STATA SOFTWARE

SURVIVAL ANALYSIS

Data Editor (Browse) - [bc] File Edit View Data Tools age[1] 30 age smoking dietfat t dead 30 1 4.919 14.2 50 4.437 8.21 1 47 0 5.85 5 . 64 1 49 1 5.149 4 . 42 1 52 1 4.363 2.81 1 6 29 0 6. 153 35 0 49 1 3 . 82 4.57 1 8 27 1 5.294 35 O 9 47 0 6. 102 3.74 1 10 59 4.446 2.29QUESTION 1 The dataset be, on breast cancer, is installed with STATA and can be retrieved by typing webuse be in the command window. The dataset has the following variables: age, smoking, dietfat, t, and dead; where t is the time variable and dead is the event variable. In each of the questions below, please report STATA code and relevant output. (1.1) Fit simple Weibull regression models containing each of the variables: age, smoking, and dietfat. Comment on the point estimates of the hazard ratios and comment on their significance using the 95% confidence intervals.ta/IC 15.0 - http://www.stata-press.com/data/r15/bc.dta Edit Data Graphics Statistics s User Window Help Variables W TAX webuse bc Filter variables here ilter commands here Name Label Command _rc describe age drop age-time ...... webuse bo Contains data from http: //www.stata-press. com/data/r15/bc. dta smoking obs : 80 dietfat average weekly ca... describe vars: 3 Mar 2016 14:06 size : 880 dead storage display value variable name type format label variable label age byte $9.0g smoking byte $9.0g dietfat float 19. 0g average weekly calories from fat t float $9.0g dead byte $9.0g Sorted by:webuse bo describe Contains data from http://www.stata-press. com/data/r15/bc. dta obs : 80 vars : 5 3 Mar 2016 14:06 size: 880 storage display value variable name type format label variable label age byte $9. 0g smoking byte $9 .0g dietfat float $9.0g average weekly calories from fat +. float 19.0g dead byte $9. 0g Sorted by: streg age, dist (weibull) nolog data not st r (119) ; streg i. smoking, dist (weibull) nolog data not st r (119) ; streg dietfat, dist (weibull) nolog data not st r (119) ; Command