IGNOU MST 25 2026 - A hypothetical study was conducted on ten participants who were follow

Question

A hypothetical study was conducted on ten participants who were followed up for the development of coronary heart disease (CHD) over a period of 10 years. The recorded data are given as follows:-P1 5 P2 8 P3 2 P4 6+ P5 9 P6 6 P7 10+ P8 4 P9 8 P10 4+ Estimate the survival function using the K-M method.

13 May 2026

Answer :

Word Count : 349

In the Kaplan-Meier (K-M) method, the survival probability is estimated at every observed event time. The symbol “+” indicates censored observations. Therefore, the data are interpreted as follows: Event times: 2, 4, 5, 6, 8, 8, 9 Censored times: 4+, 6+, 10+ First, arrange the observations in ascending order: 2, 4, 4+, 5, 6, 6+, 8, 8, 9, 10+ Initially, the number at risk (n = 10). At time (t = 2): * Number at risk (n_1 = 10) *

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