[Testing of interventions for prevention of heat wave related deaths: results among frail elderly and methodological problems].

Objective: to evaluate the impact of a programme based on soft home care services and an offer of social caretaking, compared to one based only on soft home care, for the prevention of heat-related health events among clinically and/or functionally frail elderly.

Design: cluster randomised controlled trial.

Setting And Participants: the study population included 2,612 persons over 75 years of age living alone in the city of Turin, North-West Italy, who were classified as clinically (hospitalization with specific diagnoses before summer 2004) and/or functionally (were receiving a disability pension) frail.