Please consider this example data:
Code:
* Example generated by -dataex-. To install: ssc install dataex clear input str11 id float(year surgerydate dischargedate) "251546/3" 2007 17258 17280 "251546/3" 2007 17258 17280 "991523/01" 2007 17259 17266 "622810/3" 2007 17259 17265 "992424/01" 2007 17260 17272 "991880/01" 2007 17260 17267 "992424/01" 2007 17260 17272 "960950/2" 2007 17260 17268 "990923/01" 2007 17261 17270 "697025/4" 2007 17261 17274 "108844/01" 2007 17261 17263 "820882/4" 2007 17261 17261 "127408/2" 2007 17261 17269 "992102/01" 2007 17261 17265 "185089/3" 2007 17261 17265 "991653/01" 2007 17261 17266 "992890/01" 2007 17261 17269 "127407/2" 2007 17262 17265 "473752/01" 2007 17262 17269 "992952/01" 2007 17262 17269 "517830/2" 2007 17262 17270 "990896/01" 2007 17262 17263 "697023/3" 2007 17262 17269 "990933/01" 2007 17262 17269 "137595/3" 2007 17262 17272 "619651/01" 2007 17262 17263 "992852/01" 2007 17262 17264 "992836/01" 2007 17262 17265 "992243/01" 2007 17262 17266 "386580/3" 2007 17262 17269 "334471/4" 2007 17262 17265 "622842/2" 2007 17262 17263 "499304/01" 2007 17262 17268 "991488/01" 2007 17262 17263 "864925/6" 2007 17262 17268 "991095/01" 2007 17262 17270 "385971/01" 2007 17262 17263 "991188/01" 2007 17262 17269 "992416/01" 2007 17263 17265 "359888/4" 2007 17263 17274 "991753/01" 2007 17263 17273 "992966/01" 2007 17263 17276 "517153/2" 2007 17263 17270 "75960/3" 2007 17263 17265 "829202/2" 2007 17263 17273 "992737/01" 2007 17263 17274 "991309/01" 2007 17263 17293 "1291261/2" 2007 17263 17270 "992975/01" 2007 17264 17268 "991938/01" 2007 17264 17273 "762746/4" 2007 17264 17271 "97798/2" 2007 17264 17272 "992863/01" 2007 17265 17273 "692341/2" 2007 17265 17268 "992437/01" 2007 17265 17276 "993024/01" 2007 17265 17273 "991346/01" 2007 17265 17270 "638566/3" 2007 17265 17274 "496736/2" 2007 17265 17270 "992789/01" 2007 17265 17273 "904146/2" 2007 17265 17307 "991852/01" 2007 17265 17268 "147289/3" 2007 17265 17274 "993075/01" 2007 17265 17266 "21468/2" 2007 17265 17272 "991254/01" 2007 17265 17272 "990941/01" 2007 17265 17274 "871/2" 2007 17265 17275 "804281/2" 2007 17265 17280 "361267/3" 2007 17265 17273 "127406/3" 2007 17265 17275 "61523/2" 2007 17266 17274 "991345/01" 2007 17266 17270 "991926/01" 2007 17266 17275 "987499/5" 2007 17266 17273 "991771/01" 2007 17266 17271 "990869/01" 2007 17266 17276 "323668/5" 2007 17266 17272 "359889/3" 2007 17266 17274 "447549/2" 2007 17266 17269 "992210/01" 2007 17266 17274 "991225/01" 2007 17266 17273 "990939/01" 2007 17266 17271 "991543/01" 2007 17266 17270 "517152/4" 2007 17266 17274 "991913/01" 2007 17266 17270 "757203/2" 2007 17266 17275 "992706/01" 2007 17266 17275 "108843/2" 2007 17266 17277 "992343/01" 2007 17266 17272 "138302/2" 2007 17266 17274 "991431/01" 2007 17266 17274 "1260671/2" 2007 17266 17273 "61523/2" 2007 17266 17274 "108843/2" 2007 17266 17277 "992902/01" 2007 17266 17275 "991562/01" 2007 17266 17287 "510164/2" 2007 17266 17273 "991011/01" 2007 17266 17275 "992474/01" 2007 17266 17270 end format %td surgerydate format %td dischargedate
Any help in this regard would be greatly appreciated.
Thanks,
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