Table 2.

Incidence rate ratios of being a current non-driver, NHATS, 2011–2014^a

	Unadjusted	Adjustedb
Time point	Incidence rate ratioc (95% CI)	Incidence rate ratioc (95% CI)
2011	4.01 (3.44–4.67)	2.19 (1.87–2.56)
2012	3.76 (3.27–4.31)	2.05 (1.78–2.36)
2013	3.52 (3.09–4.01)	1.92 (1.67–2.20)
2014	3.30 (2.90–3.77)	1.80 (1.56–2.07)
Frailty x Time	p = 0.001	p = 0.001

^aAnalyses of weighted data from the National Health and Aging Trends Study. Each column represents one model

^bMultivariable Poisson Regression GEE model adjusted for gender, age, race, living arrangement, dementia, and comorbidity accounting for clustering

^cThe first row (2011) cross-sectional values are prevalence ratio estimates