Undertaking a randomised controlled trial in the police setting: methodological and practical challenges

Testing the Efficacy of a 1-Day Police Decision-Making and Autonomic Modulation Intervention: A Quasi-Random Pragmatic Controlled Trial

Contemporary discourse has identified several urgent priorities concerning police training and education, including: (a) empirically testing and validating the effectiveness of current programming in reducing lethal force decision-making errors; (b) integrating evidence-based content and pedagogical approaches into police curriculum; and (c) understanding the breadth and length of programming necessary to ensure learning and transfer of skills to operational field settings. Widespread calls to identify effective and actionable training programs have been met with numerous research studies, systematic reviews, and policy recommendations that reveal the need to train officers' internal physiological awareness, which is foundational in shaping cognitive decision-making, emotion regulation, and behavior under stressful conditions. Several investigations have shown improvements to both lethal force errors and physiological recovery following a multi-day autonomic modulation (AM) intervention. Immediate and sustained training gains are observed following repeated practice with clinically validated protocols integrated into training scenarios. Despite evidence-based support for AM in addressing the aforementioned priorities, police organizations are faced with limited time and funding for training and education. The goal of the current quasi-random pragmatic controlled trial was to evaluate the effectiveness of a modified 1-day version of an established AM intervention. A sample of active-duty police officers were quasi-randomly assigned to an AM intervention (n = 82) or waitlist control group (n = 105). Lethal force errors and objective measures of autonomic arousal and recovery were measured during reality-based scenarios pre- and post-training and at 12-month follow-up. In contrast to previous investigations of longer AM intervention protocols, no significant training-related improvements to behavioral or physiological outcomes were found immediately post-intervention or at follow-up. The current results suggest that single-day training is insufficient to learn the physiological awareness and regulation skills necessary to perform effectively during lethal force encounters, as demonstrated by a lack of immediate or sustained training effects. Practical considerations, such as resource allocation, that may undermine the effectiveness of implementing evidence-based police training are discussed.

Police-related triage interventions for mental health-related incidents: a rapid evidence synthesis

Background

Police officers are often the first responders to mental health-related incidents and, consequently, can become a common gateway to care. The volume of such calls is an increasing challenge.

Objective

What is the evidence base for models of police-related mental health triage (often referred to as ‘street triage’) interventions?

Design

Rapid evidence synthesis.

Participants

Individuals perceived to be experiencing mental ill health or in a mental health crisis.

Interventions

Police officers responding to calls involving individuals experiencing perceived mental ill health or a mental health crisis, in the absence of suspected criminality or a criminal charge.

Main outcome measures

Inclusion was not restricted by outcome.

Data sources

Eleven bibliographic databases (i.e. Applied Social Sciences Index and Abstracts, Criminal Justice Abstracts, EMBASE, MEDLINE, PAIS® Index, PsycINFO, Scopus, Social Care Online, Social Policy & Practice, Social Sciences Citation Index and Social Services Abstracts) and multiple online sources were searched for relevant systematic reviews and qualitative studies from inception to November 2017. Additional primary studies reporting quantitative data published from January 2016 were also sought.

Review methods

The three-part rapid evidence synthesis incorporated metasynthesis of the effects of street triage-type intervention models, rapid synthesis of UK-relevant qualitative evidence on implementation and the overall synthesis.

Results

Five systematic reviews, eight primary studies reporting quantitative data and eight primary studies reporting qualitative data were included. Most interventions involved police officers working in partnership with mental health professionals. These interventions were generally valued by staff and showed some positive effects on procedures (such as rates of detention) and resources, although these results were not entirely consistent and not all important outcomes were measured. Most of the evidence was at risk of multiple biases caused by design flaws and/or a lack of reporting of methods, which might affect the results.

Limitations

All primary research was conducted in England, so may not be generalisable to the whole of the UK. Discussion of health equity issues was largely absent from the evidence.

Conclusions

Most published evidence that aims to describe and evaluate various models of street triage interventions is limited in scope and methodologically weak. Several systematic reviews and recent studies have called for a prospective, comprehensive and streamlined collection of a wider variety of data to evaluate the impact of these interventions. This rapid evidence synthesis expands on these recommendations to outline detailed implications for research, which includes clearer articulation of the intervention’s objectives, measurement of quantitative outcomes beyond section 136 of the Mental Health Act 1983 [Great Britain. Mental Health Act 1983. Section 136. London: The Stationery Office; 1983 URL: www.legislation.gov.uk/ukpga/1983/20/section/136 (accessed October 2017)] (i.e. rates, places of safety and processing data) and outcomes that are most important to the police, mental health and social care services and service users. Evaluations should take into consideration shorter-, medium- and longer-term effects. Whenever possible, study designs should have an appropriate concurrent comparator, for example by comparing the pragmatic implementation of collaborative street triage models with models that emphasise specialist training of police officers. The collection of qualitative data should capture dissenting views as well as the views of advocates. Any future cost-effectiveness analysis of these interventions should evaluate the impact across police, health and social services.

Funding

The National Institute for Health Research Health Services and Delivery Research programme.

Alcohol Screening and Brief Intervention in Police Custody Suites: Pilot Cluster Randomised Controlled Trial (AcCePT)

Aims

There is a clear association between alcohol use and offending behaviour and significant police time is spent on alcohol-related incidents. This study aimed to test the feasibility of a trial of screening and brief intervention in police custody suites to reduce heavy drinking and re-offending behaviour.

Short summary

We achieved target recruitment and high brief intervention delivery if this occurred immediately after screening. Low rates of return for counselling and retention at follow-up were challenges for a definitive trial. Conversely, high consent rates for access to police data suggested at least some outcomes could be measured remotely.

Methods

A three-armed pilot Cluster Randomised Controlled Trial with an embedded qualitative interview-based process evaluation to explore acceptability issues in six police custody suites (north east and south west of the UK). Interventions included: 1. Screening only (Controls), 2. 10 min Brief Advice 3. Brief Advice plus 20 min of brief Counselling.

Results

Of 3330 arrestees approached: 2228 were eligible for screening (67%) and 720 consented (32%); 386 (54%) scored 8+ on AUDIT; and 205 (53%) were enroled (79 controls, 65 brief advice and 61 brief counselling). Follow-up rates at 6 and 12 months were 29% and 26%, respectively. However, routinely collected re-offending data were obtained for 193 (94%) participants. Indices of deprivation data were calculated for 184 (90%) participants; 37.6% of these resided in the 20% most deprived areas of UK. Qualitative data showed that all arrestees reported awareness that participation was voluntary, that the trial was separate from police work, and the majority said trial procedures were acceptable.

Conclusion

Despite hitting target recruitment and same-day brief intervention delivery, a future trial of alcohol screening and brief intervention in a police custody setting would only be feasible if routinely collected re-offending and health data were used for outcome measurement.

Trial registration

ISRCTN number: 89291046.