Table 1.

TE-direct qPCR results of Porphyromonas gingivalis compared with (a) lysis-direct qPCR and (b) kit-qPCR

A
Measurement	Lysis-direct qPCR	TE-direct qPCR
Positive rate (%)	63/132 (47.73%)a	60/132 (45.45%)a
Mean log10 copies/ml P. gingivalis (range)b	4.32 (3.01–5.68)c	4.46 (3.27–5.97)c
Ct mean (range)b	28.04 (22.21–33.61)d	27.45 (21.08–33.28)d
Test measurement (95% CI) of TE-direct qPCR to lysis-direct qPCR
Sensitivity		95.24%
Specificity		100%
Agreement		97.73%
κ		0.954

^aχ² = 0.137, P = 0.711.

^bOf PCR-positive samples. Paired t-test.

^cP = 0.200.

^dP = 0.186.

^eχ² = 0.035, P = 0.852.

^fP = 0.206.

^gP = 0.207.