Diet and diabetes (ii): A controlled trial of problem solving to improve dietary self-management in patients with insulin dependent diabetes

Psychological interventions to improve self-management of type 1 and type 2 diabetes: a systematic review

BACKGROUND

For people with diabetes mellitus to achieve optimal glycaemic control, motivation to perform self-management is important. The research team wanted to determine whether or not psychological interventions are clinically effective and cost-effective in increasing self-management and improving glycaemic control.

OBJECTIVES

The first objective was to determine the clinical effectiveness of psychological interventions for people with type 1 diabetes mellitus and people with type 2 diabetes mellitus so that they have improved (1) glycated haemoglobin levels, (2) diabetes self-management and (3) quality of life, and fewer depressive symptoms. The second objective was to determine the cost-effectiveness of psychological interventions.

DATA SOURCES

The following databases were accessed (searches took place between 2003 and 2016): MEDLINE, Cumulative Index to Nursing and Allied Health Literature (CINAHL), Cochrane Library, PsycINFO, EMBASE, Cochrane Controlled Trials Register, Web of Science, and Dissertation Abstracts International. Diabetes conference abstracts, reference lists of included studies and Clinicaltrials.gov trial registry were also searched.

REVIEW METHODS

Systematic review, aggregate meta-analysis, network meta-analysis, individual patient data meta-analysis and cost-effectiveness modelling were all used. Risk of bias of randomised and non-randomised controlled trials was assessed using the Cochrane Handbook (Higgins JP, Altman DG, Gøtzsche PC, Jüni P, Moher D, Oxman AD, et al. The Cochrane Collaboration's tool for assessing risk of bias in randomised trials. BMJ 2011;343:d5928).

DESIGN

Systematic review, meta-analysis, cost-effectiveness analysis and patient and public consultation were all used.

SETTING

Settings in primary or secondary care were included.

PARTICIPANTS

Adolescents and children with type 1 diabetes mellitus and adults with types 1 and 2 diabetes mellitus were included.

INTERVENTIONS

The interventions used were psychological treatments, including and not restricted to cognitive-behavioural therapy, counselling, family therapy and psychotherapy.

MAIN OUTCOME MEASURES

Glycated haemoglobin levels, self-management behaviours, body mass index, blood pressure levels, depressive symptoms and quality of life were all used as outcome measures.

RESULTS

A total of 96 studies were included in the systematic review (n = 18,659 participants). In random-effects meta-analysis, data on glycated haemoglobin levels were available for seven studies conducted in adults with type 1 diabetes mellitus (n = 851 participants) that demonstrated a pooled mean difference of -0.13 (95% confidence interval -0.33 to 0.07), a non-significant decrease in favour of psychological treatment; 18 studies conducted in adolescents/children with type 1 diabetes mellitus (n = 2583 participants) that demonstrated a pooled mean difference of 0.00 (95% confidence interval -0.18 to 0.18), indicating no change; and 49 studies conducted in adults with type 2 diabetes mellitus (n = 12,009 participants) that demonstrated a pooled mean difference of -0.21 (95% confidence interval -0.31 to -0.10), equivalent to reduction in glycated haemoglobin levels of -0.33% or ≈3.5 mmol/mol. For type 2 diabetes mellitus, there was evidence that psychological interventions improved dietary behaviour and quality of life but not blood pressure, body mass index or depressive symptoms. The results of the network meta-analysis, which considers direct and indirect effects of multiple treatment comparisons, suggest that, for adults with type 1 diabetes mellitus (7 studies; 968 participants), attention control and cognitive-behavioural therapy are clinically effective and cognitive-behavioural therapy is cost-effective. For adults with type 2 diabetes mellitus (49 studies; 12,409 participants), cognitive-behavioural therapy and counselling are effective and cognitive-behavioural therapy is potentially cost-effective. The results of the individual patient data meta-analysis for adolescents/children with type 1 diabetes mellitus (9 studies; 1392 participants) suggest that there were main effects for age and diabetes duration. For adults with type 2 diabetes mellitus (19 studies; 3639 participants), baseline glycated haemoglobin levels moderated treatment outcome.

LIMITATIONS

Aggregate meta-analysis was limited to glycaemic control for type 1 diabetes mellitus. It was not possible to model cost-effectiveness for adolescents/children with type 1 diabetes mellitus and modelling for type 2 diabetes mellitus involved substantial uncertainty. The individual patient data meta-analysis included only 40-50% of studies.

CONCLUSIONS

This review suggests that psychological treatments offer minimal clinical benefit in improving glycated haemoglobin levels for adults with type 2 diabetes mellitus. However, there was no evidence of benefit compared with control interventions in improving glycated haemoglobin levels for people with type 1 diabetes mellitus.

FUTURE WORK

Future work should consider the competency of the interventionists delivering a therapy and psychological approaches that are matched to a person and their life course.

