The impact of a new emergency admission avoidance system for older people on length of stay and same-day discharges

Background: unplanned hospital admissions of older patients continue to attract the attention of UK policymakers, advisors and media. Reducing the number and length of stay (LOS) of these admissions has the potential to save NHS substantial costs while reducing iatrogenic risks. Some NHS trusts have introduced geriatric admission-avoidance systems, but evidence of their effectiveness is lacking. In September 2010, The Royal Free Hospital and Haverstock Healthcare Ltd, a GP provider organisation, introduced an admission-avoidance system for patients aged 70 or over: the Triage and Rapid Elderly Assessment Team (TREAT).

Objective: to measure the effect of TREAT on LOS and the rate of same-day discharges (an inverse measure of admission rate).

Setting: TREAT was based in the Accident and Emergency (A&E) department of the Royal Free Hospital, London.

Design: a pre- and post-retrospective cohort study comparing the 5,416 emergency geriatric admissions in the 12 months preceding the introduction of TREAT with the 5,370 emergency geriatric admissions in the 12 months following. Emergency geriatric admissions were divided into TREAT-matching and residual (non-matching) cohorts from hospital provider spell records, using the Healthcare Resource Group (HRG), treatment function and patient classification of the TREAT admissions. LOS and same-day discharge rates were measured over the pre- and post-TREAT periods: for the TREAT-matching cohort; for the residual cohort of emergency geriatric admissions; and for all emergency geriatric admissions.

Intervention: TREAT is a system of care combining early Accident and Emergency (A&E)-based senior doctor review, Comprehensive Geriatric Assessment (CGA), therapist assessment and supported discharge; post-discharge supported recovery; and a rapid access geriatric 'hot-clinic'. TREAT was supported by a post-acute care enablement (PACE) team, providing short-term nursing support immediately following discharge.

Results: TREAT accepted 593 geriatric admissions over a 12-month period, of which 32.04% were discharged on the day of admission. The mean LOS was 4.41 days, and the median LOS was 1 day. After the introduction of TREAT, mean LOS reduced by 18.16% (1.78 days, P < 0.001) for TREAT-matching admissions; by 11.65% (1.13 days, P < 0.001) for all emergency geriatric admissions; and by 1.08% (0.11 days, P = 0.065) for the residual population. Over the same period, the percentage of admissions resulting in same-day discharges increased from 12.26 to 16.23% (OR: 1.386, 95% CI: 1.203-1.597, P < 0.001) for TREAT-matching admissions, but for the residual population fell from 15.01 to 9.77% (OR: 0.613, P < 0.001, 95% CI: 0.737-0.509).

Conclusions: TREAT appears to have reduced avoidable emergency geriatric admissions, and to have shortened LOS for all emergency geriatric admissions. It aims to address the King's Fund's call for an 'overall system of care rather than lots of discrete processes' through 'better design and co-ordination of services following the needs of older people'. The ease of set-up lends itself to replication and testing in clinical and cost-effectiveness studies. Further studies are needed to measure the impact of TREAT on re-admission rates, patient outcomes and satisfaction.