Modification of claims-based measures improves identification of comorbidities in non-elderly women undergoing mastectomy for breast cancer: a retrospective cohort study

Table 1 Parameters for each algorithm used to identify comorbidities

Algorithm	Comorbidity	Timeframe relative to mastectomy date (in days)	Number of inpatient facility medical claims required	Interval and number of provider or outpatient facility medical claims required	Number of prescription drug (Rx) claims required
Algorithm 1	Diabetes, hypertension, deficiency anemia, smoking, obesity	−365 to −1	1+	2+ more than 30 days apart	n/a
Algorithm 2	Diabetes, hypertension, deficiency anemia, smoking, obesity	−365 to +7	1+	2+ more than 30 days apart	n/a
Algorithm 3	Diabetes, hypertension, deficiency anemia	−365 to +7	1+	2+	n/a
Algorithm 3	Smoking, obesity	−365 to +7	1+	1+	n/a
Algorithm 4	Diabetes	−365 to +7 −365 to −1 Rx	1+	2+	1+
	Hypertension	−365 to +7 −365 to −1 Rx	1+	2+	1+ Rx plus 1 hypertension medical claim
	Smoking	−365 to +7 −365 to −1 Rx	1+	1+	1+

ISSN: 1472-6963