. 2020 Sep 29;22(9):e19788. doi: 10.2196/19788

Table 3.

Time-lag correlation coefficients between new COVID-19 cases and NAVER relative search volumes related to the coronavirus and coronavirus test in South Korea.

Day			Coronavirus searches (type of device)						Coronavirus test searches (type of device)
			Overall		Mobile		Desktop		Overall		Mobile		Desktop
–3 days
	r	0.729 ^a,b		0.761 ^a		0.546^a		0.770		0.756		0.677
	P value	<.001		<.001		<.001		<.001		<.001		<.001
–2 days
	r	0.694		0.726		0.534		0.797		0.787		0.657
	P value	<.001		<.001		<.001		<.001		<.001		<.001
–1 day
	r	0.681		0.720		0.497		0.824		0.799		0.717 ^a
	P value	<.001		<.001		<.001		<.001		<.001		<.001
0 days
	r	0.663		0.704		0.461		0.812		0.804 ^a		0.638
	P value	<.001		<.001		<.001		<.001		<.001		<.001
1 day
	r	0.661		0.692		0.475		0.828 ^a		0.804		0.705
	P value	<.001		<.001		<.001		<.001		<.001		<.001
2 days
	r	0.606		0.650		0.417		0.805		0.788		0.654
	P value	<.001		<.001		<.001		<.001		<.001		<.001
3 days
	r	0.597		0.633		0.423		0.781		0.761		0.626
	P value	<.001		<.001		<.001		<.001		<.001		<.001

^aStrongest correlation for each column.

^bItalics represent a strong correlation with r>0.7.