survival curve


Also found in: Dictionary, Thesaurus, Encyclopedia.

curve

 [kerv]
a line that is not straight, or that describes part of a circle, especially a line representing varying values in a graph.
dose-effect curve (dose-response curve) a graphic representation of the effect caused by an agent (such as a drug or radiation) plotted against the dose, showing the relationship of the effect to changes in the dose.
growth curve the curve obtained by plotting increase in size or numbers against the elapsed time.
oxyhemoglobin dissociation curve a graphic curve representing the normal variation in the amount of oxygen that combines with hemoglobin as a function of the partial pressures of oxygen and carbon dioxide. The curve is said to shift to the right when less than a normal amount of oxygen is taken up by the blood at a given Po2, and to shift to the left when more than a normal amount is taken up. Factors influencing the shape of the curve include changes in the blood pH, Pco2, and temperature; the presence of carbon monoxide; alterations in the constituents of the erythrocytes; and certain disease states.
pulse curve sphygmogram.
Spee curve (curve of Spee) the anatomic curvature of the occlusal alignment of teeth, beginning at the tip of the lower canine, following the buccal cusps of the premolars and molars, and continuing to the anterior border of the ramus.
strength-duration curve a graphic representation of the relationship between the intensity of an electric stimulus at the motor point of a muscle and the length of time it must flow to elicit a minimal contraction; see also chronaxie and rheobase. In cardiac pacing it is useful in determining characteristics of a particular pacing electrode and determining the most efficient selection of pacing parameters for an appropriate safety margin.
survival curve a graph of the probability of survival versus time, commonly used to present the results of clinical trials, e.g., a graph of the fraction of patients surviving (until death, relapse, or some other defined endpoint) at each time after a certain therapeutic procedure.

survival curve

[sərvī′vəl]
Etymology: Fr, survivre, to survive; L, curvus, bent
a plot of the number or percentage of organisms surviving for a given period as a function of radiation dose.

survival curve

Epidemiology A curve that starts at 100% of the study population and shows the percentage of the population still surviving at successive times for as long as information is available. See Survival.

survival curve

In radiobiology, a dose response curve.
See also: curve
References in periodicals archive ?
A significant [chi square] goodness-of-fit test was obtained for all seed lots when all of the data (full data set) were included in the analysis of the survival curves.
After checking the proportionality of the selected variables by the "Log minus Log" test, the analysis of the survival curves was performed using the Kaplan-Meier method and Log-rank test (29), with significance level of 5%, with accumulated survival probability in months, according to each variable of interest.
Kaplan-Meier survival curve for all-cause mortality by: (A) hs-cTnl RCVs among patients with moderate hs-cTnl concentrations (tertile 2).
Overall survival curve for ampullary carcinoma with pT1b was different from pT1a and closer to pT2.
The survival curve comparing the alcoholics and the abstainers was not statistical significant (p = 0.
For each treatment, the survival curve estimated by Kaplan-Meier and the survival curves defined by the parametric models were adjusted using the survreg function of the R software (R DEVELOPMENT CORE TEAM, 20 ii).
The predicted survival curve of the home-to-work travel duration of Program A
The Kaplan-Meier survival curve of ICU patients divided into the 3 age groups revealed no statistically significant differences in mortality rates (Fig.
Using the Kaplan-Meier survival curve, we observed that female patients had 1.
In addition, Figure 1 demonstrates that (Vp - Vi)/ p, in which Vp is the probit viability at time p and for which Vi is the initial germination in probit and is a measure of the slope of the seed survival curve.

Full browser ?