Fig. 1

Study population and analysed groups of combinations of rates per hospital of ‘acute geriatric care’ (AGC) and ‘transfers to subacute geriatric rehabilitation’ (TSR). # Rate of acute geriatric care (OPS 8–550): None: 0%; Medium: > 0 to ≤ 48.8%; High: > 48.8%. * Rate of transfers to subacute rehabilitation: Low: < 18.6%; Medium: 18.6 to 43.6%; High: > 43.6%