DTI Variable Explanation
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VariableDescriptionNotes
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ID (optional)
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LifeDxPTSD or control - lifetime
For cases without structured clinical interview, provide diagnosis from self-report and indicate, PCL, PSS, or DTS and cutoff used.
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LifeSxSevProvide severity score - lifetime
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CurrentDxPTSD or control - current
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CurrentSxSevProvide severity score - current
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Dx scaleProvide source for Dx and SxSev
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ChildTraumaExp
Indicate 0, 1, or 2 where 0=no childhood trauma, 1=one type of trauma (e.g. physical abuse only), 2=two or more types of trauma
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CTscaleIndicate source such as CTQ, TLEQ, etc.
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AdultTraumaExpProvide adult trauma exposure scale
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ATscaleIndicate source such as TLEQ, CES, etc.
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TBIDid participant have TBI (1=yes, 0=no, NA=Not assessed, UNK=unknown)if TBI not assessed, can leave the next 3 columns blank
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NumTBINumber of TBIs sustained, or NA if unknown
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TBItypePlease indicate type of TBI, if known (blast, impact, penetrating, unknown)
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TBI_TimeSinceInjuryTime between TBI and scan, if known
Please use the following ranges: 0-2 months, 2-6 months, 6-18 months, 18 months-3 years, 3-10 years, >10 years
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MedicationIndicate if participant was on psychotropic medication and what type, if knownOptions are: antidep, antianx, antipsych, mood stabilizer, none, unknown
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AlcoholProvide score (0=none, 1=abuse, 2=dependence)
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Alcohol scaleIndicate source
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AgeAge in years at time of MRI scan
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SexM=male, F=female
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SiteIDIf your sample was collected at multiple sites, list the siteID that differentiates which scan was collected whereMost samples will put NA here
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ScannerManfIndicate scanner manufacturer
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FieldStrengthIndicate field strength (1.5T, 3T, etc)
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VoxelSizeIndicate voxel size of DTI acquisition
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NumGradientsIndicate number of diffusion weighted gradients
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BfactorIndicate the diffusion weighting
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NumB0sIndicate the number of B0s - images with no diffusion weighting
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FA_62 ENIGMA DTI roi averages - FA
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MD_62 ENIGMA DTI roi averages - MD
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RD_62 ENIGMA DTI roi averages - RD
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AD_62 ENIGMA DTI roi averages - AD
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