. Author manuscript; available in PMC: 2022 Aug 12.

Published in final edited form as: Ticks Tick Borne Dis. 2017 Nov 22;9(2):340–348. doi: 10.1016/j.ttbdis.2017.11.010

Table 4.

Association between environmental predictors and the density of I. scapularis nymphs on residential properties in a multivariate Poisson model^a.

Environmental variable	Unit of increase	RR^b	95% CI	p-value

Percent forest on property	10%	1.5	(1.3, 1.7)	< 0.0001^c
Signs of deer on property	Presence	4.2	(2.7, 6.8)	< 0.0001^c
Log pile on property	Presence	12.0	(7.3, 19.7)	< 0.0001^c

Offset variable included for number of drags completed on a residential property in order to account for sampling effort. Log (area of the property in km²) included as a fixed effect to account for differences in property size. Variable to indicate whether a residential property was located near Lake Elmo Park Reserve or William O’Brien State Park was included to account for correlation among households within a neighborhood.

RR = Risk Ratio.

Significant at α = 0.05.