December 2008 - EpiData-list - University of Manitoba Mailing Lists

Re: Dealing with 'Ongoing' duration in epicurves
by epidata-list＠lists.umanitoba.ca 02 Dec '08

02 Dec '08

"I would appreciate it if those working with outbreaks could reply about how they enter and display "ongoing" duration of illness." We create a graph showing at what time (date) the symptoms start and graph this according to exposure or time window. For epicurve the standard way of thinking is: ..............dayonset (start) ................................. ...... dayonset (start) ..................................... command could be: epicurve case dayonset In a different instance we would like to analyse "pattern of disease development" or pattern of how long time disease lasts begin ----------------------- end begin ----------------------------------------- (still under observation) The typical analysis here could be a Survival curve indicating length of disease period: Assume we have cases and string variables for start and end in the analysis. We would : read ourdata (or read from clipboard since these are copied from a spreadsheet). * generate two date variables for start and end of period: gen d stop = . if end <> "ongoing" then stop = date(end, "%dmy") gen d start = date(begin, "%dmy") * generate a case variable indicating if people were cured or are still under observation: gen i well = 0 if end <> "ongoing" then well = 1 * now we are ready for the analysis. notice the /mt which will assume that everyone with end time missing were observed until the latest of those where "stop" was "non-missing". lifetable well start stop /mt * an alternative would be to give the stop as a precise value: e.g. Dec 1st 2008 if end = "ongoing" then stop = dmy(1,12,2008) lifetable well start stop Notice that we did not change the "well" to 1 since keeping this with the value 0 indicates this observation was observed until given stop date, but did not develop disease. The lifetable would show median survival, possibly grouped or compared to a reference with the options "/by=sex /p25 ....." Regards Jens Lauritsen EpiData Association

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Dealing with 'Ongoing' duration in epicurves
by epidata-list＠lists.umanitoba.ca 02 Dec '08

02 Dec '08

I would appreciate it if those working with outbreaks could reply about how they enter and display "ongoing" duration of illness. I have been given an Excel sheet to analyse in Epidata. For this outbreak people were asked the date and time when they became unwell and the date and time when they felt better. There is a calculated field in the spreadsheet that calculates duration in days (date better - date unwell), but for some people this is empty because "ongoing" has been entered as text in the "date better" field. I want to modify the Excel sheet so I include those people with 'ongoing' illness in an epidemic curve. I thought I could enter a date sometime in the future instead of 'ongoing' This would mean the duration days would not be blank, but a number of days well beyond the maximum value for those whose illness is finished. What do others do? thanks Christine Christine Roseveare Analyst Regional Public Health 570 9194 027 495 9671 -- The information contained in this email and any attachments is confidential and may be legally privileged. If you have received this message in error, please notify the sender immediately and remove all copies of the message, including any attachments. Any views or opinions expressed in this email (unless otherwise stated) may not represent those of Hutt Valley DHB. Thank you. ** Disclaimer added by HVDHB **

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Re: EpiData-list Digest, Vol 62, Issue 1
by epidata-list＠lists.umanitoba.ca 02 Dec '08

02 Dec '08

Hello!Can you attached the file for me to figure out the problem for you. Regards Mensah On Mon, Dec 1, 2008 at 6:04 PM, <epidata-list-request(a)lists.umanitoba.ca>wrote: > Send EpiData-list mailing list submissions to > epidata-list(a)lists.umanitoba.ca > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.umanitoba.ca/mailman/listinfo/epidata-list > or, via email, send a message with subject or body 'help' to > epidata-list-request(a)lists.umanitoba.ca > > You can reach the person managing the list at > epidata-list-owner(a)lists.umanitoba.ca > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of EpiData-list digest..." > > EpiData-list mailing list > ___________________________________ > Today's Topics: > > 1. Export to SPSS requires 2 stage procedure > (epidata-list(a)lists.umanitoba.ca) > 2. Dealing with 'Ongoing' duration in epicurves > (epidata-list(a)lists.umanitoba.ca) > > > ---------- Forwarded message ---------- > From: epidata-list(a)lists.umanitoba.ca > To: epidata-list(a)lists.umanitoba.ca > Date: Sun, 30 Nov 2008 21:46:21 +0200 > Subject: [EpiData-list] Export to SPSS requires 2 stage procedure > Hello users and developers, > > I am using Epidata Entry 3.1 27 Jan 2008 on Windows XP Pro SP3. I have date > entered in .REC files. When I perform the export function using the drop > down menus, it does so fine, but the .SPS and .TXT files created are all > blank. If I try re-exporting (with Epidata Entry still open), and error > message pops up: "...data still in use..." or something like that. A > successful data export to SPSS is only possible if I complete quite Epidata > Entry and and start a new instance to perform the export procedure once > again. > > Could somone please verify this for me, and if so please explain what is > going on. It is quite frustrating that to have to do export in 2 stages. > > Thanks, > Shuaib > > > > ---------- Forwarded message ---------- > From: epidata-list(a)lists.umanitoba.ca > To: <epidata-list(a)lists.umanitoba.ca> > Date: Mon, 01 Dec 2008 11:18:23 +1300 > Subject: [EpiData-list] Dealing with 'Ongoing' duration in epicurves > I would appreciate it if those working with outbreaks could reply about how > they enter and display "ongoing" duration of illness. I have been given an > Excel sheet to analyse in Epidata. For this outbreak people were asked the > date and time when they became unwell and the date and time when they felt > better. There is a calculated field in the spreadsheet that calculates > duration in days (date better - date unwell), but for some people this is > empty because "ongoing" has been entered as text in the "date better" field. > I want to modify the Excel sheet so I include those people with 'ongoing' > illness in an epidemic curve. > > I thought I could enter a date sometime in the future instead of 'ongoing' > This would mean the duration days would not be blank, but a number of days > well beyond the maximum value for those whose illness is finished. What do > others do? > > thanks > > Christine > > Christine Roseveare > Analyst > Regional Public Health > 570 9194 > 027 495 9671 > > > > > > > -- > The information contained in this email and > any attachments is confidential and may be > legally privileged. If you have received this > message in error, please notify the sender > immediately and remove all copies of the message, > including any attachments. Any views or > opinions expressed in this email (unless > otherwise stated) may not represent those of > Hutt Valley DHB. > Thank you. > ** Disclaimer added by HVDHB ** > > > > ________________________________________ > EpiData-list(a)lists.umanitoba.ca > http://lists.umanitoba.ca/mailman/listinfo/epidata-list > > -- SEDZRO KOJO MENSAH P.O.Box AS 387 Ashaiman -Tema Ghana House : +233-22-300789 MOBILE : +233-244-458788 -------------------------------------------------- The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any computer.

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