Figure 1.

Derivation of the analytical samples from the PRO-AGE study: a randomised controlled trial of Health Risk Appraisal for older persons based in general practice*. *For further information on trial design see reference 13. HRA-O = Health Risk Appraisal for Older persons.

Biddulph et al. BMC Geriatrics 2014 14:5   doi:10.1186/1471-2318-14-5
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