TY - JOUR
T1 - An Improved Statistical Method for Assessing the Results of Operation
AU - Grunkemeier, Gary L.
AU - Lambert, Louis E.
AU - Bonchek, Lawrence I.
AU - Starr, Albert
N1 - Funding Information:
From the Division of Cardiopulmonary Surgery, University of Oregon Medical School, Portland, Ore. Supported by U. S. Public Health Service Grant no. HL 16461. Presented at the Eleventh Annual Meeting of The Society of Thoracic Surgeons, Montreal, Que., Canada, Jan. 20-22, 1975. Address reprint requests to Dr. Grunkemeier, 3181 S.W. Sam Jackson Park Rd., Portland, Ore. 97201.
PY - 1975
Y1 - 1975
N2 - The advantages of the actuarial method of analyzing postoperative survival are now widely accepted. In evaluating the late results of heart valve replacement operations, however, certain nonfatal complications must also be considered. The use of individual event-free rates does not portray individual risk, since some valves have multiple complications. By using cumulative complication-free rates, however, it is possible to estimate the percentage of valves active and free from certain major complications for each postoperative interval. A series of actuarial curves is used, each of which represents a different major complication. These curves are subtracted progressively from the total of valves at risk, and an actuarial representation of complication-free survival results.
AB - The advantages of the actuarial method of analyzing postoperative survival are now widely accepted. In evaluating the late results of heart valve replacement operations, however, certain nonfatal complications must also be considered. The use of individual event-free rates does not portray individual risk, since some valves have multiple complications. By using cumulative complication-free rates, however, it is possible to estimate the percentage of valves active and free from certain major complications for each postoperative interval. A series of actuarial curves is used, each of which represents a different major complication. These curves are subtracted progressively from the total of valves at risk, and an actuarial representation of complication-free survival results.
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U2 - 10.1016/S0003-4975(10)64221-X
DO - 10.1016/S0003-4975(10)64221-X
M3 - Article
C2 - 1164074
AN - SCOPUS:0016839657
SN - 0003-4975
VL - 20
SP - 289
EP - 298
JO - Annals of Thoracic Surgery
JF - Annals of Thoracic Surgery
IS - 3
ER -