[R] ICD9 codes

Frank E Harrell Jr f.harrell at Vanderbilt.Edu
Sat May 29 14:46:40 CEST 2010

Thanks for both your note Ted and Vishwanath.  I had no idea this was 
going on.


On 05/29/2010 05:43 AM, (Ted Harding) wrote:
> It is perhaps time to bring to people's general attention that
> there is an issue with postings from gmail.com addresses being
> held for moderation because "The headers matched a filter rule".
> It is not only gmail.com, but there is a marked excess of these.
> Vishwanath (@gmail.com) is one of many victims.
> There is a group of about a dozen people who act as moderators,
> approving or discarding messages which have been held. Reasons
> for holding are almost always either "Posting from Non-Member"
> or "Matched a Filter Rule". We do this somewhat non-systematically,
> looking at the list of held messages on a "convenience" basis.
> However, it would be unlikely that any valid message would be
> held for more than an hour or so; usually it would be less.
> The situation has been discussed recently amongst the moderators,
> including the list manager Martin Maechler. We are undecided
> about the best action (if any) -- while the excessive false
> trapping of gmail.com postings is at least an inconvenience
> for the trapped, and sometimes leads to visible distress or
> embarrassment, the presence of the filter rules does prevent
> spam from reaching the list.
> Vishwanath's reaction in repeatedly re-posting is perhaps
> understandable on the part of someone who is not familiar with
> how the moderation system operates. In fact he posted the same
> message 4 times (morning&  evening on 27 May, and again on 28 May)
> as can be seen from the archives. He is subscribed to the list,
> so would normally receive copies of his own postings via the list
> (and therefore know that it had got through) unless he has opted
> to not receive his own postings. In that case, having received
> the "held for moderation" message, not receiving his posting via
> the list, and not thinking of looking in the archives, he could
> form the impression that it/they had vanished into a black hole,
> and try again.
> Since we began to discuss this about a fortnight ago, I have
> been keeping a count of those held messages which I have seen
> myself. Not counting true spam, only genuine messages, the results
> are as follows. "NM" denote a posting from a non-member, "FR"
> denotes a posting that matched a filter rule, "GM" denotes a
> posting from a gmail.com address, "NGM" one not from gmail.com.
>        FR     NM
> ----+-----+-----
> GM  | 45  |   4
> ----+-----+-----
> NGM | 19  |  24
> Fisher test: P=7.3e-07, OR=13.7, CI=(4.0, 62.0)
> About 30% of R-help subscribers have gmail.com addresses, so they
> are clearly over-represented in the "FR" group (70%)!
> It is suspected that the gmail.com "filter rule" may perhaps be
> triggered by HTML, though the reason is not yet clear.
> Meanwhile, a reminder to people who receive notification that
> their posting has been held for moderation: Please check the
> archives to see whether your message has reached the list within
> a reasonable time (say 2 hours -- there can be a delay before a
> message is placed in the archives) beforetrying to do anything
> about it: https://stat.ethz.ch/pipermail/r-help
> Hoping this helps to clarify an issue which can lead to unwanted
> consequences.
> Ted.
> On 29-May-10 05:42:27, Vishwanath Sindagi wrote:
>> Dear Prof Frank Harrel:
>> I am extremely sorry for having reposted the same question numerous
>> times. Earlier when I had posted I got  replies stating that my post
>> had matched a filter rule and hence was being held by the moderator.
>> So I assumed that the question was never posted and I reposted with
>> different subject lines just to make sure that it gets posted.
>> I sincerely apologise for the inconvenience caused.
>> Regards,
>> Vishwanath
>> On Sat, May 29, 2010 at 4:10 AM, Frank E Harrell Jr
>> <f.harrell at vanderbilt.edu>  wrote:
>>> Your notes are bordering on harassment. _Do you expect that everyone
>>> who
>>> reads this list will reply "I do not have anything that will help you"
>>> if
>>> they don't? _By my count this is your 4th note asking for this help.
>>> That being said I hope that you do find help somewhere or implement it
>>> yourself and share the result, as your question is an important one.
>>> Also, please be sure to state your affiliation on your notes.
>>> Frank
>>> On 05/28/2010 02:19 PM, Vishwanath Sindagi wrote:
>>>> Hello:
>>>> I am working on getting some statistics related to clinical trials
>>>> and
>>>> stuff. I have to work with ICD9 codes.
>>>> Is anyone aware of any R method that deals with ICD9 codes
>>>> verification and manipulation.
>>>> Thanks
>>>> Vishwanath
>>> --
>>> Frank E Harrell Jr _ Professor and Chairman _ _ _ _School of Medicine
>>> _ _ _ _ _ _ _ _ _ _ Department of Biostatistics _ Vanderbilt
>>> University

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