Table 2.

Maximum correlation coefficient of search queries from Google Trends.

Number	Index	Aspects	Laga	Correlation coefficient	P valueb
1	ginger	Treatment	1	–0.33	.02
2	swine fluc symptoms	Disease	1	0.50	<.001
3	Infect	Symptom	1	0.36	.01
4	衛生署 (Department of Health)	Others	1	0.43	.00
5	fever	Symptom	2	0.31	.04
6	豬流感 診所 (swine flu clinic)	Disease	2	0.49	<.001
7	牙醫 (dentist)	Others	2	–0.32	.04
8	肠病毒 (enterovirus)	Disease	6	0.38	<.001
9	cough	Symptom	7	–0.42	<.001

^aThe unit of lag is week(s).

^bThe P value is modified by false discovery rate (significance level=.05).

^cSwine flu is the nickname of H1N1 influenza in Hong Kong.