Table 3.

Clinical and molecular biological examination results for subjects positive or negative for red complex (RC) species or Campylobacter rectus (Cr)

Groups	Clinical parametersa				PCR results
	PD [Mean ± SE (mm)]	PI [Mean ± SE]	GI [Mean ± SE]	BOP -positive (%)	Total number of species [Mean ± SE]
RC (+) (n = 10)	2.70 ± 0.15	1.60 ± 0.40	0.40 ± 0.22	10.0	6.00 ± 0.67d
RC (-) (n = 177)	2.32 ± 0.05	1.62 ± 0.08	0.38 ± 0.05	7.4	0.88 ± 0.11d
Cr (+) (n = 34)	2.56 ± 0.11b	1.91 ± 0.19	0.62 ± 0.13c	14.7	4.18 ± 0.34e
Cr (-) (n = 153)	2.28 ± 0.05b	1.56 ± 0.09	0.33 ± 0.05c	6.0	0.46 ± 0.07e

^aPD; periodontal pocket depth, PI; plaque index, GI; gingival index, BOP; bleeding on probing.

^b-eStatistical differences between two groups revealed by Student's t-test between two groups (^{b, c}P < 0.05 and ^{d, e}P < 0.001).