Table 1

TABLE 1. Results of regression analysis, which well represent the consistent findings in different multiple regressions of this study. In this regression, the number of days during the winter (t -1) with minimum temperatures between -12º and -7ºC is shown to be significant. The b value is negative for this variable, indicating a relation between a mild winter in (t -1) and an increase in TBE incidence in the year t. The number of days with temperatures below -12ºC was closely correlated with the number of days with temperatures between -12º and -7ºC. For both year t and (t -1), the best correlations with TBE incidence were obtained with 5º -10ºC as the critical interval.

Regression		Parameter estimates
r²	P	Variable	B coefficient	T ^*	P
0.48	0.0003	spring/fall season in year t:
		Between +5ºC and +10ºC	0.24	2.4	0.02
		Above +10ºC	0.25	1.9	0.07
		winter and spring/fall season in year (t -1):
		Between -12ºC and -7ºC	-0.25	-2.7	0.01
		Above +5ºC and +10ºC	0.25	3.4	0.002

^*T = B/Standard error of B; abbreviations used in SPSS for Windows