Katherine Hadlandsmyth

Health care utilisation in patients with non-cardiac chest pain: A longitudinal analysis of chest pain, anxiety and interoceptive fear

Chest pain can be a frightening experience that leads many to seek medical evaluation. The symptom results in costly health care utilisation. Over half of patients referred for cardiac evaluations of chest pain do not obtain definitive medical explanations for their symptoms; these cases are described as non-cardiac chest pain (NCCP). Some patients with NCCP are not reassured after being informed their chest pain is non-cardiac in origin and seek repeated medical evaluation. Co-morbid anxiety and mood disorders often coexist with NCCP and are associated with health care utilisation. The current study examined chest pain, general anxiety, interoceptive fear and health care utilisation in a sample of 196 chest pain patients near the time of cardiac evaluation (Time 1), and 70 of these patients one year later (Time 2). Results indicate that anxiety and interoceptive fear were significantly associated with health care utilisation at Time 1, and only interoceptive fear (at Time 1) predicted health care utilisation at Time 2. This study develops research in this area by examining the relation of anxiety and health care utilisation longitudinally in patients with NCCP.

Does depression mediate the relation between fatigue severity and disability in chronic fatigue syndrome sufferers

OBJECTIVE Chronic fatigue syndrome (CFS) is often associated with significant levels of disability. Although fatigue and depression have been found to be independently related to severity of disability, it is not clear how these three factors are mutually related. The present study sought to address this issue by specifically testing a model of mediation whereby depression was hypothesized to influence relations between fatigue and disability. METHODS Participants included 90 individuals seeking treatment for CFS at a tertiary care facility. Each provided demographic information and completed standardized measures of depression and fatigue severity, as well as a measure of disability, which assessed difficulties in physical, psychosocial, and independence domains. RESULTS Analyses indicated that depression and fatigue were positively correlated with one another, as well as all three disability domains. Analyses of mediation indicated that depression completely mediated the relation between fatigue and psychosocial disability and partially mediated the relation between fatigue and the other two disability domains. Indirect effects tests indicated that the inclusion of depression in the statistical models was statistically meaningful. CONCLUSIONS These results replicate previous findings that fatigue and depression are independently related to disability in those with CFS. A more complex statistical model, however, suggested that depression severity substantially influenced the strength of the relation between fatigue and disability levels across a range of domains, including complete mediation in areas involving psychosocial functioning. These results may aid in clarifying contemporary conceptualizations of CFS and provide guidance in the identification of appropriate treatment targets.

Quality of Life in Patients with Non-CAD Chest Pain: Associations to Fear of Pain and Psychiatric Disorder Severity

Chest pain in the absence of identified cardiac cause, or non-cardiac chest pain (NCCP), is a common condition that may result in impaired quality of life. Theories of NCCP put forward that patients who react to cardiopulmonary sensations with fear may avoid activities that elicit cardiac sensations. Co-morbid psychiatric disorders, which are prevalent in this population, may predispose individuals to be more vigilant to physiological sensations, including cardiac-related symptoms. The daily impact of avoiding cardiopulmonary cues may limit quality of life. This study examined psychiatric disorders, fear of pain, and quality of life in 30 non-coronary artery disease (CAD) chest pain patients. Psychiatric disorder severity was independently associated with mental health related quality of life and fear of pain was independently associated with physical health related quality of life. This research adds understanding to contributory factors to impaired quality of life among patients with non-CAD chest pain.

Decline in Prescription Opioids Attributable to Decreases in Long-Term Use: A Retrospective Study in the Veterans Health Administration 2010–2016

