Table 1 Characteristics of the studied populations
From: Variation in the CXCR1 gene (IL8RA) is not associated with susceptibility to chronic periodontitis
Control n = 195 | Periodontitis n = 200 | Total n = 395 | p | |
|---|---|---|---|---|
Age, mean (±) | 35.47(± 9.9) | 43.44(± 10.5) | 39.49(± 10.9) | < 0.0001a |
Gender n (%) | ||||
Female | 114 (58%) | 122 (61%) | 236 (59.7%) | 0.74b |
Male | 81 (42%) | 78 (39%) | 159 (40.3%) | |
Smoking habits n (%) | ||||
Nonsmokers | 179 (91%) | 156 (78%) | 335 (84.8%) | < 0.0002b |
Smokers | 16 (9%) | 44 (22%) | 60 (15.2%) |