Table 3.

Pearson correlation coefficients between the Taiwan Center for Disease Control National influenza-like illness data and each surveillance variable from the electronic medical records of Taipei Medical University Health Care System (October 2014 to September 2017).

Time period	Regional ILIa	TMUHcSb-ILI	TMUHcS-RITPc	TMUHcS-IMUd
National ILI of the entire period (October 2014 to September 2017)	.99	.88	.90	.93
National ILI of period 1 (October 2014 to September 2015)	.99	.98	.87	.96
National ILI of period 2 (October 2015 to September 2016)	.99	.94	.95	.97
National ILI of period 3 (October 2016 to September 2017)	.99	.97	.88	.96

^aILI: influenza-like illness.

^bTMUHcS: Taipei Medical University Health Care System.

^cRITP: rapid influenza laboratory tests with positive results.

^dIMU: influenza medication use.