Table 4. A. actinomycetemcomitans and P. gingivalis bacterial levels and antibodies against them.

				Stroke
Sample	Species			Controls	Cases	P1
Serum	P. gingivalis	Multiserotype	IgA	0.53 (0.44–0.64)	0.54 (0.45–0.64)	0.894
			IgG	21.09 (14.8–30.0)	16.14 (12.6–20.7)	0.227
	A. actinomycetemcomitans	Multiserotype	IgA	1.02 (0.89–1.17)	1.05 (0.89–1.24)	0.780
			IgG	1.12 (1.00–1.26)	1.07 (0.95–1.20)	0.582
		Serotype A	IgA	0.73 (0.63–0.85)	0.86 (0.76–0.98)	0.110
			IgG	0.48 (0.41–0.56)	0.53 (0.48–0.58)	0.338
		Serotype B	IgA	0.48 (0.41–0.55)	0.55 (0.48–0.65)	0.169
			IgG	0.22 (0.19–0.25)	0.22 (0.19–0.25)	0.976
		Serotype C	IgA	0.51 (0.45–0.58)	0.65 (0.57–0.75)	0.008
			IgG	0.34 (0.30–0.39)	0.36 (0.32–0.40)	0.521
		Serotype D	IgA	0.91 (0.81–1.03)	0.92 (0.79–1.07)	0.923
			IgG	0.77 (0.68–0.87)	0.70 (0.63–0.79)	0.300
		Serotype E	IgA	0.60 (0.52–0.68)	0.58 (0.50–0.68)	0.836
			IgG	0.45 (0.39–0.51)	0.42 (0.38–0.47)	0.515
		Serotype X	IgA	0.36 (0.30–0.43)	0.34 (0.27–0.41)	0.596
			IgG	0.33 (0.29–0.38)	0.29 (0.25–0.32)	0.114
Saliva	P. gingivalis	Multiserotype	IgA	0.65 (0.58–0.74)	0.53 (0.47–0.61)	0.030
			IgG	0.09 (0.07–0.13)	0.05 (0.03–0.07)	0.018
	A. actinomycetemcomitans	Multiserotype	IgA	0.88 (0.78–0.99)	0.93 (0.82–1.06)	0.545
			IgG	0.15 (0.12–0.20)	0.12 (0.10–0.16)	0.309
	P. gingivalis	qPCR (genomes/ml)		1.22 (0.41–3.64)	2.55 (0.86–7.56)	0.326
	A. actinomycetemcomitans			4.39 (2.35–8.19)	10.72 (5.45–21.1)	0.023

Presented as mean (95% confidence interval) of log-transformed values. All antibody levels are expressed as ELISA units.

¹ P-values from the t-test, except Mann-Whitney test for saliva qPCR result.