Total functional, blinded handwriting/drawing and amplitude (action and posture) scores for essential tremor patients.   

Average score
(mean (SD))
FunctionalBlinded handwriting/ drawingPostural tremor amplitudeAction tremor amplitude
Pre-op13.4 (1.8)6.3 (0.7)3.0 (0.3)3.5 (0.2)
Post-op 3 months4.7 (1.5)2.8 (0.4)0.7 (0.4)0.6 (0.4)
Post-op 1 year4.5 (1.3)2.9 (0.3)0.9 0.4)0.6 (0.4)
Significance:
 Pre-opv 3 monthsp < 0.001p < 0.001p < 0.05p < 0.05
 Post-opv 1 yearp < 0.001p < 0.001p < 0.05P < 0.05