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Table 1 Summary of the study populations

From: Genome wide association scan for chronic periodontitis implicates novel locus

Variable

 

Pittsburgh

Porto Alegre

Rio de Janeiro

 

N

866

1,460

359

Periodontitis status

Affected

99 (11.4%)

430 (29.4%)

183 (51%)

 

Non-Affected

767 (88.6%)

1,030 (70.6%)

176 (49%)

Mean age (Years)

 

41

40

56

Sex

Females

439 (50.7%)

784 (53.7%)

257 (71.6%)

 

Males

427 (49.3%)

676 (46.3%)

105 (28.4%)

Ethnic background

White

606 (70%)

1,188 (81.4%)

288 (80.2%)

 

Black

190 (21.9%)

272 (18.6%)

71 (19.8%)

 

Other

70 (8.1%)

0

0

Ethnic background

White

63

348

147

In individuals with

Black

32

82

36

With Periodontitis

Other

4

0

0

Smoker

 

128 (14.8%)

430 (29.4%)

39 (10.9%)

Self-reported diabetes

 

44 (5.1%)

40 (2.7%)

31 (8.6%)