Table 2. Relationship between mean annual air temperature and mean altitude of tick-borne encephalitis cases, Slovakia, 1980–2004*.

Temperature lag, y	Correlation coefficient	p value
Mean (1–3)	0.689†	0.000
0	0.30‡	0.032
–1	0.466‡	0.019
–2	0.433‡	0.031
–3	0.438‡	0.028

*Nonparametric testing (Spearman rank correlation test).
†Correlation is significant at p<0.01 (2-tailed).
‡Correlation is significant at p<0.05 (2-tailed).