Table 1.

Patient Characteristics: DRG Diagnoses, Case Mix, and Demographics

	Nonhospitalists	Hospitalists	Generalists	Rheumatologists	Endocrinologists	Nephrologists
Number of patients	1,639	913	1,397	640	132	218
Distribution of 10 most common DRG diagnoses, n (%)
Pneumonia (DRG 89)	83 (5.1)	51 (5.6)	74 (5.3)	32 (4.9)	7 (5.0)	11 (4.9)
Kidney and urinary tract  Diagnoses (DRG 331)	68 (4.1)	45 (4.9)	73 (5.1)	24 (3.7)	6 (4.3)	10 (4.5)
Renal failure (DRG 316)	66 (4.0)	26 (2.8)	48 (3.4)	26 (4.0)	4 (2.9)	7 (3.1)
Kidney/urinary tract Infections (DRG 320)	61 (3.7)	30 (3.3)	54 (3.9)	21 (3.2)	5 (3.6)	7 (3.1)
Nutritional/metabolic disorders (DRG 296)	65 (4.0)	24 (2.6)	47 (3.4)	28 (4.3)	2 (1.4)	9 (4.0)
Gastroenteritis and digestive system diagnoses (DRG 182)	64 (3.9)	22 (2.4)*	40 (2.9)	16 (2.5)	5 (3.6)	16 (7.1)†‡
Connective tissue disease (DRG 240)	53 (3.2)	25 (2.7)	36 (2.6)	25 (3.8)	4 (2.9)	6 (2.7)
Other circulatory system diagnoses (DRG 144)	47 (2.9)	26 (2.8)	46 (3.3)	14 (2.2)	5 (3.6)	5 (2.2)
Cellulitis (DRG 277)	45 (2.8)	28 (3.1)	40 (2.9)	20 (3.1)	4 (2.9)	2 (0.9)
Heart failure (DRG 127)	36 (2.2)	26 (2.8)	39 (2.8)	14 (2.1)	4 (2.9)	4 (1.8)
Case mix index	1.21	1.20	1.19	1.21	1.23	1.23
Mean age, y	57.0	57.0	56.9	57.3	58.5	55.7
Male, %	40.9	44	43.1	37.4†	48.5	48.0
Race, %
Asian	1.3	1.2	1.4	1.2	0.7	0.9
Black	16.4	14.7	14.3	17.1	24.3†‡	16.6
Hispanic	0.8	1.1	1.1	1.1	1.5	0.5
White	78.9	80.2	80.4	78.4	71.3†‡	81.2
Insurance, %
Medicare	48.1	48.5	48.0	46.6	50.7	46.1
Medicaid	10.0	8.1	8.7	10.5	8.1	11.4
Managed care/HMO	16.7	16.0	16.5	17.2	14.0	16.9
Other	24.5	26.4	25.0	26.1	24.2	25.1

^*P < .05 for comparison to nonhospitalists.

^†P < .01 for comparison to hospitalists.

^‡P ≤ .01 for comparison to generalists.