Table 3.

Agreement table matrix.

		Epidemiological investigation
		Primary	Secondary	Total	Agreement
Nearest-neighbor kernel	Primary	89	9	98	Substantial agreement (89.9%), Cohen's k: 0.76 (95% CI =0.68–0.84)
	Secondary	22	154	176
Uniform kernel	Primary	55	5	60	Moderate agreement (77.8%), Cohen's k: 0.50 (95% CI =0.39–0.61)
	Secondary	56	158	214
	Total	111	163	274

Agreement values are presented as overall agreement frequency, Cohen's kappa coefficients and 95% confidence intervals (95% CI).