The subgingival cultivable bacteria of Albanian subjects with different periodontal status compared to a similar population of Spanish subjects: a case control study

Table 8 Comparison of total anaerobic counts and proportions of selected species by adjusting for confounding factors

		Country	n	Mean^a (SD)	p value^b	Adjusted mean^c (95% CI)	Adjusted p value^d
Total anaerobic counts	Health/gingivitis	Spain	30	5.77 (0.60)	0.001	5.62 (5.42–5.82)	0.000
		Albania	25	6.29 (0.43)		6.46 (6.24–6.69)

Proportions				Mean (SD)	p value^e	Adjusted mean^f (95% CI)	Adjusted p value^d
F. nucleatum	Health/gingivitis	Spain	30	4.55 (5.57)	0.022	0.40 (0.20–0.60)	0.040
		Albania	25	1.65 (2.00)		0.05 (-0,17–0.27)
	Periodontitis I–II	Spain	30	2.93 (3.35)	0.034	0.25 (0.05–0.46)	0.004
		Albania	28	1.17 (1.46)		-0.18 (-0.39–0.02)
P. intermedia	Periodontitis III–IV	Spain	30	6.79 (12.08)	0.038	0.34 (0.44–0.63)	0.078
		Albania	30	2.79 (7.48)		-0.06 (-0.03–0.22)

n, sample size; SD, standard deviation; CI, confidence interval
^aMean of log-transformed counts
^bStudent t test
^cAdjusted mean of log-trasnformed counts
^dANCOVA
^eMann–Whitney test
^fAdjusted mean of log-transformed proportions; ANCOVA model: (a) plaque index and probing depth were entered in the model as co-variates; and (b) to achieve the homogeneity of variances, the proportions of F. nucleatum and P. intermedia were log-transformed

ISSN: 1472-6831