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- 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
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