Table 4 Correlation between PIGD severity and HVA level in CSF from PIGD group.

From: Phenotype of postural instability/gait difficulty in Parkinson disease: relevance to cognitive impairment and mechanism relating pathological proteins and neurotransmitters

PIGD severity (points) R P value
HVA in CSF (ng/mL) −0.575 0.016*
  1. HVA = homovanillic acid. *P < 0.05.