Effectiveness of Adjuvant Fluorouracil in Clinical Practice: A Population-Based Cohort Study of Elderly Patients With Stage III Colon Cancer

A new method of classifying prognostic comorbidity in longitudinal studies: Development and validation

1987 • 44,619 citations

The central role of the propensity score in observational studies for causal effects

1983 • 26,882 citations

Adapting a clinical comorbidity index for use with ICD-9-CM administrative databases

1992 • 10,174 citations

Constructing a Control Group Using Multivariate Matched Sampling Methods That Incorporate the Propensity Score

1985 • 4,508 citations

Matching As An Econometric Evaluation Estimator

1998 • 3,714 citations

Constructing a Control Group Using Multivariate Matched Sampling Methods That Incorporate the Propensity Score

1985 • 3,694 citations

Randomized, Controlled Trials, Observational Studies, and the Hierarchy of Research Designs

2000 • 3,409 citations

Reducing Bias in Observational Studies Using Subclassification on the Propensity Score

1984 • 2,828 citations

The Robust Inference for the Cox Proportional Hazards Model

1989 • 2,407 citations

Causal Effects in Nonexperimental Studies: Reevaluating the Evaluation of Training Programs

1999 • 2,378 citations

A Comparison of Observational Studies and Randomized, Controlled Trials

2000 • 2,320 citations

Levamisole and Fluorouracil for Adjuvant Therapy of Resected Colon Carcinoma

1990 • 2,226 citations

The Effectiveness of Right Heart Catheterization in the Initial Care of Critically III Patients

1996 • 2,204 citations

Underrepresentation of Patients 65 Years of Age or Older in Cancer-Treatment Trials

1999 • 2,152 citations

Adjuvant Therapy for Patients With Colon and Rectal Cancer

1990 • 1,047 citations

A Pooled Analysis of Adjuvant Chemotherapy for Resected Colon Cancer in Elderly Patients

2001 • 954 citations

Fluorouracil plus Levamisole as Effective Adjuvant Therapy after Resection of Stage III Colon Carcinoma: A Final Report

1995 • 907 citations

Potential for Cancer Related Health Services Research Using a Linked Medicare-Tumor Registry Database

1993 • 724 citations

The accuracy of Medicare's hospital claims data: progress has been made, but problems remain.

1992 • 723 citations

Surgical adjuvant therapy of large-bowel carcinoma: an evaluation of levamisole and the combination of levamisole and fluorouracil. The North Central Cancer Treatment Group and the Mayo Clinic.

1989 • 694 citations

The benefit of leucovorin-modulated fluorouracil as postoperative adjuvant therapy for primary colon cancer: results from National Surgical Adjuvant Breast and Bowel Project protocol C-03.

1993 • 683 citations

Controlled trial of fluorouracil and low-dose leucovorin given for 6 months as postoperative adjuvant therapy for colon cancer.

1997 • 582 citations

Early Statin Treatment Following Acute Myocardial Infarction and 1-Year Survival

2001 • 539 citations

The Effect of Marital Status on Stage, Treatment, and Survival of Cancer Patients

1987 • 517 citations

Bias in the Coding of Hospital Discharge Data and Its Implications for Quality Assessment

1994 • 348 citations

Reconciling Conflicting Evidence on the Performance of Propensity-Score Matching Methods

2001 • 334 citations

Colorectal cancer

1999 • 312 citations

Completeness of hospital cancer case reporting from the SEER program of the national cancer institute

1995 • 286 citations

Completeness of hospital cancer case reporting from the SEER program of the national cancer institute

1995 • 282 citations

Right Heart Catheterization and Cardiac Complications in Patients Undergoing Noncardiac Surgery

2001 • 265 citations

An Additional Basic Science for Clinical Medicine: II. The Limitations of Randomized Trials

1983 • 257 citations

Effects of health insurance and race on colorectal cancer treatments and outcomes

2000 • 256 citations

Effectiveness of Chemotherapy for Advanced Lung Cancer in the Elderly: Instrumental Variable and Propensity Analysis

2001 • 252 citations

Aspirin Use and All-Cause Mortality Among Patients Being Evaluated for Known or Suspected Coronary Artery Disease

2001 • 244 citations

Patients' willingness to enter clinical trials: Measuring the association with perceived benefit and preference for decision participation

1991 • 241 citations

Informed consent for investigational chemotherapy: patients' and physicians' perceptions.

1984 • 239 citations

Determinants of Black/White Differences in Colon Cancer Survival

1995 • 229 citations

Survival Associated with 5-Fluorouracil–Based Adjuvant Chemotherapy among Elderly Patients with Node-Positive Colon Cancer

2002 • 221 citations

Generalizability of the surveillance, epidemiology, and end results registry population: Factors relevant to epidemiologic and health care research

1997 • 215 citations

Impact of Patient and Provider Characteristics on the Treatment and Outcomes of Colorectal Cancer

2001 • 196 citations

Race, treatment, and survival among colorectal carcinoma patients in an equal-access medical system

1998 • 168 citations

The Performance of Different Lookback Periods and Sources of Information for Charlson Comorbidity Adjustment in Medicare Claims

1999 • 167 citations

Overcoming potential pitfalls in the use of Medicare data for epidemiologic research.

1990 • 151 citations

Determinants of patient participation in clinical studies requiring informed consent: Why patients enter a clinical trial

1998 • 147 citations

Treatment Differences Between Blacks and Whites with Colorectal Cancer

1996 • 144 citations

Associations Between Community Income and Cancer Survival in Ontario, Canada, and the United States

1999 • 141 citations

Complications, comorbidities, and mortality: improving classification and prediction.

1997 • 105 citations

Comparing clinical information with claims data: Some similarities and differences

1991 • 95 citations

Epidemiologic Uses of Medicare Data

1993 • 85 citations

Medicare's common denominator: the covered population.

1980 • 80 citations

Cancer Treatment Protocols

1988 • 79 citations

Cancer patient accessions into clinical trials A pilot investigation into some patient and physician determinants of entry

1982 • 63 citations

The experimental paradigm and observational studies of cause-effect relationships in clinical medicine

1987 • 58 citations

Construct Validity of Medicare Chemotherapy Claims

2002 • 52 citations

Propensity-Score Matching with Instrumental Variables

2001 • 42 citations

The application of therapeutic-trial principles to improve the design of epidemiologic research: A case-control study suggesting that anticoagulants reduce mortality in patients with myocardial infarction

1981 • 41 citations

Adapting a clinical comorbidity index for use with ICD-9-CM administrative data: A response

1993 • 41 citations

Colon Cancer Treatment in Rural North and South Carolina

1999 • 36 citations

Influence of socioeconomic status on prognosis of colorectal cancer. A population-based study in C??te D'Or, France

1993 • 34 citations

Rural physicians' understanding of the state-of-the-art in breast, colon and rectum cancer treatment.

1999 • 28 citations

Do Black Elderly Medicare Patients Receive Fewer Services? An Analysis of Procedure Use for Selected Patient Conditions

1998 • 16 citations