| Converted to machine-readable form by Brian Frasca (6/14/94). | Removed attributes, 3, 25, 26, 27, and 28, and used | attribute 24 for class as suggested by Holte. | | 1. TItle: Horse Colic database | | 2. Source Information | -- Creators: Mary McLeish & Matt Cecile | Department of Computer Science | University of Guelph | Guelph, Ontario, Canada N1G 2W1 | mdmcleish@water.waterloo.edu | -- Donor: Will Taylor (taylor@pluto.arc.nasa.gov) | -- Date: 8/6/89 | | 3. Past Usage: | -- Unknown | | 4. Relevant Information: | | -- 2 data files | -- horse-colic.data: 300 training instances | -- horse-colic.test: 68 test instances | -- Possible class attributes: 24 (whether lesion is surgical) | -- others include: 23, 25, 26, and 27 | -- Many Data types: (continuous, discrete, and nominal) | | 5. Number of Instances: 368 (300 for training, 68 for testing) | | 6. Number of attributes: 28 | | 7. Attribute Information: | | 1: surgery? | 1 = Yes, it had surgery | 2 = It was treated without surgery | | 2: Age | 1 = Adult horse | 2 = Young (< 6 months) | | 3: Hospital Number | - numeric id | - the case number assigned to the horse | (may not be unique if the horse is treated > 1 time) | | 4: rectal temperature | - linear | - 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 | 5: pulse | - linear | - 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 | | 6: respiratory rate | - linear | - normal rate is 8 to 10 | - usefulness is doubtful due to the great fluctuations | | 7: 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. | | 8: 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 | | 9: 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 | | 10: capillary refill time | - a clinical judgement. The longer the refill, the poorer the | circulation | - possible values | 1 = < 3 seconds | 2 = >= 3 seconds | | 11: 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 | | 12: 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 | | 13: 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 | | 14: 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 | | 15: 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 | | 16: nasogastric reflux PH | - linear | - scale is from 0 to 14 with 7 being neutral | - normal values are in the 3 to 4 range | | 17: rectal examination - feces | - possible values | 1 = normal | 2 = increased | 3 = decreased | 4 = absent | - absent feces probably indicates an obstruction | | 18: 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 | | 19: packed cell volume | - linear | - 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. | | 20: total protein | - linear | - normal values lie in the 6-7.5 (gms/dL) range | - the higher the value the greater the dehydration | | 21: 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 | | 22: abdomcentesis total protein | - linear | - the higher the level of protein the more likely it is to have a | compromised gut. Values are in gms/dL | | 23: outcome | - what eventually happened to the horse? | - possible values: | 1 = lived | 2 = died | 3 = was euthanized | | 24: 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 | | 25, 26, 27: 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 | 28: 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 | | 8. Missing values: 30% of the values are missing 1, 2. | surgical lesion surgery: 1, 2. Age: 1, 9. | .data file has "9" instead of "2" rectal temperature: continuous. pulse: continuous. respiratory rate: continuous. temperature of extremities: 1, 2, 3, 4. peripheral pulse: 1, 2, 3, 4. mucous membranes: 1, 2, 3, 4, 5, 6. capillary refill time: 1, 2, 3. | .data file has "3" also pain: 1, 2, 3, 4, 5. peristalsis: 1, 2, 3, 4. abdominal distension: 1, 2, 3, 4. nasogastric tube: 1, 2, 3. nasogastric reflux: 1, 2, 3. nasogastric reflux PH: continuous. rectal examination: 1, 2, 3, 4. abdomen: 1, 2, 3, 4, 5. packed cell volume: continuous. total protein: continuous. abdominocentesis appearance: 1, 2, 3. abdomcentesis total protein: continuous. outcome: 1, 2, 3.