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Table 2 Overview of clinical data of examined WC patients

From: Pathophysiology of writer’s cramp: an exploratory study on task-specificity and non-motor symptoms using an extended fine-motor testing battery

Biographical Variables
Age [years]
Sex
Main Musical Instrument, Instrumental Group strings, woodwind, none etc.
Musical Level professional, amateur, non-musician
Level of Education secondary modern school, grammar school final exams (comparable to UK A levels), vocational school, university degree
Previous Health Conditions
Affected Hand in patients and respective hand in controls
Handedness
Lifetime Cumulative Fine Motor Activity: Handwriting, Keyboard Typing, Instrumental Music, Other, Summed; all: [yrs] [years]
Psychological Questionnaires
State Train Anxiety Inventory: State Anxiety, Trait Anxiety
Arm Dystonia Disability Score
NEO-FFI
Motor Performance Tests
 Sub-Test Measure Right / Left / Bi-manual
 Aiming 1) error number
2) error duration [ms]
3) total duration [s]
R, L, BR, BL
 Steadiness 1) error number
2) duration [s]
R, L, BR, BL
 Line Tracking 1) error number
2) error duration [ms]
R, L
 Inserting of Long Pins total duration [s] R, L, BR, BL
 Inserting of Short Pins total duration [s] R, L, BR, BL
 Tapping 1) number of taps during first half of a 32 s recording
2) number of taps during second half
3) total number of taps
R, L, BR, BL
Writing Task
 Overall Writing Time [s]
 Frequency of the Written Trace [s−1]
 Mean Frequency of Up- and Downstrokes [s−1]
 Mean Axial Pressure on Pen [N]
 Writing Speed [mm/s]
 Length of Pen on Paper [mm]
Doodling Circles
 Minimum Axial Pressure on Pen [N]
 Difference of Minimum Axial Pressure while Doodling and Mean Axial Pressure during Writing Task [N]
Grip Force Tasks
 Maximum Grip Force (dystonic hand) [N]
 Maximum kinematic acceleration (dystonic hand) [N]
 Differential Load Force (dystonic hand) [N]
 Differential Grip Force (dystonic hand) [N]
 Mean Grip Force (dystonic hand) [N]
 Difference of mean Grip Force and Slip Force (dystonic hand) [N]
 Max Grip Force (non-dystonic hand) [N]
 Maximum kinematic acceleration (non-dystonic hand) [N]
 Differential Load Force (non-dystonic hand) [N]
 Differential Grip Force (non-dystonic hand) [N]
 Mean Grip Force (non-dystonic hand) [N]
 Difference of mean Grip Force and Slip Force (non-dystonic hand) [N]
 Grip force cyclic up-down Task (dystonic hand): min, max, mean and median [N]
 Grip force cyclic up-down Task (non-dystonic hand): min, max, mean and median [N]