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

Table 4 Prevalence of comorbidities by claims data source in the final algorithm^a for 11,973 women

Claim source	Diabetes, n (%)	Hypertension, n (%)	Deficiency anemia, n (%)	Smoking, n (%)	Obesity, n (%)
Inpatient facility	366 (3.06)	1,382 (11.54)	215 (1.80)	746 (6.23)	314 (2.62)
Provider or outpatient facility	637 (5.32)	2,147 (17.93)	642 (5.36)	1,017 (8.49)	540 (4.51)
Prescription drug	641 (5.35)	2,577 (21.52) ^b	n/a	61 (0.51)	n/a
Inpatient facility, provider, or outpatient facility (algorithm 3)	718 (6.00)	2,603 (21.74)	796 (6.65)	1,515 (12.65)	756 (6.31)
Inpatient facility, provider, outpatient facility, or prescription drug (algorithm 4)	813 (6.79)	2,978 (24.87) ^b	n/a	1,541 (12.87)	n/a

n/a not applicable
^a Final algorithm was algorithm 3 for deficiency anemia and obesity and algorithm 4 for diabetes, hypertension, and smoking; see Table 1 for description of each algorithm
^b By definition all with Rx had at least one facility or provider medical claim

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