- EpiData-list - University of Manitoba Mailing Lists

PDA entry
by epidata-list＠lists.umanitoba.ca 15 Oct '08

15 Oct '08

I do not have any experience with PDA, but I have used a software called PenDragon in a vaccine survey a time a go. This is used in palm tops. Its functionallity is very similar to EpiData. I guess a I did not help much, Sorry, Pedro Brasil

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PDA entry
by epidata-list＠lists.umanitoba.ca 15 Oct '08

15 Oct '08

Does anyone have any experience or suggestions for suitable data capture software on PDAs that will collect data in a form usable by EpiData? We're looking to do an immunisation survey. Flat file will be sufficient, no need for related fields. Tony Stewart

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OR error report
by epidata-list＠lists.umanitoba.ca 14 Oct '08

14 Oct '08

This is concerning to v2.0.3.129 EpiData Analysis. Recently I dig in to OR and RR using said version. The data base I used was one used in SPSS to do the same. In essence, the calculation result were different from what I obtained from SPSS, given that I recoded outcomes and risk exposures, i.e. 1=2, 2=1. (SPSS uses ascending order for both outcomes and risk exposures, 1 codes as positive 2 as negative which is just the opposite of EpiData Analysis handling) EpiData Analysis result: OR=3.68 (95% CI: 1.03-11.89)Fishersexact p= 0.0224 SPSS result: OR=3.72 (3.7158) (95% CI: 1.27039-10.86604) Fishersexact p=.02239 Whereas RR resulted the same. EpiData Analysis: RR = 2.86 (95% CI: 1.31-6.24)Fishersexact p= 0.0224 SPSS: RR = 2.86 (2.85789) (95% CI: 1.30965-6.23646) USING CELL OBSERVED FREQUENCIES AS A=6, B=13, C=20, D=161 WHEREAS A:C1R1, B:C2R1, C:C1R2, D:C2R2. I wonder if the formula used by EpiData Analysis is OR=(A/C)/(B/D)=(A/B)/(C/D)= (AD)/(BC). The OR as well as corresponding CI are different from that of SPSS. The attached .dbf file uses RV3 as outcome variable and RRIESGO as risk exposure variable using code 2 as positive for both variables.

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Problem with STATTABLES command
by epidata-list＠lists.umanitoba.ca 10 Oct '08

10 Oct '08

Good morning Jens, I have a problem with saving the results of a stattables command to another file. The command I use is: stattables bcg3 /stat="sum" /by="mth" save="c:\downloads\epidata\testsave.rec" (In analysis, this command is all on one line) I have not had this problem with versions prior to build 148. The correct table is produced in the output screen, but the testsave.rec file is not created. Nor is there any indication in analysis that there might be a problem. I have tried specifying the full path (as in this example) as well as just specifying the filename testsave.rec. I have also tried it with the /replace option. Annemieke van Middelkoop Pretoria, South Africa

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Adapted EpiData Analysis b149 ready
by epidata-list＠lists.umanitoba.ca 08 Oct '08

08 Oct '08

A few errors have been reported in the b148 of analysis of last week. These are now fixed, and a new build uploaded for testing. (Users who have taken b148 and are not using compact tables can continue with b148 and report). If no major bugs are found the build 149 will be released as v2.1 at the end of this week for general use replacing current build 2.0 on the download page. regards Jens Lauritsen EpiData Association

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multiple response (& server is up again)
by epidata-list＠lists.umanitoba.ca 07 Oct '08

