Total (n=20) With OH (n=9) Without OH (n=11) p
Tremor 13 (65%) 6 (66.6%) 7 (63.6%) p=0.88
Bradykinesia 20 (100%) 9 (100%) 11 (100%)  
Postural instability 5 (25%) 2 (22.2%) 3 (27.2%) p=0.79
Rigidity 20 (100%) 9 (100%) 11 (100%)  
Table 1: Comparison of the clinical manifestations of patients with and without OH at the time of the assessment.
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