Table 1. Preperiod Practice Attributes Stratified by OCM Status.

Attribute	Monthly unweighted share per clinician (SD)		Estimate (95% CI)a	P Value
	Non-OCM (n = 3053)	OCM (n = 5062)
Insurance type
Medicare	0.30 (0.20)	0.32 (0.17)	–0.18 (–0.65 to 0.28)	.42
Private	0.36 (0.36)	0.41 (0.16)	–0.11 (–1.64 to 1.42)	.89
Medicaid	0.06 (0.04)	0.06 (0.04)	–1.07 (–5.58 to 3.44)	.63
Medicare Advantage	0.17 (0.10)	0.16 (0.09)	–0.08 (–2.02 to 1.85)	.93
Cancers treated
Breast	0.18 (0.04)	0.20 (0.07)	0.96 (–2.32 to 4.23)	.55
Genitourinary	0.09 (0.04)	0.11 (0.05)	2.11 (–1.78 to 6.01)	.27
Lymphatic	0.11 (0.03)	0.19 (0.16)	1.34 (–0.49 to 3.17)	.14
Lung	0.06 (0.03)	0.08 (0.03)	2.73 (–5.13 to 10.59)	.48
Colon	0.04 (0.02)	0.05 (0.02)	–7.58 (–17.56 to 2.39)	.13
Prostate	0.05 (0.03)	0.04 (0.02)	–3.74 (–11.44 to 3.97)	.33
Respiratory (excluding lung)	0.02 (0.02)	0.03 (0.02)	1.86 (–3.76 to 7.49)	.50
Digestive (excluding colon)	0.03 (0.02)	0.04 (0.02)	11.63 (1.70 to 21.56)	.02
Otherb	0.02 (0.01)	0.02 (0.01)	NA	NA
Patient demographic and care management characteristics
Age, mean (SD), y	65.0 (1.77)	63.4 (3.1)	0.01 (–0.01 to 0.03)	.37
Women	0.61 (0.05)	0.59 (0.07)	0.33 (–2.27 to 2.93)	.80
Receiving chemotherapy	0.53 (0.11)	0.50 (0.15)	–0.25 (–0.90 to 0.40)	.44
Patients, mean (SD), No.	59.3 (49.2)	72.1 (55.0)	0.001 (–0.002 to 0.005)	.36
Medicare patients, mean (SD), No.	21.1 (21.1)	26.0 (23.3)	–0.001 (–0.009 to 0.007)	.82
Physicians, mean (SD), No.	49.7 (29.8)	41.0 (16.8)	–0.004 (–0.016 to 0.009)	.56

Abbreviations: NA, not applicable; OCM, Oncology Care Model.

^a Calculated using non-OCM as the reference. Confidence intervals are calculated using SEs clustered on practice.

^b Includes several other smaller or less relevant disease areas and is not formally evaluated (it is effectively the omitted disease variable).