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. 2014 Dec 16;16(12):e289. doi: 10.2196/jmir.3680

Table 3.

Correlation analysis between the Daum data for combined queries and the KCDC ILI data in development sets 1 and 2.

Order	Combined query	Correlation coefficient			Combined query	Correlation coefficient
Order	Combined query	Development set 1 (2009/10)	Validation set 1 (2010/11)	Validation set 2 (2011/12)	Combined query	Development set 2 (2010/11)	Validation set 2 (2011/12)
1	New flu (abbr.)^a	.894^b	.622^b	^c	Bad cold + Symptom	.969^b	.981^b
2	Flu + Vaccine	.871^b	-.062^d	-.157^e	New flu + Treatment	.951^b	.616^b
3	New flu + Cough	.849^b	.930^b	.291^b	New flu + Cough	.930^b	.291^b
4	New flu + Fever	.814^b	.591^b	.460^b	New flu + Sign	.919^b	.684^b
5	Tamiflu + Vaccine	.805^b	-.062^c	^c	Tamiflu	.904^b	.981^b
6	Tamiflu + Symptom	.800^b	^c	^c	New influenza + Symptom	.896^b	.650^b
7	Flu + Symptom	.799^b	.815^b	.416^b	Bad cold + Treatment	.887^b	.814^b
8	H1N1 + Symptom	.791^b	^c	^c	Swine flu + Symptom	.877^b	.005^e
9	New flu + Sore throat	.738^b	.504^b	^c	New flu + Symptom	.836^b	.936^b
10	New flu (abbr.)^a + Vaccine	.713^b	^c	^c	Flu + Symptom	.815^b	.416^b
11	New flu + Symptom	.709^b	.836^b	.936^b	Influenza + Symptom	.813^b	.782^b
12	Tamiflu	.703^b	.904^b	.981^b	Influenza (English)^g	.762^b	.751^b
13	Tamiflu (English)^g	.700b^b,h	.523^b	.286^b	New influenza	.748^b	.503^b
14					Bird flu + Symptom	.747^b	.005^f
15					Bird flu	.709^b,h	.136ⁱ

^aabbr.: abbreviation

^b P<.05.

^cCorrelation cannot be computed because it has a constant value in that period (see Multimedia Appendix 2).

^d P=.66.

^e P=.27.

^f P=.98.

^gThe query was originally submitted in English.

^hWe selected the combined queries for which the correlation coefficients were ≥.7 and listed them in descending order.

ⁱ P=.34.