Table 4.
Longitudinal study demographics and disease characterization
| Population group |
A. actinomycetemcomitans positive |
A. actinomycetemcomitans negative |
≥1 sitea |
≥2 sitesa |
Bone lossb |
|||||
|---|---|---|---|---|---|---|---|---|---|---|
| No. of subjects | Age (mean ± SD) (yr) | No. of subjects | Age (mean ± SD) (yr) | No. of subjects (no. of A. actinomycetemcomitans positive) | Age (mean ± SD) (yr) | No. of subjects (no. of A. actinomycetemcomitans positive) | Age (mean ± SD) (yr) | No. of subjects (no. of A. actinomycetemcomitans positive) | Age (mean ± SD) (yr) | |
| Ethnic group | ||||||||||
| Hispanic | ||||||||||
| Female | 14 | 12.9 ± 1.1 | 16 | 12.4 ± 1.4 | 7 (6) | 13.4 ± 1.0 | 4 (4) | 13.8 ± 0.96 | 3 (3) | 14.0 ± 1.0 |
| Male | 14 | 12.8 ± 0.9 | 16 | 12.9 ± 1.4 | 2 (2) | 14.0 ± 1.4 | 0 | 0 | 0 | |
| Total | 28 | 12.9 ± 1.5 | 32 | 12.7 ± 1.4 | 9 (8) | 13.5 ± 1.1 | 4 (4) | 13.8 ± 0.96 | 3 (3) | 14.0 ± 1.0 |
| African-American | ||||||||||
| Female | 15 | 12.7 ± 2.3 | 18 | 12.3 ± 1.4 | 8 (7) | 12.5 ± 1.2 | 2 (2) | 14.5 ± 2.1 | 5 (5) | 14.6 ± 1.5 |
| Male | 16 | 12.5 ± 0.9 | 21 | 12.6 ± 1.7 | 6 (5) | 13.5 ±.71 | 2 (2) | 13.5 ± 0.70 | 6 (6) | 14.3 ± 1.8 |
| Total | 31 | 12.6 + 1.7 | 39 | 12.5 ± 1.4 | 14 (12) | 12.9 ±.96 | 4 (4) | 14.0 ± 1.4 | 11 (11) | 14.4 ± 1.6 |
| Not reported | ||||||||||
| Female | 2 | 12.0 ± 1.0 | 0 | 0 | 0 | 2 (2) | 12.5 ± 0.50 | |||
| Male | 2 | 13.0 ± 1.0 | 0 | 0 | 0 | 0 | ||||
| Total | 4 | 12.5 ± 1.2 | 0 | 0 | 0 | 2 (2) | 12.5 ± 0.50 | |||
| All ethnic groups combined | ||||||||||
| Female | 31 | 12.7 ± 1.7 | 34 | 12.3 ± 1.6 | 15 (13) | 12.9 ± 1.1 | 6 (6) | 14.0 ± 1.3 | 10 (10) | 14.0 ± 1.2 |
| Male | 32 | 12.7±.90 | 37 | 12.7 ± 1.6 | 8 (7) | 13.6±.87 | 2 (2) | 14.5 ± 2.5 | 6 (6) | 14.3 ± 1.8 |
| Total | 63 | 12.7 ± 1.3 | 71 | 12.5 ± 1.6 | 23 | 13.1 ± 1.0 | 8 | 14.1 ± 1.2 | 16 | 14.1 ± 1.3 |
| No. A. actinomycetemcomitans positive (%) | 20 (86.9) | 8 (100) | 16 (100) | |||||||
a
Site refers to a first molar pocket of ≥6 mm with attachment loss of ≥2 mm detected by probing.
b
Bone loss refers to radiographic evidence of vertical bone loss in a first molar interproximal area. A significantly higher number of African-American subjects had bone loss compared to Hispanic subjects (chi-square, P < 0.05).