STUDY REGISTRATION

This study is registered as PROSPERO CRD42016033619.

FUNDING

This project was funded by the National Institute for Health Research (NIHR) Health Technology Assessment programme and will be published in full in Health Technology Assessment; Vol. 24, No. 28. See the NIHR Journals Library website for further project information.

Problem solving in diabetes self-management and control: a systematic review of the literature

PURPOSE

The purpose of this systematic review is to assess the published literature on problem solving and its associations with diabetes self-management and control, as the state of evidence exists.

DATA SOURCES

PubMed, PsychINFO, and ERIC electronic databases were searched for the years 1990 to the present and for English-language articles, and reference lists from included studies were reviewed to capture additional studies.

STUDY SELECTION

Quantitative and qualitative studies that addressed problem solving as a process or strategy for diabetes self-management were included. Fifty-two studies met the criteria for inclusion.

DATA EXTRACTION

Study design, sample characteristics, measures, and results were reviewed.

DATA SYNTHESIS

Thirty-six studies were quantitative; 16 were conceptual or qualitative. Studies were classified as addressing the problem-solving definition/framework, assessment, intervention, or health care professional issues.

CONCLUSIONS

Problem solving is a multidimensional construct encompassing verbal reasoning/rational problem solving, quantitative problem solving, and coping. Aspects of problem solving can be assessed using newly developed diabetes-specific problem-solving measures for children/adolescents and adults. Cross-sectional studies in adults, but not children/adolescents, provide consistent evidence of associations between problem solving and A1C level. Only 25% of problem-solving intervention studies with children/adolescents and 50% of interventions with adults reported improvement in A1C. Most intervention studies reported an improvement in behaviors, most commonly global adherence in children/adolescents and dietary behavior in adults. Methodological limitations (noninclusion of problem-solving measures, inadequate descriptions of problem-solving interventions, homogenous samples) need to be addressed in future research to clarify the effect of problem solving on diabetes outcomes, identify characteristics of effective interventions, and determine the utility across age and racial/ethnic groups.

Diabetes and healthy eating: a systematic review of the literature

PURPOSE

The purpose of this study is to review the literature on healthy eating interventions within diabetes care.

DATA SOURCES

The databases PubMed, Cumulative Index to Nursing and Allied Health Literature, and PsycINFO were searched for the terms healthy eating or dietary and intervention and diabetes in the abstracts. In addition, electronic searches of the contents of Diabetes, Clinical Diabetes, Diabetes Care, Diabetes Spectrum, and Diabetic Medicine were conducted.

STUDY SELECTION

Articles were included in the review if the participants were diagnosed with type 1 or type 2 diabetes, results from an intervention to promote dietary change were reported, measurements were taken from 2 time points (preintervention and postintervention), at least 1 outcome measured eating behavior, and the articles had been published between 1990 and the present date.

DATA EXTRACTION

Data were extracted from the 23 studies found to be eligible. Studies were compared in terms of sample types and sizes, duration, and type and content of intervention.

DATA SYNTHESIS

Comparisons were made between the characteristics of those studies that produced a statistically significant result and those that did not, for the different outcome measures.

CONCLUSIONS

For studies measuring the outcomes of weight, fat intake, saturated fat intake, and carbohydrates, there was a tendency for successful interventions to include an exercise dimension and group work. Some outcomes had a tendency to show significant changes in studies of longer duration (eg, serum cholesterol), whereas others were more likely to show significant changes in studies of shorter duration (eg, weight, fiber), suggesting that certain outcomes may be more difficult to maintain. Future research would benefit by ensuring that sample sizes are adequate to give sufficient power, and interventions should be designed that focus on the maintenance in addition to the initiation of eating behavior change.

Problem solving in diabetes self-management: a model of chronic illness self-management behavior

Management of chronic illnesses is a significant public health concern that is made more challenging by problems of regimen adherence. Effective self-management of chronic illnesses such as diabetes requires not only technical skill to perform regimen behaviors but also problem-solving skills to manage daily barriers to regimen adherence and to make appropriate adjustments to the self-care regimen. A review of the empirical literature on the relation between problem solving and disease self-management in diabetes, a chronic illness exemplar, illuminates methodological limitations that indicate a need for a theoretical framework for problem solving applied to chronic disease self-management. A problem-solving model of chronic disease self-management is proposed, derived from theories of problem solving in cognitive psychology, educational/learning theory, and social problem solving. Four essential components of problem solving in disease self-management are identified: (a). problem-solving skill, (b). problem-solving orientation, (c). disease-specific knowledge, and (d). transfer of past experience. The model is illustrated, and empirical support for this problem-solving model in the diabetes literature is discussed. The model has utility in driving testable hypotheses regarding the relation of disease-specific problem solving to chronic illness management, in developing problem-solving assessment instruments relevant to disease self-management, and in guiding disease self-management training and interventions.