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Volume 2 | October 2024
Trip Latest Evidence Journal

Vol 2 - Oct 2024 Evidence for Primary Care

Evidence for Primary Care: the latest evidence from the Trip Database

A summary of some of the most important new documents for primary care that have recently been added to the Trip Database

Editorial: A Whimsical Dive into the Latest on Pain, Migraines, Broken Hearts, and Pelvic Floors

In the latest health research highlights, we uncover the less-than-perfect realities behind popular treatments. For chronic pain relief, antidepressants may have slipped off their pedestal—except for duloxetine, which holds some modest promise. But even here, the spotlight shifts to non-drug options for reliable support. For chronic migraine, however, we see promising results from Botox and CGRP monoclonal antibodies, at least until the price tag (and needle-phobia) come into play. And for cost-conscious sufferers, Topiramate still puts up a respectable, if not headline-grabbing, effort.

On a more heart-wrenching note, broken heart syndrome is no metaphor for some. In Takotsubo cardiomyopathy, intense emotional or physical stress leads to actual cardiac changes, particularly in post-menopausal women. Here, a complex brew of catecholamines, endothelial dysfunction, and low estrogen contribute to what’s aptly termed "broken heart syndrome."

And let’s not forget the pelvic floor muscle—the underdog in health improvement. Pelvic floor muscle training (PFMT) offers solid support for women dealing with stress incontinence and pelvic organ prolapse. Men and those with fecal incontinence, however, may need to look elsewhere for relief. Still, if Ontario opens the purse strings for PFMT, it’s clear that at least some patients will benefit greatly, without needing surgery.

So, whether it’s pain, migraines, emotional heartache, or pelvic dysfunction, these studies remind us that the search for effective treatments is both exciting and humbling—driven by science and laced with unexpected side effects, costs, and, yes, some unintended humor.

NIHR HTA

Are Antidepressants Effective for Managing Chronic Pain in Adults?

Clinical Bottom Line: Duloxetine is the only antidepressant with reliable evidence supporting its use for chronic pain, showing moderate effectiveness at standard doses. Evidence for other antidepressants is limited, and non-drug options should be considered.

Summary: This meta-analysis of 176 studies found duloxetine to be the most effective antidepressant for chronic pain relief, with limited evidence for other antidepressants. Findings suggest duloxetine may be beneficial, but further research is needed, particularly on long-term effects and safety.

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NIHR HTA

Evaluating the Clinical and Cost-Effectiveness of Preventive Drugs for Chronic Migraine Management

Clinical Bottom Line: Calcitonin gene-related peptide monoclonal antibodies (CGRP mAbs) and Botox are effective in reducing headache and migraine days for chronic migraine, with CGRP mAbs often showing greater improvements in headache-related quality of life. Topiramate, while less effective, remains the most cost-effective option at lower willingness-to-pay thresholds.

Summary: This systematic review and economic analysis evaluated six preventive drugs for chronic migraine, with CGRP monoclonal antibodies (eptinezumab and fremanezumab) ranking highest for reducing migraine days and improving quality of life. Botox and CGRP mAbs were more effective than topiramate, but topiramate remained the most cost-effective if cost constraints were prioritized. Adverse events were common, particularly injection site reactions for CGRP mAbs and nervous system issues for topiramate. Further research is recommended to refine comparisons and evaluate other oral options.

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Clinical Correlations

Mama, Can You Die from a Broken Heart?” Exploring the Pathogenesis of Takotsubo Cardiomyopathy

Clinical Bottom Line: Takotsubo cardiomyopathy, often triggered by intense emotional or physical stress, is primarily seen in post-menopausal women and presents with left ventricular dysfunction. The condition is believed to be driven by an excess of catecholamines, endothelial dysfunction, and estrogen deficiency, contributing to characteristic cardiac “ballooning” and increased cardiovascular risk.

Summary: Takotsubo cardiomyopathy, known as “broken heart syndrome,” is characterized by sudden left ventricular dysfunction without obstructive coronary disease, often following severe stress. Key mechanisms include catecholamine surges leading to myocardial dysfunction, endothelial dysfunction causing impaired coronary blood flow, and a decline in cardioprotective estrogen in post-menopausal women. This complex interplay affects heart contractility and increases vulnerability to ischemia, particularly in the left ventricular apex. As research deepens, future treatments may better target these pathways to prevent stress-induced cardiomyopathy.

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Ontario Health HTA

Is Pelvic Floor Muscle Training Effective for Pelvic Floor Dysfunction?