07 Oct '08

The server is now up and running again. (All scripts have been checked - there were no problems, but only assumed problems). Off list the following question was asked regarding EpiData Analysis > Hi There, > I have a question that i am trying to evaluate with a multi response answer. > I have set out the question as follow with a text variable for each answer: > > Q1: What fruit do you like _ _ _ _ _ > a - Apples b - Orange c - Banana d - Pear e - Grapes > Now when i go to analyse this, is there a way i can graph the response > for this answer on a bar graph? I cannot seem to be able to add > multiple series into the graph to compare all answers for this question? Currently bar graphs can only take one variable at a time. Except for box and scatter/line plots for several variables. Box plots for several variables has just been introduced with the pre v2.1 - v2.0.5.148 version. For all graphs a /by variable has been introduced, but this does not change the basic limitation of one variable per plot. What you could do to analyse the data is to use stattables and count binary indicators calculated like this: gen i apple = (pos(q1, "a" ) > 0) gen i orange = (pos(q1, "b" ) > 0) etc for the other fruits. stattable apple orange ......../stat="sum" /N /close * then in the new file with counts of the fruits and the total some percentages could be worked out. A graph showing the combinations of the variables in the form of a VENN diagram could be a solution, but currently this cannot be done with EpiData Analysis. I wrote a command for Stata for this: See: http://www.stata.com/products/stb/journals/stb47.pdf . The initial version has been extended with four factor ellipses. We could consider including Venn diagrams in a later version (but at the earliest second quarter 2009) and also a multiple response tables command. regards Jens Lauritsen EpiData Association

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website epidata.dk is down due to attempts of "phishing"
by epidata-list＠lists.umanitoba.ca 06 Oct '08

06 Oct '08

The webserver company claims someone tried to use the epidata.dk site for spamming. I will notify when the server is up again. regards Jens Lauritsen EpiData Association

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Final test version of rel 5 v2.0.5.148 placed on testing.php page
by epidata-list＠lists.umanitoba.ca 01 Oct '08

01 Oct '08

The final build for testing of release candidate of v2.1 EpiData Analysis has been placed on the page: http://www.epidata.dk/testing.php After testing of build 148 by users this will be released as v2.1 replacing current general download version, which has a number of known problems/bugs. Please report any problem with b148 to the list or discuss principles here. There will be NO further implementation of function before release of v2.1 - only fixing any bugs reported. Many issues have been solved - among these unification of commands, new lifetable and stattable command and fixing titles for graphs. Among many other extensions the possibility of making box plots for several variables in the same graphs and further user "set" specifications of headers in table and output can be mentioned. The principle of /by variable has been implemented where relevant, and a new reporting oriented command stattable has been introduced, where summary measures can be used. Unification means that all tables or graphs working with an outcome variable will have this variable first, examples: epicurve outcome timevar lifetable outcome timevar tables outcome exposure ciplot outcome variables The lifetable takes on two forms with explicit time variable and the possibility of giving as well "date of entry" and "date of exit", plus an option /MT "missing time" to indicate how to handle missing data on the "exit" variable, e.g. when follow-up is still ongoing. Lifetable implements the principles of confidence intervals published by Altman et al in "statistics with confidence" e.g. estimates at specified levels of survival (median and quartiles) or survival with confidence intervals at specified times. The plan is to implement other "Statistics with confidence - CI principles" in the coming year. All commands are documented in the commands.htm file, which will be shown when hitting the F1 button with an empty command prompt. (But I am quite sure, there could be some deficiencies in the documentation, so please report these). I wish to give credit for the current extension and intensified development, which is only possible by funding of full time academic programmer for the project by various projects credited on the www.epidata.dk/funding.htm page and the willingness of people to take on tasks. More about the funding sources and staff listing will be revealed when v2.1 is released. Work now continues with implementation of further SPC (statistical process control) graphs, these will be included for general use accompanied by full implementation of translation in v2.5. regards Jens Lauritsen EpiData Association

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Alyshia Landry is out of the office.
by epidata-list＠lists.umanitoba.ca 30 Sep '08

30 Sep '08

I will be out of the office starting 09/27/2008 and will not return until 10/06/2008. If you require immediate assistance, please contact Celina Sousa at extension 5300. Thank-you, Alyshia

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numerical to date chk?
by epidata-list＠lists.umanitoba.ca 30 Sep '08

30 Sep '08

Dear Epidata list, I am looking for a way to generate a date-variable from a numerical-variable. i.e. I will type in the Danish central person registration number (10 digits where the 6 first digits are the birthday ddmmyy) I would like to automatically create a date variable from this - to calculate ages at later dates. I have looked for a chk that would do it, but couldn't find any. Does anybody have a solution? (and sorry if this has been discussed before, I searched and couldn't find any relevant discussion threads) thanks in advance, Drude Molbo, data admin dept. of social medicine, KU DK

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