Table 1.

Summary statistics–patient demographics and health conditions.

Enrollee characteristics	Enrollees affected by PCP exits	Enrollees not affected by PCP exits
Female	0.59	0.58
Age	76.19	75.65
Black	0.08	0.07
Hispanic	0.02	0.02
Asian	0.02	0.02
Other race	0.02	0.02
Part A coverage in months	11.63	11.62
Part B coverage in months	11.64	11.65
Buy-in numberof months	1.51	1.42
HMO coverage in months	0.60	0.38
Part D coverage in months	6.37	6.22
Part D subsidy in months	2.40	2.48
Dual eligibility in months	1.63	1.54
Disabled and/or ESRD status	0.01	0.02
Alzheimer’s and related dementias	0.08	0.08
Anemia	0.24	0.24
Atrial fibrillation	0.09	0.09
Benign prostatic hyperplasia	0.07	0.07
Cataracts	0.23	0.23
Chronic kidney disease	0.14	0.14
COPD	0.11	0.12
Congestive heart failure	0.15	0.16
Depression	0.11	0.11
Diabetes	0.27	0.26
Glaucoma	0.12	0.12
Hyperlipidemia	0.51	0.50
Hypertension	0.63	0.61
Hypothyroidism	0.10	0.10
Ischemic heart disease	0.32	0.32
Osteoporosis	0.08	0.08
Rheumatoid arthritis	0.30	0.29
N = # enrollees × years	1,186,752	27,402,848
# Enrollees	195,023	63,46,211

Notes: This table provides sample means derived from the 20% Medicare Master Beneficiary Summary Files and the 20% Carrier claims from the years 2007 to 2013. Column 1 shows information on patient characteristics, Medicare enrollment information, and chronic conditions for patients affected by PCP exits at some point during the sample period. Column 2 shows the same information for patients who were never affected by PCP exits during the sample period, but who could be attributed to a PCP using the Evaluation and Management codes in the Carrier claims.