(Message inbox:6) Received: from charon.arc.nasa.gov by ICS.UCI.EDU id aa10794; 6 Aug 89 16:05 PDT Received: from HALEAKALA.arc.nasa.gov by CHARON.arc.nasa.gov via INTERNET with SMTP id 40376; 6 Aug 89 16:03:21 PDT Date: Sun, 6 Aug 89 16:06 PDT From: will taylor Subject: Horse Colic DB - 1 of 3 To: aha@ICS.UCI.EDU Message-ID: <19890806230616.2.TAYLOR@HALEAKALA.arc.nasa.gov> Source of database: - Mary McLeish & Matt Cecile Dept. of Computer Science U. of Guelph Guelph, Ontario, Canada N1G 2W1 mdmcleish@water.waterloo.edu ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; Date: Sat, 5 Aug 89 09:40:08 EDT From: mdmcleish@water.waterloo.edu Message-Id: <8908051340.AA29845@water.waterloo.edu> To: taylor@pluto.arc.nasa.gov HORSE COLIC DOMAIN: DESCRIPTION OF DATA ======================================= The data is supplied in two files. The first contains 300 horse colic cases that should be used for training data while the second contains 68 cases that can be used for testing the performance of your method. The variable that we have tended to try and predict is V24, that is, whether or not the lesion is surgical. Other variables of interest are outcome, V23, and lesion types, V25,V26,V27. The sample contains approx. 30% missing values (indicated by a zero in the data provided). You will need to deal with all types of variables (continuous, discrete, and nominal) as well as the missing values in your method. VARIABLES: ========== V1: surgery? 1 = Yes, it had surgery 2 = It was treated without surgery V2: Age 1 = Adult horse 2 = Young (< 6 months) V3: Hospital Number - the case number assigned to the horse (may not be unique if the horse is treated > 1 time) V4: rectal temperature - in degrees celsius. - An elevated temp may occur due to infection. - temperature may be reduced when the animal is in late shock - normal temp is 37.8 - this parameter will usually change as the problem progresses eg. may start out normal, then become elevated because of the lesion, passing back through the normal range as the horse goes into shock V5: pulse - the heart rate in beats per minute - is a reflection of the heart condition: 30 -40 is normal for adults - rare to have a lower than normal rate although athletic horses may have a rate of 20-25 - animals with painful lesions or suffering from circulatory shock may have an elevated heart rate V6: respiratory rate - normal rate is 8 to 10 - usefulness is doubtful due to the great fluctuations V7: temperature of extremities - a subjective indication of peripheral circulation - possible values: 1 = Normal 2 = Warm 3 = Cool 4 = Cold - cool to cold extremities indicate possible shock - hot extremities should correlate with an elevated rectal temp. V8: peripheral pulse - subjective - possible values are: 1 = normal 2 = increased 3 = reduced 4 = absent - normal or increased p.p. are indicative of adequate circulation while reduced or absent indicate poor perfusion V9: mucous membranes - a subjective measurement of colour - possible values are: 1 = normal pink 2 = bright pink 3 = pale pink 4 = pale cyanotic 5 = bright red / injected 6 = dark cyanotic - 1 and 2 probably indicate a normal or slightly increased circulation - 3 may occur in early shock - 4 and 6 are indicative of serious circulatory compromise - 5 is more indicative of a septicemia V10: capillary refill time - a clinical judgement. The longer the refill, the poorer the circulation - possible values 1 = < 3 seconds 2 = >= 3 seconds V11: pain - a subjective judgement of the horse's pain level - possible values: 1 = alert, no pain 2 = depressed 3 = intermittent mild pain 4 = intermittent severe pain 5 = continuous severe pain - should NOT be treated as a ordered or discrete variable! - In general, the more painful, the more likely it is to require surgery - prior treatment of pain may mask the pain level to some extent V12: peristalsis - an indication of the activity in the horse's gut. As the gut becomes more distended or the horse becomes more toxic, the activity decreases - possible values: 1 = hypermotile 2 = normal 3 = hypomotile 4 = absent V13: abdominal distension - An IMPORTANT parameter. - possible values 1 = none 2 = slight 3 = moderate 4 = severe - an animal with abdominal distension is likely to be painful and have reduced gut motility. - a horse with severe abdominal distension is likely to require surgery just tio relieve the pressure V14: nasogastric tube - this refers to any gas coming out of the tube - possible values: 1 = none 2 = slight 3 = significant - a large gas cap in the stomach is likely to give the horse discomfort V15: nasogastric reflux - possible values 1 = none 2 = > 1 liter 3 = < 1 liter - the greater amount of reflux, the more likelihood that there is some serious obstruction to the fluid passage from the rest of the intestine V16: nasogastric reflux PH - scale is from 0 to 14 with 7 being neutral - normal values are in the 3 to 4 range V17: rectal examination - feces - possible values 1 = normal 2 = increased 3 = decreased 4 = absent - absent feces probably indicates an obstruction V18: abdomen - possible values 1 = normal 2 = other 3 = firm feces in the large intestine 4 = distended small intestine 5 = distended large intestine - 3 is probably an obstruction caused by a mechanical impaction and is normally treated medically - 4 and 5 indicate a surgical lesion V19: packed cell volume - the # of red cells by volume in the blood - normal range is 30 to 50. The level rises as the circulation becomes compromised or as the animal becomes dehydrated. V20: total protein - normal values lie in the 6-7.5 (gms/dL) range - the higher the value the greater the dehydration V21: abdominocentesis appearance - a needle is put in the horse's abdomen and fluid is obtained from the abdominal cavity - possible values: 1 = clear 2 = cloudy 3 = serosanguinous - normal fluid is clear while cloudy or serosanguinous indicates a compromised gut V22: abdomcentesis total protein - the higher the level of protein the more likely it is to have a compromised gut. Values are in gms/dL V23: outcome - what eventually happened to the horse? - possible values: 1 = lived 2 = died 3 = was euthanized V24: surgical lesion? - retrospectively, was the problem (lesion) surgical? - all cases are either operated upon or autopsied so that this value and the lesion type are always known - possible values: 1 = Yes 2 = No V25,V26,V27: type of lesion - first number is site of lesion 1 = gastric 2 = sm intestine 3 = lg colon 4 = lg colon and cecum 5 = cecum 6 = transverse colon 7 = retum/descending colon 8 = uterus 9 = bladder 11 = all intestinal sites 00 = none - second number is type 1 = simple 2 = strangulation 3 = inflammation 4 = other - third number is subtype 1 = mechanical 2 = paralytic 0 = n/a - fourth number is specific code 1 = obturation 2 = intrinsic 3 = extrinsic 4 = adynamic 5 = volvulus/torsion 6 = intussuption 7 = thromboembolic 8 = hernia 9 = lipoma/slenic incarceration 10 = displacement 0 = n/a V28: cp_data - is pathology data present for this case? 1 = Yes 2 = No - this variable is of no significance since pathology data is not included or collected for these cases ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;