C. Ronald MacKenzie

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

Mary E. Charlson, Peter Pompei, Kathy L. Aleš et al. · Journal of Chronic Diseases · 1987 · 49.9K citations

Public Health, Biostatistics, Clinical Classification Systems +15

Supervised Fitness Walking in Patients with Osteoarthritis of the Knee

Pamela A. Kovar, John P. Allegrante, C. Ronald MacKenzie et al. · Annals of Internal Medicine · 1992 · 495 citations

Medicine, Orthopaedic Surgery, Orthopedic Surgery +17

Assessing illness severity: Does clinical judgment work?

Mary E. Charlson, Frederic L. Sax, C. Ronald MacKenzie et al. · Journal of Chronic Diseases · 1986 · 296 citations

Education, Clinical Sciences, Internal Medicine +14

Perioperative Outcomes after Unilateral and Bilateral Total Knee Arthroplasty

Stavros G. Memtsoudis, Yan Ma, Alejandro González Della Valle et al. · Anesthesiology · 2009 · 195 citations · Full text

Medicine, Orthopaedic Surgery, Surgery +14

Can the Sickness Impact Profile measure change? An example of scale assessment

C. Ronald MacKenzie, Mary E. Charlson, Denise DiGioia et al. · Journal of Chronic Diseases · 1986 · 177 citations

Nursing, Health Sciences, Health Assessment +13