. Author manuscript; available in PMC: 2016 Jan 1.

Published in final edited form as: J Am Geriatr Soc. 2014 Dec 23;63(1):1–7. doi: 10.1111/jgs.13184

Table 3.

Yearly Probabilities of Unneeded Diagnostic Imaging, Benign Biopsy and Breast Cancer Diagnosis for a Woman with no Comorbidities by Screening and Age Group.

		Age Group
		70–74	75–80	80–84	≥ 85
	Screened	P^a	P	P	P
Diagnostic imaging in the absence of cancer	No	0.073	0.047	0.035	0.018
	Yes	0.075	0.074	0.069	0.061
Benign biopsy	No	0.009	0.007	0.006	0.004
	Yes	0.014	0.013	0.012	0.010
In situ cancer	No	0.0006	0.0006	0.0004	0.0004
	Yes	0.0011	0.0012	0.0016	0.0022
Invasive cancer	No	0.0027	0.0030	0.0034	0.0033
	Yes	0.0043	0.0053	0.0044	0.0059

Yearly probability estimated from logistic regression of person-year data, with indicator variables for the 8 combinations of screening and age categories. Comorbidity score was included as a continuous covariate.