Pharmacist services for non-hospitalised patients

Micheal de Barra, Claire L. Scott, Neil W. Scott, Marie Johnston, Marijn de Bruin, Nancy Nkansah, Christine M. Bond, Catriona I. Matheson, Pamela Rackow, A. Jessica Williams, Margaret C. Watson

Research output: Contribution to journalReview articlepeer-review

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This review focuses on non‐dispensing services from pharmacists, i.e. pharmacists in community, primary or ambulatory‐care settings, to non‐hospitalised patients, and is an update of a previously‐published Cochrane Review.

To examine the effect of pharmacists' non‐dispensing services on non‐hospitalised patient outcomes.

Search methods
We searched CENTRAL, MEDLINE, Embase, two other databases and two trial registers in March 2015, together with reference checking and contact with study authors to identify additional studies. We included non‐English language publications. We ran top‐up searches in January 2018 and have added potentially eligible studies to 'Studies awaiting classification'.

Selection criteria
Randomised trials of pharmacist services compared with the delivery of usual care or equivalent/similar services with the same objective delivered by other health professionals.

Data collection and analysis
We used standard methodological procedures of Cochrane and the Effective Practice and Organisation of Care Group. Two review authors independently checked studies for inclusion, extracted data and assessed risks of bias. We evaluated the overall certainty of evidence using GRADE.

Main results
We included 116 trials comprising 111 trials (39,729 participants) comparing pharmacist interventions with usual care and five trials (2122 participants) comparing pharmacist services with services from other healthcare professionals. Of the 116 trials, 76 were included in meta‐analyses. The 40 remaining trials were not included in the meta‐analyses because they each reported unique outcome measures which could not be combined. Most trials targeted chronic conditions and were conducted in a range of settings, mostly community pharmacies and hospital outpatient clinics, and were mainly but not exclusively conducted in high‐income countries. Most trials had a low risk of reporting bias and about 25%‐30% were at high risk of bias for performance, detection, and attrition. Selection bias was unclear for about half of the included studies.

Compared with usual care, we are uncertain whether pharmacist services reduce the percentage of patients outside the glycated haemoglobin target range (5 trials, N = 558, odds ratio (OR) 0.29, 95% confidence interval (CI) 0.04 to 2.22; very low‐certainty evidence). Pharmacist services may reduce the percentage of patients whose blood pressure is outside the target range (18 trials, N = 4107, OR 0.40, 95% CI 0.29 to 0.55; low‐certainty evidence) and probably lead to little or no difference in hospital attendance or admissions (14 trials, N = 3631, OR 0.85, 95% CI 0.65 to 1.11; moderate‐certainty evidence). Pharmacist services may make little or no difference to adverse drug effects (3 trials, N = 590, OR 1.65, 95% CI 0.84 to 3.24) and may slightly improve physical functioning (7 trials, N = 1329, mean difference (MD) 5.84, 95% CI 1.21 to 10.48; low‐certainty evidence). Pharmacist services may make little or no difference to mortality (9 trials, N = 1980, OR 0.79, 95% CI 0.56 to 1.12, low‐certaintly evidence).

Of the five studies that compared services delivered by pharmacists with other health professionals, no studies evaluated the impact of the intervention on the percentage of patients outside blood pressure or glycated haemoglobin target range, hospital attendance and admission, adverse drug effects, or physical functioning.

Authors' conclusions
The results demonstrate that pharmacist services have varying effects on patient outcomes compared with usual care. We found no studies comparing services delivered by pharmacists with other healthcare professionals that evaluated the impact of the intervention on the six main outcome measures. The results need to be interpreted cautiously because there was major heterogeneity in study populations, types of interventions delivered and reported outcomes.There was considerable heterogeneity within many of the meta‐analyses, as well as considerable variation in the risks of bias.
Original languageEnglish
Article numberCD013102
Number of pages224
JournalCochrane Database of Systematic Reviews
Issue number9
Publication statusPublished - 4 Sept 2018

Bibliographical note

We are very grateful to the Chief Scientist Office, Scottish Government, for funding this review (CZH/4/1041). The authors wish to thank the members of Cochrane Effective Practice and Organisation of Care (EPOC) Group who supported this review, particularly Ms Tamara Rader and Mr Paul Miller for conducting the searches, and Ms Julia Worswick for her continued and good‐natured assistance throughout the update. We are very grateful to Dr Imran Omar for providing additional technical support. We thank Ms Caroline Burnett, Ms Andrea Fraser, Mrs Bev Smith and Ms Lynn McKenzie for their administrative and clerical support of this review.

We thank the referees whose comments improved the reporting and interpretation of this review. These include:

External referees: Yoon K Loke; Newton Opiyo; Internal editor: Carmel Hughes; Statistical editor: Sofia Massa; Contact editor: Gillian Leng; Managing editor: Daniela Gonçalves‐Bradley

We also thank National Institute for Health Research, via Cochrane Infrastructure funding to the EPOC Group. The views and opinions expressed therein are those of the authors and do not necessarily reflect those of the Systematic Reviews Programme, NIHR, NHS or the Department of Health.


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