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Table 4 Overview systematic reviews without meta- analysis (n = 7)

From: An overview of systematic reviews on the collaboration between physicians and nurses and the impact on patient outcomes: what can we learn in primary care?

Intervention

Control

Outcome

Number of studies

Number of patients

Heterogeneity

Quality of evidence- risk of bias

Allen et al., 2014

Discharge protocol and advanced practice nurse

Usual care

- Length of hospital stay

- Length of time till re- hospitalization

- Costs

- Functional status

- Depression

- Patient satisfaction

- Quality of life

- GP satisfaction

5 (RCT)

918

Due to heterogeneity in the transitional care interventions and outcomes, data were not pooled.

Cochrane Collaboration’s tool – high risk of performance bias in the included research articles

General practitioner and primary care nurse models

Usual care

3 (RCT)

1949

Health Quality Ontario, 2013

Nurse and physician care

Physician care

- Hospitalizations

- Length of stay

- Mortality

- ED visits

- Specialist visits

- Health- related quality of life

- Patient satisfaction

- Disease specific measures

- Examination or medication prescribing

- Health- system efficiencies

- Number and length of primary health care visits

- Physician workload

6 (RCT)

Intervention:

1403

Control:1538

Due to clinical heterogeneity in the study populations evaluated, and differences in provider roles and characteristics, the pooling of outcomes was thought to be inappropriate and a meta- analysis was not conducted.

Quality of evidence: GRADE

Low- Moderate quality

Martin et al., 2010

Inter- professional collaboration – new models of care

Usual care

- Mortality

- Clinical outcomes

- Functional outcomes

- Social outcomes

- Utilization of medical services

- Patient- reported outcomes: quality of life, activities of daily living

14 (RCT)

Intervention: 2788

Control: 2563

NAV

NAV

Newhouse et al., 2011

Nurse practitioner/clinical nurse specialist care groups

Care management exclusively by physicians

- Patient satisfaction

- Self- reported perceived health

- Functional status

- Glucose control

- Lipid control

- Blood pressure

- ED visits

- Hospitalizations

- Duration of mechanical ventilation

- Length of stay

- Mortality

- Cost

- Complications

69: 20 (RCT) + 49 (obser- vational)

NAV

Effect sizes were not calculated for the multiple outcomes. Because of the widely varying populations, definitions, time periods, and study designs. Also, the publications did not consistently include the necessary data to calculate effect size.

Quality assessment by the Jadad scale

46 articles: High quality

12 articles:

Low quality

Renders et al., 2000

Interventions targeted at health care professionals or the structure in which health care professionals deliver their care. A more enhanced nursing role.

Usual care

- Glycemic control

- Micro- or macro- vascular complications

- Cardiovascular risk factors

- Hospital admissions

- Mortality

- Well- being

- Perceived health

- Quality of life

- Functional status

- Patient satisfaction

41:

27 (RCT) + 12 (CBA) + 2 (ITS)

48,598

Given the likely heterogeneity of interventions, there is decided a priori not to use meta- analysis to pool the results of studies.

Differences in guidelines and also in methods and reference values to assess glycated hemoglobin meant that a uniform effect size could not be valued and presented, thereby hindering between- study comparisons.

The quality criteria applied to RCT’s, CBAs and ITS are described in detail in the EPOC module of the Cochrane library.

Allocation concealment: 17 articles clearly concealed

Blind outcome assessment:

20 articles adequate 16 articles partly adequate

Reliable outcome assessment:

22 articles adequate

Smith et al., 2014

Participation of APRNs/PAs in providing cancer screening and prevention recommendations in primary care settings

Cancer screening and prevention provider teams with physicians that do not include APRNs/PAs

- Cervical cancer (Pap test)

- Breast cancer (Mammogram)

- Colorectal cancer

- Smoking cessation

- Diet

- Physical activity

15:

3 intervention studies +12 observational studies

NAV

NAV

NAV

Stalpers et al., 2015

Nurse- physician collaboration

Usual care

- Pressure ulcers

- Patient falls

- Pain management

29: 1 RCT + 28 observational studies

NAV

Fundamental problems with assessing and comparing data from primary studies prevents conducting an adequate quantitative meta- analysis of the literature.

Dutch version of Cochrane’s critical appraisal instrument: validity: moderate

reliability: moderate

applicability: moderate

  1. NAV ‘not available’, RCT ‘randomized controlled trial’, CBA ‘controlled before and after study’, ITS ‘interrupted time series’
  2. Table 4 presents the ‘collaboration intervention’, control, patient outcome, number of studies, number of patients (if available), a statement on heterogeneity (if available) and a measure of quality of evidence/risk of bias (if available) of seven included systematic reviews that did not conduct a meta- analysis