Table 2.

Correlation coefficients for imported infectious diseases and time, number of inbound and outbound travelers, South Korea 2003–2012.

Imported diseases*	Yearly secular trend		Monthly seasonal trend		Inbound travelers		Outbound travelers
	r	P	rho	P	r	P	r	P
Salmonellosis	0.272	0.003	−0.269	0.003	0.242	0.008	0.226	0.013
Shigellosis	0.387	<0.001	0.164	0.073	0.328	<0.001	0.515	<0.001
Malaria	−0.012	0.898	−0.052	0.576	0.119	0.195	0.104	0.258
Dengue	0.482	<0.001	0.163	0.075	0.562	<0.001	0.604	<0.001
Total	0.501	<0.001	−0.121	0.188	0.54	<0.001	0.638	<0.001

^∗Pearson correlation was used for yearly secular trend, inbound travelers, and outbound travelers; Spearman rank correlation was used for monthly seasonal trend.