title: Assessment of grouping variable should have been blind in trial of dementia.
authors: P E
authors: PE
authors: Voutilainen
mesh_terms: D003704:Dementia / Q000150:complications / Q000175:diagnosis*; D006620:Hip Fractures / Q000523:psychology / Q000534:rehabilitation; D006801:Humans; D016032:Randomized Controlled Trials as Topic; D012107:Research Design; D013997:Time Factors