Table 2.

Demographics of the healthy and diseased groups

Periodontal statusMean age (yr) ± SDNo. (%) of subjectsSample size (no.)
FemaleMaleWhiteAfrican-AmericanAsian-AmericanOther
Diseased51.4 ± 12.851 (39)79 (61)87 (67)32 (25)5 (4)6 (5)130
Healthy49.2 ± 15.2112 (62)69 (38)149 (82)26 (14)5 (3)1 (1)181
Total16314823658107311