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From |
Ronnie Babigumira <rb.glists@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Descriptive statistics - counting aspects of a variable |

Date |
Sun, 3 Jun 2012 17:23:00 +0200 |

You ask .....how do I find out how many have a diagnoses with numbers in combination with letters (like 618A)... Are you looking for a simple count? If yes, -count- as you have done is one way of doing it but you could also use -tab- and many other -tab- relatives on ssc. Always nice to show some data (an easy way to do this is to advantage of the very useful -writeinput- on ssc. To install, type -ssc install writeinput-) // create a demo dataset clear set seed 000111 set obs 20 gen id = _n gen xxt = uniform() g xx = cond(xxt < .3, "680H", cond(xxt < .6, "720H", cond(xxt < 1,"616",""))) list // How many have 616 count if xx == "616" // See how many had the different diagnoses tab xx -- 010100100110111101101110011011100110100101100101 On Sunday, June 3, 2012 at 4:24 PM, Amal Khanolkar wrote: > Hello all, > > I have a variable XX that describes various diagnoses that my subjects might have. Diagnoses are coded using the usual ICD 8-10 codes. While most diagnoses are just numerical, some end with an alphabet, for e.g. 618A or 720H. > > I can ask Stata to tell me how many subjects in my dataset have diagnoses 618 by: > > count if XX==616 > > However how do I find out how many have a diagnoses with numbers in combination with letters (like 618A). Stata isn't able to tell me using the 'count' or 'sum' commands as above. > > Thanks, > > /Amal. > > > > * > * For searches and help try: > * http://www.stata.com/help.cgi?search > * http://www.stata.com/support/statalist/faq > * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: Descriptive statistics - counting aspects of a variable***From:*Amal Khanolkar <Amal.Khanolkar@ki.se>

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