Clinical Bottom Line: Pelvic floor muscle training (PFMT) is effective for improving symptoms and satisfaction in women with stress urinary incontinence and pelvic organ prolapse, but less effective for men with stress urinary incontinence after prostatectomy and adults with fecal incontinence. Publicly funding PFMT in Ontario would increase healthcare costs substantially over five years.

Summary: This health technology assessment reviewed the effectiveness, safety, and cost implications of PFMT for pelvic floor dysfunction. PFMT significantly improved symptoms for women with stress urinary incontinence and pelvic organ prolapse, but showed limited or mixed results for men’s post-prostatectomy urinary incontinence and adults with fecal incontinence. Economic analysis indicated PFMT as a cost-effective intervention for women with urinary incontinence but uncertain for other groups. Public funding would require significant financial investment over the next five years, yet patients value PFMT as a preferred nonsurgical treatment.

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NICE Clinical Knowledge Summaries

Effective Primary Care Management Strategies for Bipolar Disorder

Clinical Bottom Line: Refer patients with suspected bipolar disorder to mental health specialists for diagnosis and acute management. Primary care should focus on monitoring symptoms, medication, and health annually, with support for relapse and recovery.

Summary: Primary care providers should prioritize referral to mental health services for diagnosis and treatment initiation in bipolar disorder. Ongoing primary care includes regular health checks, medication management, and support for relapse and daily function.

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J Gen Intern Med .

Which Decision Aids Are Most Effective for Cancer Screening Decision-Making?

Clinical Bottom Line: Decision aids (DAs) enhance shared decision-making in cancer screening by increasing knowledge, reducing decisional conflict, and supporting informed choice. However, evidence is insufficient to determine if any specific DA format is more effective than others for cancer screening.

Summary: This overview of 22 systematic reviews found that DAs improve shared decision-making in cancer screening, especially in knowledge gain and informed choice across various cancers. DAs decreased screening uptake for prostate and breast cancers but increased it for colorectal cancer. While DAs are effective in improving decision-making quality, there is limited data on the comparative effectiveness of different DA formats.

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Tools for Practice

What Is the Optimal Initial Insulin for Type 2 Diabetes

Clinical Bottom Line: For patients with type 2 diabetes inadequately controlled on oral agents, starting basal insulin is a simpler, effective approach with fewer side effects than biphasic insulin. While biphasic insulin may reduce HbA1c slightly more, it leads to more weight gain and hypoglycemia without clear cardiovascular benefits.

Summary: This review suggests basal insulin as the preferred initial insulin for type 2 diabetes, balancing effectiveness and simplicity with fewer side effects. Biphasic insulin offers minor HbA1c benefits but adds risks. No insulin type has shown cardiovascular advantages in trials.

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INESSS

What Are the Best Diagnostic Tests for Assessing Chronic Dyspnea?

Clinical Bottom Line: A structured diagnostic approach for chronic dyspnea emphasizes detailed history and physical exam, with specific tests like ECG, natriuretic peptides, and spirometry directed by suspected etiology. This approach helps reduce unnecessary testing and improve resource use.

Summary: This INESSS report provides guidance for selecting diagnostic tests in chronic dyspnea, emphasizing targeted use based on symptoms and clinical suspicion. Recommended tests help diagnose common causes like heart failure and asthma, while other causes may require advanced testing or specialist referral.

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JAMA Psychiatry

Can Patient Self-Guided Interventions Reduce Sedative Use and Improve Sleep?

Clinical Bottom Line: The YAWNS-1 intervention, a direct-to-patient package with educational materials, effectively reduces benzodiazepine receptor agonist (BZRA) use and improves sleep outcomes in older adults with insomnia, showing greater impact than an alternative version (YAWNS-2) and usual care.

Summary: This randomized clinical trial found that the YAWNS-1 intervention significantly reduced BZRA use and improved sleep measures like insomnia severity and daytime sleepiness compared to usual care and YAWNS-2. The findings support YAWNS-1 as a scalable, patient-directed tool to promote safe sleep transitions in older adults.

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Age Ageing

Can Simple Modifications Improve Fall Risk Stratification in Older Adults?

Clinical Bottom Line: Modifying the World Falls Guidelines algorithm by broadening the Timed Up and Go test cut-off improves its ability to classify older adults into distinct low, intermediate, and high fall-risk groups, enabling better-targeted fall prevention strategies.

Summary: This study found that modifying the fall risk assessment algorithm to a >10-second cut-off for the Timed Up and Go test resulted in three balanced fall-risk groups, including an intermediate group with characteristics similar to high-risk but a lower fall rate. This refined stratification could aid in more personalized and effective fall prevention for older adults.

