GFAP and normal pressure hydrocephalus: Methods: The preoperative composition of t-tau, p-tau, β-amyloid, neurofilament (NFL) and glial fibrillary acidic protein (GFAP) in 88 shunted NPH-patients was analysed and correlated with motor functions [10-m-walk in steps (w10ms) and seconds (w10mt), timed-up and go test in seconds (TUGt) and steps (TUGs)] and Mini Mental State Examination (MMSE) before and 3 months postoperatively.