Assessment of grouping variable should have been blind in trial of dementia

BMJ 2001; 322 doi: https://doi.org/10.1136/bmj.322.7300.1491/b (Published 16 June 2001) Cite this as: BMJ 2001;322:1491
  1. Petri E Voutilainen, trialist (petri.voutilainen@tays.fi)
  1. Department of Cardiothoracic Surgery, FIN-33251 Tampere, Finland

    EDITOR—Huusko et al studied the effect of intensive geriatric rehabilitation on dementia patients with hip fracture.1 The reported study was probably the first randomised study with predetermined subgroup analysis according to the degree of dementia in this growing patient group. The degree of dementia was classified by the score on the minimental state examination.2 The median length of hospital stay of patients with hip fracture who had moderate dementia was 47 days …

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