Table 2.
Baseline characteristics of trial participants
| Characteristic | 6-month group | 12-month group | 24-month group |
|---|---|---|---|
|
Baseline allocation |
125 |
122 |
122 |
|
Age (years ) |
|
|
|
| Mean (SD) |
37.1 (10.4) |
39.6 (10.8) |
36.4 (10.6) |
|
Gender |
|
|
|
| N (%) Male |
57 (45.6) |
43 (35.2) |
34 (27.9) |
|
IMD Quintilea |
|
|
|
| N (%) |
|
|
|
| 1 Most Deprived |
40 (32.0) |
40 (32.8) |
34 (27.9) |
| 2 |
29 (23.2) |
29 (23.8) |
30 (24.6) |
| 3 |
18 (14.4) |
18 (14.8) |
24 (19.7) |
| 4 |
24 (19.2) |
21 (17.2) |
21 (17.2) |
| 5 Least Deprived |
14 (11.2) |
14 (11.5) |
13 (10.7) |
|
Smoking historyb |
|
|
|
| N (%) |
|
|
|
| Never |
83 (66.4) |
70 (57.4) |
71 (58.2) |
| Past |
21 (16.8) |
31 (25.4) |
29 (23.8) |
| Current |
12 (9.6) |
15 (12.3) |
15 (12.3) |
| Missing |
8 |
6 |
7 |
|
No. of Teeth present |
|
|
|
| Mean (SD) |
27.8 (2.4) |
27.8 (2.1) |
27.6 (2.3) |
| Missing |
0 |
1 |
0 |
|
Decayed Teeth |
|
|
|
| N (%) any |
9 (37.5) |
8 (33.3) |
7 (29.2) |
| Missing |
0 |
1 |
0 |
|
Filled Teeth |
|
|
|
| Mean (SD) |
7.7 (4.5) |
7.7 (4.7) |
6.8 (4.3) |
| Missing | 0 | 1 | 0 |
a IMD derived from participants’ postcodes. Quintiles based on national standards.
b Self reported smoking status. For participants recruited 02/2006 – 09/2006 these data were reported retrospectively, at the 12-month recall. For all other patients, smoking data were reported at baseline.