The purpose of this study is to estimate the prevalence of abnormal serum levels of vitamin B6, and the associations of those levels with demographic and clinical variables in a randomly selected sample of people living with Parkinson's disease, compared to historical controls.
Study Type
OBSERVATIONAL
Enrollment
288
Movement Disorders Clinic, University of Rochester Medical Center
Rochester, New York, United States
Serum levels of vitamin B6 (Fasting)
nmol/L (log-transformed)
Time frame: At enrollment
Age
Years
Time frame: At enrollment
Sex
Female/Male
Time frame: At enrollment
Race
As defined by the U.S. Office of Management and Budget: American Indian or Alaska Native, Asian, Black or African American, Native Hawaiian or Other Pacific Islander, White
Time frame: At enrollment
Ethnicity
As defined by the U.S. Office of Management and Budget: Hispanic or Latino, non-Hispanic or Latino
Time frame: At enrollment
Body mass index
kg/m2
Time frame: At enrollment
Diabetes
Yes/No
Time frame: At enrollment
Smoking
Yes/No
Time frame: At enrollment
Alcohol use
Yes/No
Time frame: At enrollment
Daily consumption of protein in the last 30 days
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.
Yes/No
Time frame: At enrollment
Daily consumption of food rich in B6 in the last 30 days
Yes/No
Time frame: At enrollment
Food insecurity
Yes/No
Time frame: At enrollment
Vitamin B6 supplement use in the last 30 days
Yes/No
Time frame: At enrollment
Vitamin supplement use in the last 30 days
Yes/No
Time frame: At enrollment
History of oral contraceptive pill use
Yes/No
Time frame: At enrollment
Age at onset of Parkinson's disease
Years
Time frame: At enrollment
Disease duration
Years
Time frame: At enrollment
Disease stage
Hoehn and Yahr scale
Time frame: At enrollment
Disease severity
Movement Disorders Society sponsored revision of the Unified Parkinson Disease Rating Scale (MDS-UPDRS): Total, Part I, Part II, Part III, and Part IV
Time frame: At enrollment
Levodopa dosage
mg/day
Time frame: At enrollment
Dosage of dopa decarboxylase inhibitor
mg/day
Time frame: At enrollment
Levodopa/Carbidopa ratio
Time frame: At enrollment
Cathecol-o-methyl-transferase inhibitor use
Yes/No
Time frame: At enrollment
Dosage of cathecol-o-methyl-transferase inhibitor
mg/day
Time frame: At enrollment
Levodopa equivalent daily dosage
mg/day
Time frame: At enrollment
Polyneuropathy
modified Toronto Clinical Neuropathy Score
Time frame: At enrollment
Epilepsy
Yes/No
Time frame: At enrollment
Serum levels of vitamin B12 (Fasting)
pg/mL
Time frame: At enrollment
Serum levels of homocysteine (Fasting)
µmol/L
Time frame: At enrollment
Serum levels of methylmalonic acid (Fasting)
µmol/L
Time frame: At enrollment
Serum levels of folic acid (Fasting)
ng/mL
Time frame: At enrollment