Table 1.

Comparison between Connecticut sites and Block Island sites of the density of Ixodes scapularis nymphs (DON), density of nymphs (DIN) and nymphal infection prevalence (NIP) using poisson and logistic models.

	Estimate	Std error	z value	P
Poisson - DONa
Intercept	-3.46	0.08	-43.94	< 0.001
Region	0.733	0.1	7.16	< 0.001
Year	-0.12	0.12	-1.01	0.31
Region * Year	0.28	0.15	1.92	0.06
offset = log(transect area)d
Poisson - DINb
Intercept	-4.81	0.13	-37.65	< 0.001
Region	0.85	0.14	6.22	< 0.001
Year	0.09	0.13	0.71	0.48
offset = log(transect area)d
Logistic - NIPc
Intercept	-1.24	0.19	-6.58	< 0.001
Region	0.04	0.22	0.17	0.87
Year	0.67	0.27	2.52	0.01
Region * Year	-0.7	0.32	-2.23	0.03

^aDensity of nymphs,

^bDensity of infected nymphs,

^cNymphal infection prevalence,

^dIn the Poisson models transect area is an offset or exposure variable to adjust for sampling effort