Table 2. Results of the single-variable analysis on factors affecting the risk of tick-borne encephalitis, ordered by AIC, EU/EEA, 2000–2021.

Predictors	Best model type	a0	p value (a0 )	a1	p value (a1 )	a2	p value (a2 )	R2 m	R2 c	AIC
T_winter	Q	0.27	0.34	−0.23	< 0.001	−0.01	< 0.001	0.23	0.61	995.29
Elev	Q	0.36	0.40	2.31	< 0.001	−1.18	< 0.001	0.09	0.75	1,001.24
SD	L	0.14	0.63	−.77	< 0.001	Not applicable		0.18	0.61	1,004·07
BIO11	Q	0.28	0.32	−0.24	< 0.001	−0.02	< 0.001	0.18	0.58	1,010.20
BIO6	Q	0.30	0.31	−0.17	< 0.001	−0.01	< 0.001	0.13	0.59	1,015.75
BIO10	Q	0.44	0.17	−0.21	< 0.001	−0.03	< 0.001	0.13	0.59	1,018.76
CLC_31	L	−0.66	0.10	2.43	< 0.001	Not applicable		0.07	0.65	1,029.83
BIO17	Q	0.34	0.41	0.01	< 0.001	0.00003	0.01	0.05	0.69	1,031.70
RH	Q	0.51	0.14	0.14	< 0.001	−0.04	< 0.001	0.09	0.61	1,036.87
BIO12	Q	0.31	0.47	0.002	< 0.001	−0.000001	0.04	0.04	0.71	1,037.94
CLC_1	L	0.43	0.25	−2.15	< 0.001	Not applicable		0.04	0.64	1,039.15
BIO18	Q	0.27	0.49	0.01	< 0.001	−0.000001	0.001	0.04	0.68	1,040.89
BIO1	Q	0.32	0.33	−0.13	< 0.001	−0.008	< 0.001	0.07	0.58	1,046.00
BIO16	L	0.23	0.60	0.004	< 0.001	Not applicable		0.03	0.70	1,047.13
BIO19	L	0.32	0.43	0.005	< 0.001	Not applicable		0.03	0.68	1,050.77
host_cervids	Q	−2.70	< 0.001	11.72	< 0.001	−10.68	< 0.001	0.04	0.67	1,055.19
BIO9	Q	0.24	0.51	−0.04	< 0.001	−0.003	0.04	0.03	0.60	1,058.42
ac_rate	Q	−12.88	0.001	−153.39	< 0.001	-440.51	< 0.001	0.03	0.63	1,061.64
sw_rate	L	−1.86	0.01	10.41	< 0.001	Not applicable		0.03	0.59	1,061.94
host_af	L	−0.79	0.09	1.76	< 0.001	Not applicable		0.04	0.62	1,062.34
BIO3	Q	−0.001	0.99	−0.08	0.04	0.04	< 0.001	0.03	0.61	1,064.14
CLC_2	Q	−0.35	0.43	3.70	0.001	−4.35	< 0.001	0.01	0.62	1,064.42
host_mg	Q	−2.31	0.02	8.95	0.003	−7.40	0.001	0.02	0.62	1,065.69
BIO15	L	0.21	0.56	−0.02	0.004	Not applicable		0.01	0.60	1,066.50
CLC_32	L	0.02	0.95	4.36	0.01	Not applicable		0.01	0.63	1,067.48
EVI	L	−1.12	0.09	4.19	0.01	Not applicable		0.01	0.63	1,068.05
BIO4	L	0.18	0.60	0.8	0.02	Not applicable		0.02	0.59	1,068.84
BIO2	L	0.21	0.56	−0.13	0.02	Not applicable		0.01	0.61	1,069.33
SnowIce	L	0.19	0.61	55.52	0.03	Not applicable		0.01	0.63	1,069.93
BIO8	L	0.27	0.46	−0.03	0.03	Not applicable		0.01	0.61	1,070.12
For_length	L	0.21	0.57	0.0002	0.56	Not applicable		0.01	0.61	1,074.28

a₀ : intercept; a₁ : coefficient of linear term; a₂ : coefficient of quadratic term; AIC: Akaike information criterion; CLC: Corine land cover; EU/EEA: European Union and European Economic Area; L: linear model; Q: quadratic model; R²m: marginal R²; R²c: conditional R².

Significant coefficients are presented in bold. See Table 1 for a description of the predictors.