The demographic composition of a general practice catchment area strongly influences recruitment efficiency, with each one percentage point increase in the proportion of residents aged 70 years or older associated with a 10% increase in the likelihood of a general practitioner successfully randomising at least one trial participant. This highlights the critical importance of aligning trial target demographics with local population age structures to optimize enrollment rates.

Regarding 'The demographic composition of a general practice catchment area strongly influences recruitment efficiency, with each one percentage point increase in the proportion of residents aged 70 years or older associated with a 10% increase in the likelihood of a general practitioner successfully randomising at least one trial participant. This highlights the critical importance of aligning trial target demographics with local population age structures to optimize enrollment rates.': The available evidence leans toward this being likely, but more research is needed for certainty.