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Impact of the SIGN head injury guidelines and NHS 4-hour emergency target on hospital admissions for head injury in Scotland: an interrupted times series.

Abstract：

OBJECTIVES:Head injury is a common reason for emergency department (ED) attendance. Around 1% of patients have life-threatening injuries, while 80% of patients are discharged. National guidelines (Scottish Intercollegiate Guidelines Network (SIGN)) were introduced in Scotland with the aim of achieving early identification of those with acute intracranial lesions yet safely reducing hospital admissions.This study aims to assess the impact of these guidelines and any effect the national 4-hour ED performance target had on hospital admissions for head injury. SETTING:All Scottish hospitals between April 1998 and March 2016. PARTICIPANTS:Patients admitted to hospital for head injury or traumatic brain injury (TBI) diagnosed by CT imaging identified using administrative Scottish Information Services Division data. There are 275 hospitals in Scotland. In 2015/2016, there were 571 221 emergency hospital admissions in Scotland. INTERVENTIONS:The SIGN head injury guidelines introduced in 2000 and 2009. The 4-hour ED target introduced in 2004. OUTCOMES:The monthly rate of hospital admissions for head injury and traumatic brain injury. STUDY DESIGN:An interrupted time series analysis. RESULTS:The first guideline was associated with a reduction in monthly admissions of 0.14 (95% CI 0.09 to 4.83) per 100 000 population. The 4-hour target was associated with a monthly increase in admissions of 0.13 (95% CI 0.06 to 0.20) per 100 000 population. The second guideline reduced monthly admissions by 0.09 (95% CI-0.13 to -0.05) per 100 000 population. These effects varied between age groups.The guidelines were associated with increased admissions for patients with injuries identified by CT imaging-guideline 1: 0.06 (95% CI 0.004 to 0.12); guideline 2: 0.05 (95% CI 0.04 to 0.06) per 100 000 population. CONCLUSION:Increased CT imaging of head injured patients recommended by SIGN guidelines reduced hospital admissions. The 4-hour ED target and the increased identification of TBI by CT imaging acted to undermine this effect.

journal_name

BMJ Open

journal_title

BMJ open

authors

Marincowitz C,Lecky FE,Morris E,Allgar V,Sheldon TA

doi

10.1136/bmjopen-2018-022279

subject

Has Abstract

pub_date

2018-12-22 00:00:00

pages

e022279

issue

issn

2044-6055

pii

bmjopen-2018-022279

journal_volume

pub_type

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Impact of the SIGN head injury guidelines and NHS 4-hour emergency target on hospital admissions for head injury in Scotland: an interrupted times series.