A new comprehensive Cochrane review indicates that healthcare services provided by nurses generally yield outcomes comparable to those delivered by doctors, with potential improvements observed in specific areas under nurse-led care. The review synthesized findings from 82 studies worldwide, examining various patient outcomes, care processes, and economic implications.
Nurse-led healthcare services are largely comparable to doctor-led care, with potential for improvements in specific patient outcomes.
Review Scope and Methodology
The Cochrane review analyzed 82 randomized studies involving over 28,000 patients across 20 countries. These studies, predominantly from high-income countries (with 39% originating from the United Kingdom), typically lasted 12 months, with some extending up to five years. The assessment focused on nurse-doctor substitution in both inpatient units and outpatient clinics.
Nurse roles included advanced nurse practitioners, clinical nurse specialists, and registered nurses. These professionals performed tasks traditionally associated with doctors, such as patient history, physical examinations, test ordering, medication prescribing, and patient education.
The review contextualized nurse-doctor substitution within broader healthcare system pressures. These pressures include aging populations, the prevalence of chronic diseases, high workloads, expensive treatments, and doctor shortages. The aim of such substitution is often to improve access to care while managing costs.
Key Findings on Patient Outcomes
Overall Comparability
The review found little to no significant difference between nurse-led and doctor-led care concerning critical outcomes.
Patient mortality, quality of life, self-efficacy, and patient safety events showed no significant difference between nurse-led and doctor-led care.
Areas of Nurse-Led Advantage
However, nurses demonstrated potentially better outcomes in specific areas, including:
- Diabetes control
- Cancer follow-up
- Dermatology
- Eczema management
- Physical and psychological function
These potential improvements were observed particularly when nurses provided care in nurse-led clinics and inpatient settings. Doctor-led care showed slightly better performance in a few sexual health and medical abortion follow-up services.
Practitioner Insights and Performance
Specialist nurses were also associated with fewer patient safety events compared to other nurse grades. Regarding practitioner performance, nurse-led care may result in slight improvements in areas such as patient assessment, adherence to recommendations, medication management, polyp identification, and procedure start times. Practitioner performance might be better in high-income countries, while for patients with cardiovascular disease, nurse-led clinics showed potential improvements.
Professor Michelle Butler of Dublin City University noted that these findings suggest nurse-led services offer care as safe and effective as doctor-led services for many patients, with some experiencing improved outcomes.
Contextual Factors and Economic Implications
The models of nurse-doctor substitution varied widely, including autonomous operation, supervised care, or adherence to specialized protocols. These variations, alongside differences in training and responsibility levels, may influence outcomes. Factors potentially contributing to improved patient outcomes in nurse-led care included earlier, more frequent, or on-demand appointments, and additional educational components. However, the review also indicated that additional training and level of responsibility did not show significant differences across all outcomes.
Costs: A Mixed Picture
Evidence concerning direct costs was limited and inconsistent. While 17 studies reported reduced costs for nurse-led care, nine indicated higher costs. Potential reasons for higher costs included longer consultations, referrals, or variations in prescription practices. Overall, the effect on direct costs remains unclear.
Future Directions and Policy Considerations
The review highlighted that nurse-doctor substitution is not a universal solution and requires appropriate training, support, and care models to be effective.
Timothy Schultz from Flinders Health and Medical Research Institute emphasized that patients are not disadvantaged and can benefit significantly when these services are well-implemented.
Expanding nurse-led services could assist in addressing doctor shortages; however, policymakers are advised to consider the implications for the nursing workforce, including necessary training and organizational structures.
Gaps in Evidence and Research Needs
Researchers identified several gaps in the current evidence, advocating for:
- More studies across diverse specialties, nurse roles, and patient types.
- Improved consistency in outcome measurement.
- Increased research in low- and middle-income countries, where nurse-led roles could particularly enhance access to care amidst doctor shortages.
Confidence in Findings
The confidence in the evidence is moderate to low due to variations in participants, interventions, and outcome measurements, alongside a limited number of studies from low- and middle-income countries. The evidence included in this review is current as of June 25, 2024.