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Some aspects of retrospective studies
Journal of Chronic Diseases, 1960The "retrospective" or "case-control" study provides a more economical way of estimating the relative risk of disease than the prospective method because it does not require the devotion of considerable study resources to those who did not develop the disease. In such a study one identifies all or a well-defined sample of the new cases of a disease as
William Haenszel, Jerome Cornfield
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A retrospective study of follicular lymphomas
Histopathology, 1989Sixty‐four cases of follicular lymphoma followed‐up for 10 years have been studied. The influence of age, sex, histological appearance, immunophenotype and T‐cell content on prognosis has been examined. Initial evaluation indicated that increasing age, relatively low numbers of intrafollicular T‐cells and absence of mantle zones around the neoplastic ...
S. D. Henderson +3 more
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Shigella Bacteremia: A Retrospective Study
Clinical Pediatrics, 2003The aims of this study were to determine the risk factors in, and the clinical and laboratory characterizations of, Shigella bacteremia, as well as the subspecies of Shigella, and the antibiotic susceptibility. A retrospective study of all patients younger than 18 years of age with documented Shigella bacteremia from January 1989 through December 2001
Shai Marcu +3 more
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Propranolol rebound—A retrospective study
The American Journal of Cardiology, 1978To assess the effects of sudden withdrawal of propranolol on inpatients with coronary artery disease, 102 patients admitted for cardiac catheterization were evaluated. Criteria for inclusion in the study were angiographically documented coronary artery disease, propranolol therapy at a mean daily dose of at least 80 mg and abrupt discontinuation of ...
Joseph D. Babb +6 more
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Retrospective study of optometric referrals
Ophthalmic and Physiological Optics, 1992We undertook a retrospective study of the referral patterns of optometrists. During the study period 13 107 patients had been seen, of whom 2.86% had been referred. Of the referred patients. 66.67% were referred to an ophthalmologist via the general practitioner. 25.87% to their general practitioner alone, and 7.47% directly to an ophthalmologist.
A. J. Hobley +2 more
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A Retrospective Study of Canine Pancytopenia
Veterinary Clinical Pathology, 1999Abstract—To better define the incidence and causes of canine pancytopenia, we retrospectively evaluated the results of complete blood counts submitted to the University of Minnesota Veterinary Teaching Hospital during a 1‐year period. Pancytopenia was defined as packed cell volume < 36%, total leukocyte count < 6, 000/μL or total segmented ...
Douglas J. Weiss +2 more
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Intussusception in adults: a retrospective study
Colorectal Disease, 2010AbstractObjective Intestinal intussusception in adult patients is rare. In contrast with paediatric patients, it is usually secondary to a definable lesion, often malignant. The purpose of this study was to determine the causes and the management of intussusception in adult patients.Method A retrospective review was performed looking at patients over
R.G. da Silva +5 more
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PANCREATITIS: A RETROSPECTIVE STUDY
Medical Journal of Australia, 1966Corlett Rj, Sali A, Jack Hansky
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The Prospective Retrospective Study
American Journal of Ophthalmology, 2018Julian D. Perry +2 more
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A retrospective and an observational study with acyclovir
Journal of Medical Virology, 1993Retrospective analysis: This open controlled non-randomized study was carried out to investigate the influence of intravenous acyclovir (ACV) on the incidence of post-herpetic neuralgia (PHN). Twelve women and 11 men (mean age 52 years, range 19-89) received ACV 5 mg/kg every 8 hours) for 10 days (I). Twenty-seven untreated patients (mean age 62 years,
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