This dataset was taken from the list of OpenIntro dataset files found at https://www.openintro.org/data/.

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mtl

The data are from a convenience sample of 25 women and 10 men who weremiddle-aged or older. The purpose of the study was to understand therelationship between sedentary behavior and thickness of the medial temporallobe (MTL) in the brain.

Variables

• subject - ID for the individual.
• sex - Gender, which takes values F (female) or M (male).
• ethnic - Ethnicity, simplified to Caucasian and Other.
• educ - Years of educational.
• e4grp - APOE-4 status, taking a value of E4 or Non-E4.
• age - Age, in years.
• mmse - Score from the Mini-Mental State Examination, which is a global cognitition evaluation.
• ham_d - Score on the Hamilton Rating Scale for depression.
• ham_a - Score on the Hamilton Rating Scale for anxiety.
• dig_sym - We (the authors of this R package) are unsure as to the meaning of this variable.
• delay_vp - We (the authors of this R package) are unsure as to the meaning of this variable.
• bfr_selective_reminding_delayed - We (the authors of this R package) are unsure as to the meaning of this variable.
• sitting - Self-reported time sitting per day, averaged to the nearest hour.
• met_minwk - Metabolic equivalent units score (activity level). A score of 0 means "no activity" while 3000 is considered "high activity".
• ipaq_grp - Classification of METminwk into Low or High.
• aca1 - Thickness of the CA1 subregion of the MTL.
• aca23dg - Thickness of the CA23DG subregion of the MTL.
• ae_cort - Thickness of a subregion of the MTL.
• a_fusi_cort - Thickness of the fusiform gyrus subregion of the MTL.
• a_ph_cort - Thickness of the perirhinal cortex subregion of the MTL.
• a_pe_cort - Thickness of the entorhinal cortex subregion of the MTL.
• asubic - Thickness of the subiculum subregion of the MTL.
• total - Total MTL thickness.

Source

Siddarth P, Burggren AC, Eyre HA, Small GW, Merrill DA. 2018.Sedentary behavior associated with reduced medial temporal lobe thickness inmiddle-aged and older adults. PLoS ONE 13(4): e0195549.https://doi.org/10.1371/journal.pone.0195549Thank you to Professor Silas Bergen of Winona State University for pointingus to this data set!

Taken from: https://www.openintro.org/data/index.php?data=mtl.