Stern RS, Epstein AM:  Institutional responses to prospective payment based on diagnoses related groups . N Engl J Med 1985;;312:621-627.
Aday LA, Anderson RM:  The national profile of access to medical care: Where do we stand? Am J Public Health 1984;;74:1331-1339.
Davis K, Gold M, Makuc D:  Access to health care for the poor: Does the gap remain? Annu Rev Public Health 1981;;2:159-182.
Diehr P, Martin DP, Price KF, et al:  Use of ambulatory care services in three provider plans . Am J Public Health 1984;;74:47-51.
James SA, Wagner EH, Strogatz DS, et al:  The Edgecombe County (NC) High Blood Pressure Control Program . Am J Public Health 1984;;74:468-472.
Yergan J, Flood AB, LoGerfo JP, et al:  Relationship between patient race and the intensity of hospital services . Med Care 1987;;25:592-603.
Wilson PA, Griffith JR, Tedeschi PJ:  Does race affect hospital use? Am J Public Health 1985;;75: 263-269.
Bombardier C, Fuchs VR, Lillard LE, et al:  Socioeconomic factors affecting the utilization of surgical operations . N Engl J Med 1977;;297:699-705.
Gillum RF: Â Coronary artery bypass surgery and coronary angiography in the United States, 1979-1983Â . Am Heart J 1987;;113:1255-1260.
Ford E, Cooper R, Castaner A, et al:  Coronary arteriography and coronary bypass surgery among whites and non-whites relative to hospital-based incidence rates for coronary artery disease . Am J Public Health , in press.
Oberman A, Cutter G:  Issues in the natural history and treatment of coronary heart disease in black populations: Surgical treatment . Am Heart J 1984;;108:688-694.
CASS (Principal Investigators and Associates):  Myocardial infarction and mortality in the Coronary Artery Surgery Study (CASS): Randomized trial . N Engl J Med 1984;;310:750-758.
European Coronary Surgery Study Group:  Long-term results of prospective randomized study of coronary artery bypass surgery in stable angina pectoris . Lancet 1982;;2:1173-1180.
Peduzzi P, Hullgren HN:  Effect of medical vs surgical treatment of symptoms in stable angina pectoris: The Veterans Administration Cooperative Study of Surgery for Coronary Arterial Occlusive Disease . Circulation 1979;;60:888-900.
Detailed Diagnosis and Procedures for Patients Discharged from Short-term Hospitals, US 1985 , US Dept of Health and Human Services publication (PHS) 87-1751. National Center for Health Statistics, 1985;.
Maynard C, Fisher LD, Passamani ER, et al:  Blacks in the Coronary Artery Surgery Study . Circulation 1986;;74:64-71.
Colton T: Statistics in Medicine . Boston, Little Brown & Co Inc, 1974;.
Robins J, Greenland S, Breslow NE:  A general estimator for the variance of the Mantel-Haenszel odds ratio . Am J Epidemiol 1986;;124:719-723.
SUGI Supplemental Library User's Guide, version 5. Cary, NC, SAS Institute, 1986.
General Population Characteristics Massachusetts , US Dept of Commerce publication PC80-1-B23. Bureau of the Census, 1982;.
Cassel J, Heyden S, Bartel AG, et al:  Incidence of coronary heart disease by ethnic group, social class and sex . Arch Intern Med 1971;;128:901-906.
Gillum RF:  Coronary heart disease in black populations: I. Mortality and morbidity . Am Heart J 1982;;104:839-851.
Curry CL, Oliver J, Mumtaz FB:  Coronary artery disease in blacks: Risk factors . Am Heart J 1984;:108:653-657.
Gillum RF, Grant CT:  Coronary heart disease in black populations: II. Risk factors . Am Heart J 1982;;104:852-864.
Hagstrom RM, Federspiel CF, Ho YC:  Incidence of myocardial infarction and sudden death from coronary heart disease in Nashville, Tennesee . Circulation 1971;;44:884-890.
Keil JE, Saunders DE, Lackland DT, et al:  Acute myocardial infarction: Period prevalence, case fatality, and comparison of black and white cases in urban and rural areas of South Carolina . Am Heart J 1985;;109:776-784.
Weisse AB, Abiuso PD, Thind IS:  Acute myocardial infarction in Newark, NJ: A study of racial incidence . Arch Intern Med 1977;;137:1402-1405.
Sempos C, Cooper R, Kovar MG, et al:  Divergence of the recent trends in coronary mortality for the four major race-sex groups in the United States . Am J Public Health 1988;;78:1422-1427.
Dutton D:  Explaining the low use of health services by the poor . Am Soc Rev 1978;;43:348-368.
Hayward RA, Shapiro MF, Freeman HE, et al:  Inequities in health services among insured Americans . N Engl J Med 1988;;318:1507-1512.
Greenberg ER, Chute CG, Stukel T, et al:  Social and economic factors in the choice of lung cancer treatment . N Engl J Med 1988;;318:612-617.
Wennberg J, Gittelsohn A:  Small-area variations in health care delivery . Science 1982;;246:120-135.
Chassin MR, Brook RH, Park RE:  Variations in the use of medical and surgical services by the Medicare population . N Engl J Med 1986;;314:285-290.
Brook RH, Kosecoff JB, Park RE, et al: Â Diagnosis and treatment of coronary disease: Comparison of doctor's attitudes in the USA and UKÂ . Lancet 1988;;1:750-753.
Eisenberg JM:  Sociologic influences on medical decision making by clinicians . Ann Intern Med 1979;;90:957-964.
Egbert LD, Rothman IL:  Relation between race and economic status of patients and who performs their surgery . N Engl J Med 1977;;297:90-91.
Demlo LK, Campbell PM:  Improving hospital discharge data . Med Care 1981;;19:1030-1040.
Hsia DC, Krushat M, Fagan AB, et al:  Accuracy of diagnostic coding for Medicare patients under the prospective-payment system . N Engl J Med 1988;;318:352-355.
Iezzoni LI, Burnside S, Sickles L, et al:  Coding of acute myocardial infarction: Clinical and policy implications . Ann Intern Med 1988;;109:745-751.
Sloan FS, Valvona J, Mullner R:  Identifying the issues: A statistical profile , in Sloan F, Blumenstein J, Perrin J (eds): Uncompensated Hospital Care: Rights and Responsibilities . Baltimore, Johns Hopkins University Press, 1986;, pp 16-53.
Roos NP, Wennberg JE, McPherson K:  Using diagnosis-related groups for studying variations in hospital admissions . Health Care Financ Rev ,
(Summer)
1988;, p 53.