Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Characteristics of the study groups
| Clinical forms | Severe periodontitis | Moderate periodontitis | Healthy controls |
|---|---|---|---|
| Number of individuals (n) | 67 | 88 | 54 |
| Gender | |||
| Male (%) | 27 (40·3) | 22 (25) | 23 (42·6) |
| Female (%) | 40 (59·7) | 66 (75) | 31 (57·4) |
| Age range (years) | 15–59 | 15–67 | 19–70 |
| Mean ± s.d. (years) | 36·9 ± 12·4 | 40·2 ± 11·6 | 29·4 ± 9·6 |
| Smoking status | |||
| Non-smokers (%) | 47 (70·2) | 59 (67) | 52 (96·3) |
| Smokers (%) | 20 (29·8) | 29 (33) | 2 (3·7) |
