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BMC Primary Care
Published in: BMC Primary Care 1/2017

Open Access 01-12-2017 | Research article

The effectiveness of a primary care nursing-led dietary intervention for prediabetes: a mixed methods pilot study

Authors: Kirsten J. Coppell, Sally L. Abel, Trish Freer, Andrew Gray, Kiri Sharp, Joanna K. Norton, Terrie Spedding, Lillian Ward, Lisa C. Whitehead

Published in: BMC Primary Care | Issue 1/2017

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Abstract

Background

Primary care nurse-led prediabetes interventions are seldom reported. We examined the implementation and feasibility of a 6-month multilevel primary care nurse-led prediabetes lifestyle intervention compared with current practice in patients with prediabetes, with weight and glycated haemoglobin (HbA1c) as outcomes.

Methods

This study used a convergent mixed methods design involving a 6-month pragmatic non-randomised pilot study with a qualitative process evaluation, and was conducted in two neighbouring provincial cities in New Zealand, with indigenous Māori populations comprising 18.2% and 23.0%, respectively. Participants were non-pregnant adults aged ≤ 70 years with newly diagnosed prediabetes (HbA1c 41-49 mmol/mol), body mass index (BMI) ≥ 25 kg/m2 and not prescribed Metformin. A structured dietary intervention tool delivered by primary care nurses with visits at baseline, 2–3 weeks, 3 months and 6 months was implemented in four intervention practices. Four control practices continued to provide usual care. Primary quantitative outcome measures were weight and HbA1c. Linear and quantile regression models were used to compare each outcome between the two groups at follow-up. Qualitative data included: observations of nurse training sessions and steering group meetings; document review; semi-structured interviews with a purposive sample of key informants (n = 17) and intervention patients (n = 20). Thematic analysis was used.

Results

One hundred fifty-seven patients with prediabetes enrolled (85 intervention, 72 control), 47.8% female and 31.2% Māori. Co-morbidities were common, particularly hypertension (49.7%), dyslipidaemia (40.1%) and gout (15.9%). Baseline and 6 month measures were available for 91% control and 79% intervention participants. After adjustment, the intervention group lost a mean 1.3 kg more than the control group (p < 0.001). Mean HbA1c, BMI and waist circumference decreased in the intervention group and increased in the control group, but differences were not statistically significant. Implementation fidelity was high, and it was feasible to implement the intervention in busy general practice settings. The intervention was highly acceptable to both patients and key stakeholders, especially primary care nurses.

Conclusions

Study findings confirm the feasibility and acceptability of primary care nurses providing structured dietary advice to patients with prediabetes in busy general practice settings. The small but potentially beneficial mean weight loss among the intervention group supports further investigation.

Trial Registration

ANZCTR ACTRN12615000806​561. Registered 3 August 2015 (Retrospectively registered).
Appendix
Available only for authorised users
Footnotes
1
Māori language word for extended family
 
2
a traditional Māori tribal meeting place
 
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Metadata
Title
The effectiveness of a primary care nursing-led dietary intervention for prediabetes: a mixed methods pilot study
Authors
Kirsten J. Coppell
Sally L. Abel
Trish Freer
Andrew Gray
Kiri Sharp
Joanna K. Norton
Terrie Spedding
Lillian Ward
Lisa C. Whitehead
Publication date
01-12-2017
Publisher
BioMed Central
Published in
BMC Primary Care / Issue 1/2017
Electronic ISSN: 2731-4553
DOI
https://doi.org/10.1186/s12875-017-0671-8

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