Table 1.

Correlation coefficients and mean absolute differences between model-based state estimates and NCHS urban-rural area estimates, and BRFSS direct state estimates, by test type.

	Up-to-date with mammographya			Rarely or never had a mammogramb
Test	Test estimate	Mean (%)	Median (%)	Test estimate	Mean (%)	Median (%)
Spearman correlation coefficient	State estimates (n=51)
Model-Based	0.98	77.66	78.44	0.95	11.56	11.27
BRFSS		77.58	78.10		11.60	11.17
Mean absolute differences	0.79			0.95
Spearman correlation coefficient	NCHS urban-rural stimatesc (n=6)
Model-Based	0.94	77.72	77.72	0.94	11.68	11.73
BRFSS		77.43	78.09		11.91	11.70
Mean absolute differences	1.03			0.92

Notes: NCHS=National Center for Health Statistics

^aUp-to-date = having had the most recent mammogram within 2 years;

^bRarely or never = having had the most recent mammogram ≥5 years before the survey interview or never.

^cMetropolitan and nonmetropolitan areas were based on the 2013 6 categories of NCHS urban-rural classification Scheme for counties.

BRFSS percentages are weighted to the study population