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

Table 5.

Correlation coefficients of combined queries for which the correlation coefficients were ≥.7 and cumulative query methods in set 1.

Cumulative query method from development set 1 (2009/10)	Correlation coefficient		Combined query from development set 1 (2009/10)	Correlation coefficient
Cumulative query method from development set 1 (2009/10)	2009/10	2010/11	Combined query from development set 1 (2009/10)	2009/10	2010/11
1	.894	.622	New flu (abbr.)^a	.894	.622
2	.887	.183	Flu + Vaccine	.871	-.062
3	.883	.916	New flu + Cough	.849	.93
4	.861	.933	New flu + Fever	.814	.591
5	.86	.933	Tamiflu + Vaccine	.805	-.062
6	.859	.933	Tamiflu + Symptom	.8	.^b
7	.849	.943	Flu + Symptom	.799	.815
8	.849	.943	H1N1 + Symptom	.791	.^b
9	.851	.943	New flu + Sore throat	.738	.504
10	.853	.943	New flu (abbr.)^a + Vaccine	.713	.^b
11	.712	.838	New flu + Symptom	.709	.836
12	.728	.841	Tamiflu	.703	.904
13	.728	.841	Tamiflu (English)^c	.7	.523

^aabbr.: abbreviation

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

^cThe query was originally submitted in English.