CALCULATION OF SAMPLE SIZE IN SURVIVAL STUDIES AND IT'S APPLICATION IN THE ASSESSMENT OF NON-HODGKIN LYMPHOMA

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BABAEI GH.R.; FAGHIHZADEH S.; GHADIMI M.R.

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Journal Paper

Paper Information

Journal: Journal of Sabzevar University of Medical Sciences Year:2002 | Volume:8 | Issue:4 (22) Page(s): 72-78

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Information Journal Paper

Title

CALCULATION OF SAMPLE SIZE IN SURVIVAL STUDIES AND IT'S APPLICATION IN THE ASSESSMENT OF NON-HODGKIN LYMPHOMA

Author(s)

BABAEI GH.R. | FAGHIHZADEH S. | GHADIMI M.R. | Issue Writer Certificate

Keywords

EXPONENENTLAL DISTRIBUTIONQ4

POWER CALCULATIONQ4

PROPORTIONAL HAZARD MODELQ4

Abstract

In non-random studies, calculation of sample size for failure time (survival) random variables is usually done on the basis of unadjusted log rank test. Supposing that a certain variable is independent from other variables of the patient, we developed the methods suggested by lipstiz and Parzan to show that the power obtained from unadjusted log rank test for the event time, random variable overestimated the real power when that variable correlated with other variables. Using exponential regression and the sample size obtained from the formula, we modelled the hazard continuum for both censored and uncensored data. We then used the suggested methods with the collected data for the prognosis of influential factors in non-hodgkin lymphoma.

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APA: Copy

BABAEI, GH.R., FAGHIHZADEH, S., & GHADIMI, M.R.. (2002). CALCULATION OF SAMPLE SIZE IN SURVIVAL STUDIES AND IT'S APPLICATION IN THE ASSESSMENT OF NON-HODGKIN LYMPHOMA. JOURNAL OF SABZEVAR UNIVERSITY OF MEDICAL SCIENCES, 8(4 (22)), 72-78. SID. https://sid.ir/paper/81899/en

Vancouver: Copy

BABAEI GH.R., FAGHIHZADEH S., GHADIMI M.R.. CALCULATION OF SAMPLE SIZE IN SURVIVAL STUDIES AND IT'S APPLICATION IN THE ASSESSMENT OF NON-HODGKIN LYMPHOMA. JOURNAL OF SABZEVAR UNIVERSITY OF MEDICAL SCIENCES[Internet]. 2002;8(4 (22)):72-78. Available from: https://sid.ir/paper/81899/en

IEEE: Copy

GH.R. BABAEI, S. FAGHIHZADEH, and M.R. GHADIMI, “CALCULATION OF SAMPLE SIZE IN SURVIVAL STUDIES AND IT'S APPLICATION IN THE ASSESSMENT OF NON-HODGKIN LYMPHOMA,” JOURNAL OF SABZEVAR UNIVERSITY OF MEDICAL SCIENCES, vol. 8, no. 4 (22), pp. 72–78, 2002, [Online]. Available: https://sid.ir/paper/81899/en

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