Table 2.

Concordance values between diagnostic tests

	Kappa index (95% CI)
	Culture	K39	Minicircle PCR	Maxicircle PCR
Smear	0.38 (−0.17, 0.93)	0.42 (0.02, 0.82)	0.13 (−0.04, 0.30)	0.42 (0.02, 0.82)
Culture	–	0.58 (0.21, 0.94)	0.13 (−0.04, 0.30)	0.48 (0.05, 0.90)
K39	–	−	0.24 (0.00, 0.49)	0.84 (0.62, 1.00)
Minicircle PCR	–	−	–	0.27 (0.04, 0.51)

CI = confidence interval; PCR = polymerase chain reaction.

Force of concordance: poor < 0.20, weak 0.21–0.40, moderate 0.41–0.60, good 0.61–0.80, very good 0.81–1.00.