plaque control and self-care | |||||
| Mean OHI-S score | 1.0 (0.7) | 0.7 (0.6) | 0.6 (0.5) | 0.5 (0.4)a | 0.7 (0.5) |
| High plaque trajectory (%) | 29 (27.4) | 36 (12.5) | 17 (5.7) | 2 (1.6)a | 84 (10.3) |
| Brush twice daily (%)e | 42 (41.2) | 156 (55.1) | 188 (63.7) | 88 (69.3)a | 474 (58.7) |
| Floss daily (%) | 6 (5.7) | 20 (7.0) | 34 (11.4) | 20 (15.7)a | 88 (9.9) |
| Current smoker (%)f | 43 (41.0) | 88 (30.7) | 54 (18.1) | 21 (16.5)a | 206 (25.2) |
a
P<0.05
b
Data missing for 17 individuals who could not be periodontally examined for medical reasons
c
% of sites with 5+mm attachment loss
d
% of teeth showing bleeding on probing (BOP) during the periodontal assessment
e
Data missing for 11 individuals
f
Data missing for 1 individual