BackgroundImproved understanding of temporal trends in short- and long-term opioid prescribing may inform efforts to curb the opioid epidemic.ObjectiveTo characterize the prevalence of short- and long-term opioid prescribing in the Veterans Health Administration (VHA) from 2010 to 2016.DesignObservational cohort study using VHA databases.ParticipantsAll patients receiving at least one outpatient prescription through the VHA during calendar years 2010 through 2016.Main MeasuresPrevalence of opioid use from 2010 through 2016, stratified by short-term, intermediate-term, and long-term use. Temporal trends in discontinuation among existing long-term users and initiation of new long-term use and the net impact on rates of long-term opioid use. Relative likelihood of transitioning to long-term opioid use contrasted with use patterns in the prior year.Key ResultsThe prevalence of opioid prescribing was 20.8% in 2010, peaked at 21.2% in 2012, and declined annually to 16.1% in 2016. Between 2010 and 2016, reductions in long-term opioid prescribing accounted for 83% of the overall decline in opioid prescription fills. Comparing data from 2010–2011 to data from 2015–2016, declining rates in new long-term use accounted for more than 90% of the decreasing prevalence of long-term opioid use in the VHA, whereas increases in cessation among existing long-term users accounted for less than 10%. The relative risk of transitioning to long-term use during 2016 was 6.5 (95% CI: 6.4, 6.7) among short-term users and 35.5 (95% CI: 34.8, 36.3) among intermediate users, relative to patients with no opioid prescriptions filled during 2015.ConclusionsOpioid prescribing trends followed similar trajectories in VHA and non-VHA settings, peaking around 2012 and subsequently declining. However, changes in long-term opioid prescribing accounted for most of the decline in the VHA. Recent VA opioid initiatives may be preventing patients from initiating long-term use. This may offer valuable lessons generalizable to other healthcare systems.

Predictors of Long-Term Opioid Use After Opioid Initiation at Discharge From Medical and Surgical Hospitalizations

Opioid analgesics may be initiated following surgical and medical hospitalization or in ambulatory settings; rates of subsequent long-term opioid (LTO) use have not been directly compared. This retrospective cohort study of the Veterans Health Administration (VHA) included all patients receiving a new outpatient opioid prescription from a VHA provider in fiscal year 2011. If a new outpatient prescription was filled within 2 days following hospital discharge, the initiation was considered a discharge prescription. LTO use was defined as an episode of continuous opioid supply lasting a minimum of 90 days and beginning within 30 days of the initial prescription. We performed bivariate and multivariate analyses to identify the factors associated with LTO use following surgical and medical discharges. Following incident prescription, 5.3% of discharged surgical patients, 15.2% of discharged medical patients, and 19.3% of outpatient opioid initiators received opioids long term. Medical and surgical patients differed; surgical patients were more likely to receive shorter prescription durations. Predictors of LTO use were similar in medical and surgical patients; the most robust predictor in both groups was the number of days’ supply of the initial prescription (odds ratio [OR] = 1.24 and 95% confidence interval [CI], 1.12–1.37 for 8–14 days; OR = 1.56 and 95% CI, 1.39–1.76 for 15–29 days; and OR = 2.59 and 95% CI, 2.35–2.86 for >30 days) compared with the reference group receiving ⩽7days. Rates of subsequent LTO use are higher among discharged medical patients than among surgical patients. Characteristics of opioid prescribing within the initial 30 days, including initial dose and days prescribed, were strongly associated with LTO use.

Risk for Prolonged Opioid Use Following Total Knee Arthroplasty in Veterans

BACKGROUND Patients undergoing total knee arthroplasty (TKA) may be at risk for prolonged postsurgical opioid use due to a high prevalence of persistent postsurgical pain (20%) and high rates of presurgical opioid use. METHODS The current study uses a Veterans Health Administration sample of 6653 Veterans who underwent TKA in the fiscal year 2014 that did not require surgical revision during the subsequent year. RESULTS Sixty percent of the sample had used an opioid in the year prior to surgery, including 20% who were on long-term opioid use at the time of surgery (defined as 90+ days of continuous use) and 40% with any other opioid use in the year prior to surgery. In patients on long-term opioids at the time of surgery, 69% received opioids for at least 6 months and 57% for at least 12 months after TKA. In patients not on long-term opioids at the time of TKA, only 4% received opioids for at least 6 months and 2% for at least 12 months after TKA. Differing risk factors for prolonged opioid use 12 months after TKA were identified in these 2 cohorts (ie, those who were and were not receiving long-term opioids at TKA). CONCLUSION These findings suggest that the greatest risk for prolonged opioid use after TKA is preoperative opioid use.

