Table 2.

Percentage (n) and mean number (95% CI) of periodontal parameters corresponding to CPI scores; 0, 1, 2 and 3

Age	Number of sextants CPI = 0	CPI = 0	Number of sextants CPI = 1 or higher	CPI = 1	Number of sextants CPI = 2 or higher	CPI = 2	CPI = 3
	Mean (95% CI)	% (n)	Mean (95% CI)	% (n)	Mean (95% CI)	% (n)	% (n)
15–20	5.0 (4.8–5.1)	48.0 (85)	1.0 (0.8–1.1)	6.8 (12)	0.8 (0.6–0.9)	44.6 (79)	0.6 (1)
21–30	4.6 (4.4–4.7)	31.6 (117)	1.3 (1.2–1.5)	3.0 (11)	1.2 (1.2–1.4)	65.1 (241)	0.3 (1)
31–45	3.9 (3.7–4.2)	17.0 (25)	1.9 (1.7–2.2)	0.0 (0)	1.8 (1.5–2.1)	81.6 (120)	1.4 (2)
Total	4.5 (4.4–4.6)**	32.7 (227)	1.4 (1.2–1.5)**	3.3 (23)	1.2 (1.2–1.3)**	63.4 (440)	0.6 (4)

** p < 0.001, *p < 0.05