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# HLTH 501 WEEK 8 PROBLEMS

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Author: Christine Farr
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http://theperfecthomework.com/hlth-501-week-8-problems-1/

HLTH 501WEEK 8 PROBLEMS—30 POINTS15 points each. Place answers within the Word document below.1. A study is conducted to estimate survival in patients following kidney transplant. Key factorsthat adversely affect success of the transplant include advanced age and diabetes. This studyinvolves 25 participants who are 65 years of age and older and all have diabetes. Followingtransplant, each participant is followed for up to 10 years. The following are times to death, inyears, or the time to last contact (at which time the participant was known to be alive).Deaths:Alive:1.2, 2.5, 4.3, 5.6, 6.7, 7.3 and 8.1 years3.4, 4.1, 4.2, 5.7, 5.9, 6.3, 6.4, 6.5, 7.3, 8.2, 8.6, 8.9, 9.4, 9.5, 10, 10, 10,and 10 yearsUse the life table approach to estimate the survival function. Use years intervals of0–2; 2–4;Complete the table below.IntervalinYearsNumberAt RiskDuringInterval,NtAverageNumber AtRisk DuringInterval,Nt* =Nt-Ct /2Numberof DeathsDuringInterval,DtLost toFollowUp,CtProportionDyingqt = Dt/Nt*ProportionSurvivingpt = 1-qtSurvivalProbabilitySt = pt*St-10–22–44–66–88–10Use the Kaplan-Meier approach to estimate the survival function.Complete the table belowTime,Years01.22.53.44.1

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