Somatic symptom presentations in women with fibromyalgia are differentially associated with elevated depression and anxiety

This study examined whether depression and anxiety differentially relate to fatigue, sleep disturbance, pain catastrophizing, fear of movement, and pain severity in women with fibromyalgia. Baseline data from the Fibromyalgia Activity Study with Transcutaneous Electrical Nerve Stimulation were analyzed. Of 191 participants, 50 percent reported high anxiety and/or depression (17% high anxiety, 9% high depression, and 24% both). Fatigue and sleep impairment were associated with high depression (p < 0.05). Pain severity, pain catastrophizing, and fear of movement were associated with high anxiety and high depression (p < 0.05). Possible implications for underlying mechanisms and the need for targeted treatments are discussed.

Development of a method to maximize the transcutaneous electrical nerve stimulation intensity in women with fibromyalgia

Introduction Transcutaneous electrical nerve stimulation (TENS) is a non-pharmacological intervention clinically used for pain relief. The importance of utilizing the adequate stimulation intensity is well documented; however, clinical methods to achieve the highest possible intensity are not established. Objectives Our primary aim was to determine if exposure to the full range of clinical levels of stimulation, from sensory threshold to noxious, would result in higher final stimulation intensities. A secondary aim explored the association of pain, disease severity, and psychological variables with the ability to achieve higher final stimulation intensity. Methods Women with fibromyalgia (N=143) were recruited for a dual-site randomized controlled trial – Fibromyalgia Activity Study with TENS (FAST). TENS electrodes and stimulation were applied to the lumbar area, and intensity was increased to sensory threshold (ST), then to “strong but comfortable” (SC1), then to “noxious” (N). This was followed by a reduction to the final stimulation intensity of “strong but comfortable” (SC2). We called this the Setting of Intensity of TENS (SIT) test. Results There was a significant increase from SC1 (37.5 mA IQR: 35.6–39.0) to SC2 (39.2 mA IQR: 37.1–45.3) (p<0.0001) with a mean increase of 1.7 mA (95% CI: 1.5, 2.2). Linear regression analysis showed that those with the largest increase between SC1 and N had the largest increase in SC2–SC1. Further, those with older age and higher anxiety were able to achieve greater increases in intensity (SC2–SC1) using the SIT test. Conclusion The SC2–SC1 increase was significantly associated with age and anxiety, with greater mean increases associated with older age and higher anxiety. Thus, although all patients may benefit from this protocol, older women and women with elevated anxiety receive the greatest benefit.

Relationships among pain intensity, pain-related distress, and psychological distress in pre-surgical total knee arthroplasty patients: a secondary analysis.

Abstract The current study aimed to examine the relationships between movement and resting pain intensity, pain-related distress, and psychological distress in participants scheduled for total knee arthroplasty (TKA). This study examined the impact of anxiety, depression, and pain catastrophizing on the relationship between pain intensity and pain-related distress. Data analyzed for the current study (N = 346) were collected at baseline as part of a larger Randomized Controlled Trial investigating the efficacy of TENS for TKA (TANK Study). Participants provided demographic information, pain intensity and pain-related distress, and completed validated measures of depression, anxiety, and pain catastrophizing. Only 58% of the sample reported resting pain >0 while 92% of the sample reported movement pain >0. Both movement and resting pain intensity correlated significantly with distress (rs = .86, p < .01 and .79, p < .01, respectively). About three quarters to two thirds of the sample (78% for resting pain and 65% for movement pain) reported different pain intensity and pain-related distress. Both pain intensity and pain-related distress demonstrated significant relationships with anxiety, depression, and catastrophizing. Of participants reporting pain, those reporting higher anxiety reported higher levels of distress compared to pain intensity. These findings suggest that anxious patients may be particularly distressed by movement pain preceding TKA. Future research is needed to investigate the utility of brief psychological interventions for pre-surgical TKA patients.