mri: MRI data
In uwIntroStats: Descriptive Statistics, Inference, Regression, and Plotting in an Introductory Statistics Course
Description
An MRI data set hosted on Scott Emerson's webpage. More detailed description is hosted there, at “http://www.emersonstatistics.com/datasets/mri.pdf”.
Usage
1
Format
A data frame with 735 observations on the following 30 variables.
ptidparticipant identification number.
mridatethe date on which the participant underwent MRI scan in MMDDYY format.
ageparticipant age at time of MRI, in years.
maleindicator of whether participant is male (0=female, 1=male).
raceindicator of participant's race (1=white, 2=black, 3=Asian, 4=other).
weightparticipant's weight at time of MRI (pounds).
heightparticipant's height at time of MRI (centimeters).
packyrsparticipant smoking history in pack years (1 pack year = smoking 1 pack of cigarettes per day for 1 year). A participant who has never smoked has 0 pack years.
yrsquitnumber of years since quitting smoking. A current smoker will have a nonzero packyrs and a 0 for yrsquit. A never smoker will have a zero for both variables.
alcohaverage alcohol intake for the participant for the two weeks prior to MRI (drinks per week, where one drink is 1 oz. whiskey, 4 oz. wine, or 12 oz.beer).
physactphysical activity of the participant for the week prior to MRI (1,000 kcal).
chfindicator of whether the participant had been diagnosed with congestive heart failure prior to MRI (0=no, 1=yes).
chdindicator of whether the participant had been diagnosed with coronary heart disease prior to MRI (0=no, 1=diagnosis of angina, 2=diagnosis of myocardial infarction).
strokeindicator of whether the participant had been diagnosed with a cerebrovascular event prior to MRI (0=no, 1=diagnosis of a transient ischemic attack, 2=diagnosis of stroke).
diabetesindicator of whether the participant had been diagnosed with diabetes prior to MRI (0=no, 1=yes).
genhlthan indicator of the participant's view of their own health (1=excellent, 2=very good, 3=good, 4=fair, 5=poor)
ldla laboratory measure of low density lipoprotein (a kind of cholesterol) in the participant's blood at the time of MRI (mg/dL).
alba laboratory measure of albumin, a kind of protein, in the participant's blood at the time of MRI (g/L).
crta laboratory measure of creatinine, a waste product, in the participant's blood at the time of MRI (mg/dL).
plta laboratory measure of the number of platelets circulating in the participant's blood at the time of MRI (1000 per cubic mm).
sbpa measurement of the participant's systolic blood pressure in their arm at the time of MRI (mm Hg).
aaithe ratio of systolic blood pressure measured in the participant's ankle at time of MRI to the systolic blood pressure in the participant's arm.
feva measure of the forced expiratory volume in the participant at the time of MRI (L/sec).
dssta measure of cognitive function (Digit Symbol Substitution Test) for the participant at the time of MRI. Maximum score possible is 100.
atrophya measure of global brain activity detected on MRI. Measurements range from 0 to 100, with 100 being the most severe atrophy.
whgrda measure of white matter changes detected on MRI. 0 means no changes, 9 means marked changes.
numinfa count of the number of distinct regions identified on MRi scan which were suggestive of infarcts.
volinfa measure of the total volume of infarct-like lesions found on MRI scan (cubic cm).
obstimethe total time (in days) that the participant was observed on study between the date of MRI and death or September 16, 1997, whichever came first.
deathan indicator that the participant was observed to die while on study. If 1, the number of days recorded in obstime is the number of days from that participant's MRI to their death. If 0, the number of days in obstime is the number of days between that participant's MRI and September 16, 1997.
uwIntroStats documentation built on May 2, 2019, 4:34 a.m.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
Description
An MRI data set hosted on Scott Emerson's webpage. More detailed description is hosted there, at “http://www.emersonstatistics.com/datasets/mri.pdf”.
Usage
1 |
Format
A data frame with 735 observations on the following 30 variables.
ptidparticipant identification number.
mridatethe date on which the participant underwent MRI scan in MMDDYY format.
ageparticipant age at time of MRI, in years.
maleindicator of whether participant is male (0=female, 1=male).
raceindicator of participant's race (1=white, 2=black, 3=Asian, 4=other).
weightparticipant's weight at time of MRI (pounds).
heightparticipant's height at time of MRI (centimeters).
packyrsparticipant smoking history in pack years (1 pack year = smoking 1 pack of cigarettes per day for 1 year). A participant who has never smoked has 0 pack years.
yrsquitnumber of years since quitting smoking. A current smoker will have a nonzero packyrs and a 0 for yrsquit. A never smoker will have a zero for both variables.
alcohaverage alcohol intake for the participant for the two weeks prior to MRI (drinks per week, where one drink is 1 oz. whiskey, 4 oz. wine, or 12 oz.beer).
physactphysical activity of the participant for the week prior to MRI (1,000 kcal).
chfindicator of whether the participant had been diagnosed with congestive heart failure prior to MRI (0=no, 1=yes).
chdindicator of whether the participant had been diagnosed with coronary heart disease prior to MRI (0=no, 1=diagnosis of angina, 2=diagnosis of myocardial infarction).
strokeindicator of whether the participant had been diagnosed with a cerebrovascular event prior to MRI (0=no, 1=diagnosis of a transient ischemic attack, 2=diagnosis of stroke).
diabetesindicator of whether the participant had been diagnosed with diabetes prior to MRI (0=no, 1=yes).
genhlthan indicator of the participant's view of their own health (1=excellent, 2=very good, 3=good, 4=fair, 5=poor)
ldla laboratory measure of low density lipoprotein (a kind of cholesterol) in the participant's blood at the time of MRI (mg/dL).
alba laboratory measure of albumin, a kind of protein, in the participant's blood at the time of MRI (g/L).
crta laboratory measure of creatinine, a waste product, in the participant's blood at the time of MRI (mg/dL).
plta laboratory measure of the number of platelets circulating in the participant's blood at the time of MRI (1000 per cubic mm).
sbpa measurement of the participant's systolic blood pressure in their arm at the time of MRI (mm Hg).
aaithe ratio of systolic blood pressure measured in the participant's ankle at time of MRI to the systolic blood pressure in the participant's arm.
feva measure of the forced expiratory volume in the participant at the time of MRI (L/sec).
dssta measure of cognitive function (Digit Symbol Substitution Test) for the participant at the time of MRI. Maximum score possible is 100.
atrophya measure of global brain activity detected on MRI. Measurements range from 0 to 100, with 100 being the most severe atrophy.
whgrda measure of white matter changes detected on MRI. 0 means no changes, 9 means marked changes.
numinfa count of the number of distinct regions identified on MRi scan which were suggestive of infarcts.
volinfa measure of the total volume of infarct-like lesions found on MRI scan (cubic cm).
obstimethe total time (in days) that the participant was observed on study between the date of MRI and death or September 16, 1997, whichever came first.
deathan indicator that the participant was observed to die while on study. If 1, the number of days recorded in
obstimeis the number of days from that participant's MRI to their death. If 0, the number of days inobstimeis the number of days between that participant's MRI and September 16, 1997.
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
Embedding an R snippet on your website
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.