A randomized trial was conducted to examine whether surgery can influence the time to recurrence of...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
A randomized trial was conducted to examine whether surgery can influence the time to recurrence of brain metastasis for patients undergoing treatment for a single brain metastasis. Subjects were randomly assigned to receive surgery or not in addition to standard radiotherapy. The times to recurrence for the two groups are in the table below. Table: Time to recurrence of brain metastasis (weeks) by treatment group. Censored times are marked with (*). Radiotherapy Alone 2*, 2*, 2, 3, 4, 5, 5*, 6, 7, 8, 9, 10, 14, 14*, 18, 19, 20, 22, 22*, 31*, 33, 39, 195* Surgery plus radiotherapy 2*, 2*, 6*, 6*, 6*, 10*, 14*, 21*, 23, 29*, 32*, 34*, 34*, 37, 37*, 42*, 51, 57, 59, 63*, 66*, 71, 71*, 73*, 85* a. Produce (draw) a Kaplan-Meier survival curve for both groups on the same plot. Use the template on the cover pages for this assignment (or create something similar). b. What is the median time to recurrence for each group? A randomized trial was conducted to examine whether surgery can influence the time to recurrence of brain metastasis for patients undergoing treatment for a single brain metastasis. Subjects were randomly assigned to receive surgery or not in addition to standard radiotherapy. The times to recurrence for the two groups are in the table below. Table: Time to recurrence of brain metastasis (weeks) by treatment group. Censored times are marked with (*). Radiotherapy Alone 2*, 2*, 2, 3, 4, 5, 5*, 6, 7, 8, 9, 10, 14, 14*, 18, 19, 20, 22, 22*, 31*, 33, 39, 195* Surgery plus radiotherapy 2*, 2*, 6*, 6*, 6*, 10*, 14*, 21*, 23, 29*, 32*, 34*, 34*, 37, 37*, 42*, 51, 57, 59, 63*, 66*, 71, 71*, 73*, 85* a. Produce (draw) a Kaplan-Meier survival curve for both groups on the same plot. Use the template on the cover pages for this assignment (or create something similar). b. What is the median time to recurrence for each group?
Expert Answer:
Related Book For
Posted Date:
Students also viewed these law questions
-
A researcher wanted to find out if there was difference between older movie goers and younger movie goers with respect to their estimates of a successful actors income. The researcher first...
-
A survey of information systems managers was used to predict the yearly salary of beginning programmer/analysts in a metropolitan area. Managers specified their standard salary for a beginning...
-
List all types of bonding present in the compound CaCO3. List all types of bonding present in the compound CaCO3. I. ionic bond II. polar covalent bond III. nonpolar covalent bond A. I only B. II...
-
Consider an RLC circuit with R = 105 , L = 518 mH, and C = 0.200 mF. (a) At what frequency is this circuit in resonance? (b) Find the impedance of this circuit if the frequency has the value found in...
-
A town in America has 2400 families and 4200 cars. What is the family : car ratio a. In its simplest form b. In the form 1 : n.
-
This case deals with several issues regarding contract formation under the UCC. Logan and Kanawha Coal agreed to purchase coal from Detherage via a fax dated March 9, 2010. The fax stated that it had...
-
Kumar Inc. uses a perpetual inventory system. At January 1, 2011, inventory was $214,000 at both cost and market value. At December 31, 2011, the inventory was $286,000 at cost and $265,000 at market...
-
Water is supplied to a fountain via a large pipe. Somewhere along the flow path a troublesome teenager injects a soap solution at a rate of 3 . 2 4 g / s in an attempt to create a grand sudsy mess....
-
. With the information generated from the following table derivate from the Bureau of Economic Analysis (https://apps.bea.gov/iTable/index_nipa.cfm), please do the regression analysis, with the...
-
A leather goods company has recently experienced declining profits. Management has decided to investigate the manufacturing operation (and costs) of its leather belts, that are produced in a single...
-
Why should irrelevant costs and revenues be omitted from a decision analysis?
-
What is the difference between eco-efficiency and eco-balance?
-
What are non-current liabilities? Give several examples.
-
Describe how to calculate a business' collections from customers during an accounting period, based on an analysis of its income statement and its beginning and ending balance sheets.
-
Is sustainability in terms of a business all about environmental matters? Why or why not?
-
a). The ideal situation for every economy will be for the forces of demand and supply or the free market to allocate resources efficiently. However, the market sometimes fails to allocate resources...
-
Describe a job you have had in the past or a job you are very familiar with. Indicate the negative aspects of the job and how it could be improved with current human resource management techniques.
-
Suppose the flight attendants total duration of employment is 20 years. What is the probability that he/she encounters at least 10 IFMs on his/her flights over a 20-year period? Make the same...
-
What is the smallest number of hepatomas that would have to be observed among the alcoholics with cirrhosis of the liver for the hepatoma experience in this group to differ from the hepatoma...
-
Compute appropriate descriptive statistics for each nutrient for both DR and FFQ, using both numeric and graphic measures? Table: 2.18 Format for VALID.DAT Variable ________________________ Format or...
-
Consider a Lagrangian \(L^{\prime}=L+d f / d t\), where the Lagrangian is \(L=\) \(L\left(q_{k}, \dot{q}_{k}, tight)\), and the function \(f=f\left(q_{k}, tight)\). (a) Show that...
-
Show that the function \(L^{\prime}\) given in the preceding problem must obey Lagrange's equations if \(L\) does, directly from the principle of stationary action. Lagrange's equations do not have...
-
In Example 4.8 we analyzed the case of a bead on a rotating parabolic wire. The energy of the bead was not conserved, but the Hamiltonian was: There is an equilibrium point at \(r=0\) which is...
Study smarter with the SolutionInn App