Table 2.

Correlation and lagged transformed correlation of alternative predictors with notified case counts of campylobacteriosis.

Data source	Number of days that alternative measures are lagged before notifiable counts
	0 days	−1 day	−2 days	−3 days	−4 days	−5 days	−6 days	−7 days	−8 days	−9 days	−10 days
GPa consultations	0.5b	0.43b	0.39b	0.26b	0.17b	0.14b	0.09	0.05	0.04	0.01	0.01
Consumer helpline	0.44b	0.59b	0.67b	0.64b	0.55b	0.37b	0.2b	0.12b	0.1	0.07	0.07
Google Trends	0.13b	0.16b	0.22b	0.22b	0.21b	0.17b	0.21b	0.21b	0.16b	0.08	0.02
Twitter microblogs	0.11b	0.21b	0.31b	0.25b	0.21b	0.07	0	−0.01	0	−0.03	0
School absenteeism	0.3b	0.48b	0.64b	0.7b	0.52b	0.35b	0.21b	0.2b	0.17b	0.18b	0.15b

^aGP: general practice.

^bStatistically significant correlation coefficient >0.1.