Table 1.

Model inputs

Input parameter	Possible values
Age	65–69, 70–74, 75–79, 80–84, and ≥85
Body mass index	<25 vs. ≥25
Cigarette use	current user vs. former user or non-smoker
Chronic obstructive pulmonary disease	yes vs. no
Other cancer	yes vs. no
Congestive heart failure	yes vs. no
Diabetes	yes vs. no
Difficulty walking several blocks	yes vs. no
Difficulty managing finances	yes vs. no
Difficulty bathing	yes vs. no
Difficulty pushing/pulling large objects	yes vs. no
Tumor grade	low, intermediate, and high
Tumor size	0–0.5cm, 0.6–1.0cm, 1.1–1.5cm, 1.6–2.0cm, and >2.0cm
Estrogen receptor status	positive vs. negative
Margin	positive, close, and negative
Lymph nodes	0, 1–3, and ≥4
Additional health conditions	neutral, more favorable, and less favorable
Additional breast cancer factors	neutral, more favorable, and less favorable