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NIHR Health and Social Care Delivery Research

How Can We Measure Quality of Life for Care Home Residents?

Clinical Bottom Line: A stakeholder consultation identified key principles and measures to assess quality of life for care home residents, resulting in four outcome measures included in the DACHA minimum data set, enhancing data-driven quality of life monitoring in UK care homes.

Summary: The DACHA study engaged stakeholders from various sectors to prioritize essential domains for assessing care home residents’ quality of life. Using a Delphi-inspired approach, the consultation resulted in a consensus on four key measures, contributing to a standard data set prototype for quality of life assessments. This effort advances a unified approach for quality of life measurement across care homes in the UK.

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JAMA Netw Open

Is Long-Term Use of Muscle Relaxants Effective for Chronic Pain?

Clinical Bottom Line: Long-term use of muscle relaxants may offer benefits for chronic neck pain and painful spasms but shows limited efficacy for conditions like low back pain, fibromyalgia, and headaches. Clinicians should monitor for common side effects, such as sedation, and consider deprescribing if pain goals are unmet.

Summary: This systematic review evaluated 30 RCTs and 14 cohort studies on long-term muscle relaxant use for chronic pain. Benefits were found mainly for neck pain and painful spasms, while conditions like low back pain and fibromyalgia showed limited benefit. Side effects, including sedation, are common, highlighting the need for cautious long-term use and regular reassessment of effectiveness.

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Therapeutics Initiative

Is Tight Glycemic Control Harmful for Older Adults with Type 2 Diabetes?

Clinical Bottom Line: For older adults with type 2 diabetes, maintaining an HbA1c below 7% may increase the risk of hypoglycemia without cardiovascular benefits. Relaxed glycemic targets (7.5-8.5%) are safer, especially for those on insulin or sulfonylureas.

Summary: This Therapeutics Initiative review highlights that strict HbA1c targets (<7%) in older adults increase hypoglycemia risk, recommending relaxed targets based on individual health status. Deprescribing insulin or sulfonylureas may be safer for older adults with multimorbidities, focusing on personalized and less intensive glucose control.

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Tools for Practice

Does Vitamin D Prevent Fragility Fractures?

Clinical Bottom Line: Vitamin D alone does not prevent fractures. A vitamin D and calcium combination may slightly reduce fracture risk, particularly in women in long-term care, but carries an increased risk of kidney stones.

Summary: This review of multiple studies finds that vitamin D alone is ineffective for fracture prevention, while combining vitamin D with calcium shows minor benefit for fracture risk reduction in specific populations. Potential adverse effects, particularly kidney stones, highlight the need for cautious use and monitoring. Regular testing of vitamin D levels for fracture prevention is not supported.

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NIHR HTA

Low-Dose Amitriptyline as an Effective Second-Line Treatment for IBS in Primary Care

Clinical Bottom Line: Low-dose amitriptyline significantly improves irritable bowel syndrome (IBS) symptoms in patients unresponsive to first-line treatments, with mild adverse effects. It is an effective second-line option in primary care.

Summary: The ATLANTIS RCT found that low-dose amitriptyline reduced IBS symptom severity over 6 months compared to placebo. Although some patients experienced mild side effects, most tolerated self-titration well. The study supports the use of low-dose amitriptyline as a second-line IBS treatment in primary care, emphasizing clear communication to patients about its role beyond depression treatment.

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UK Health Security Agency

Guidelines for Identifying and Managing Suspected Mpox Cases

Clinical Bottom Line: Suspect mpox in patients with a relevant rash, history of exposure, or travel to affected areas. Patients with Clade I risk factors or severe symptoms should be managed as high-consequence infectious disease (HCID) cases.

Summary: UK guidelines recommend assessing mpox risk based on symptoms, contact history, and travel to outbreak regions. High-risk cases require specialized management and reporting. Clinicians are advised to consider common differential diagnoses and to implement infection control measures for suspected cases.

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JAMA Intern Med

Can Nurse-Supported Self-Directed CBT Improve Insomnia in Veterans?

Clinical Bottom Line: Nurse-supported, self-directed CBT for insomnia (CBTi) significantly reduces insomnia severity and improves sleep outcomes among veterans, offering a viable alternative when access to therapist-led CBTi is limited.

Summary: This trial evaluated a nurse-assisted, self-directed CBTi approach for veterans, showing significant reductions in insomnia severity and improvements in sleep metrics compared to health education alone. Benefits in sleep quality, depression, and fatigue were observed at 8 weeks and sustained at 6 months, supporting this approach as an effective, accessible option for veterans with insomnia and comorbid mental health conditions.

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