Kaplan-Meier survival analysis (KMSA) is a method that involves generating tables and plots of the survival or the hazard function for the event history data. Kaplan-Meier survival analysis (KMSA) does not determine the effect of the covariates on either function. It is a kind of explanatory method for the time to event, where the time is considered as the most prominent variable.
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Kaplan-Meier survival analysis (KMSA) consists of certain terms that are very important to know and understand, as these terms form the basis of a strong understanding.
The censored cases in Kaplan-Meier survival analysis (KMSA) indicate those cases in which the event has not yet occurred. In this case the event is considered as the variable of interest for the researcher. It can efficiently compute the survival functions in those cases that are censored in nature.
The time is considered as the continuous variable. However, the researcher should note that the initial time of the occurrence of the event must be clearly defined.
There is a variable called a status variable in Kaplan-Meier survival analysis (KMSA). This variable defines the terminal event. This variable should always be continuous in nature and should always be a categorical type of variable.
There is a variable called the stratification variable in Kaplan-Meier survival analysis (KMSA). As the name suggests, the stratification variable should be a categorical type of variable. This variable represents the grouping effect. In the medical field, the stratification variable can be types of cancer, like lung cancer, blood cancer, etc. The researcher should note that Kaplan-Meier survival analysis (KMSA) provides incorrect results when covariates other than the time are considered as the prominent aspect in obtaining the extent of a certain consequence.
There is a variable called a factor variable in Kaplan-Meier survival analysis (KMSA). The factor variable should be of categorical type. This type of variable is used by the researcher to indicate the causal effect of a particular consequence. For example, in the case of the previous example, the treatment applied to decrease the effect of the cancer in the body is considered to be the factor variable.
The factor variable in Kaplan-Meier survival analysis (KMSA) is the main grouping variable, whereas the stratification variable is the sub grouping variable.
Kaplan-Meier survival analysis (KMSA) can be carried out by the researcher with the help of SPSS software.
The log rank test in Kaplan-Meier survival analysis (KMSA) provided in SPSS allows the investigator to examine whether or not the survival functions are equivalent to each other, by measuring their individual time points.
There are certain assumptions that are made in Kaplan-Meier survival analysis (KMSA). For one, it is assumed that the events that occur in the survival function are the dependent variables that depend only upon the time. This is due to the fact that it has been assumed that survival is always based upon time. Thus, this implies that in Kaplan-Meier survival analysis (KMSA), both the censored and uncensored cases perform in similar manners.