AD Alzheimer’s disease
AVLT Auditory Verbal Learning Test
B unstandardized regression coefficient
BHMT Betaine homocysteine methyltransferase
BMI Body mass index
BS Bariatric surgery
CBS Cystathionine β-synthase
CBTT Corsi Block Tapping Test
CNS Central nervous system
ECLIA Electro-chemiluminescence immunoassay
EWL Excess weight loss
GLP-1 Glucagon-like-peptide-1
GPB Gastric bypass
HCY Homocysteine
IGT Iowa Gambling Task
MCI Mild cognitive impairment
MHH Medizinische Hochschule Hannover
n.s. Not significant
PHQ Patient Health Questionnaire
PHQ-9 Patient Health Questionnaire Depression
Scale
PYY Postprandial plasma peptide YY
RAVLT Rey Auditory Verbal Learning Test
RYGB Roux-en-Y gastric bypass
SD Standard deviation
5-methyl-THF 5-methyltetrahydrofolate
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