Table 3.

Census Tract Variables Associated With Odds of Not Completing Preventive Services Using Logistic Regression With Generalized Estimating Equations to Account for Clustering at the Census Tract Level.

Census Tract Variable	Odds Ratio	95% Confidence Interval	Adjusted Odds Ratioa	95% Confidence Interval
Census tract povertyb
Quartile 1 (lowest poverty)	Ref	Ref	Ref	Ref
Quartile 2	1.16	0.97-1.39	1.13	0.94-1.35
Quartile 3	1.26	1.06-1.49	1.22	1.01-1.48
Quartile 4 (highest poverty)	1.27	1.06-1.54	1.25	1.01-1.54
Census tract vehicle accessc
Quartile 1 (most households with vehicle)	Ref	Ref	Ref	Ref
Quartile 2	1.26	1.06-1.49	1.22	1.02-1.46
Quartile 3	1.37	1.19-1.59	1.33	1.12-1.59
Quartile 4 (least households with vehicle)	1.36	1.12-1.64	1.32	1.07-1.63
Census tract educational attainmentd
Quartile 1 (highest attainment)	Ref	Ref	Ref	Ref
Quartile 2	0.99	0.82-1.21	0.96	0.79-1.17
Quartile 3	1.20	1.01-1.43	1.18	0.98-1.41
Quartile 4 (lowest attainment)	1.18	0.96-1.44	1.12	0.90-1.39

^aAdjusted for race, ethnicity, insurance, sex, and primary care center.

^bCensus tract poverty quartiles defined as percentage below poverty line: (1) <13.7%, (2) 13.7% to 24.9%, (3) 24.9% to 42.0%, and (4) >42%.

^cCensus tract vehicle access quartiles defined as percentage of households with no vehicle: (1) <6.9%, (2) 6.9% to 16.7%, (3) 16.7% to 30.7%, (4) >30.7%.

^dCensus tract educational attainment quartiles defined as percentage of adults with less than a high school education: (1) <10.8%, (2) 10.8% to 16.7%, (3) 16.7% to 24.8%, and (4) >24.8%.