Eun Joo Yang

Longitudinal change of treatment‐related upper limb dysfunction and its impact on late dysfunction in breast cancer survivors: A prospective cohort study

To investigate the prevalence of upper limb dysfunction (ULD) and subtypes after breast cancer surgery and to identify factors associated with late ULD.

Effects of transcranial direct current stimulation (tDCS) on post-stroke dysphagia

PURPOSE Transcranial direct current stimulation (tDCS) combined with swallowing training might improve swallowing function in patients with post-stroke dysphagia. We investigate the effects of transcranial direct current stimulation (tDCS) combined with swallowing training on post-stroke dysphagia. METHODS Sixteen patients with post-stroke dysphagia, diagnosed using video fluoroscopic swallowing (VFSS), were randomly assigned into two groups: (1) anodal tDCS group (1 mA for 20 min), or (2) sham group (1 mA for 30 s). Patients received anodal tDCS or sham over the pharyngeal motor cortex of the affected hemisphere during 30 min of conventional swallowing training for 10 days. Functional dysphagia scale (FDS) scores based on VFSS were measured at baseline and immediately and 3 months after the intervention. The effect of tDCS on dysphagia was analyzed using a generalized linear model (GLM) with repeated measures. RESULTS After the intervention, FDS scores improved in both groups without significant differences. However, 3 months after the intervention, anodal tDCS elicited greater improvement in terms of FDS compared to the sham group (β = -7.79, p = 0.041) after controlling for age, National Institutes of Health Stroke Scale (NIHSS) score, lesion size, baseline FDS score, and time from stroke onset. CONCLUSIONS Anodal tDCS applied over the affected pharyngeal motor cortex can enhance the outcome of swallowing training in post-stroke dysphagia. Our results suggest that non-invasive cortical stimulation has a potential role as an adjuvant strategy during swallowing training in patients with post-stroke dysphagia.

Complementary and alternative medicine use and assessment of quality of life in Korean breast cancer patients: a descriptive study

PurposeThe worldwide use of complementary and alternative medicine (CAM) among cancer patients has increased, with breast cancer patients being more likely to use CAM compared with any other cancer patients. However, few surveys have systematically described CAM use among Korean breast cancer patients. This study investigated the use of CAM among patients who were diagnosed with breast cancer, along with the relevant demographic and clinical factors related to CAM use. We also compared the difference in quality of life between CAM users and nonusers.MethodsA total of 661 patients were invited to participate in this study during routine clinic visits, with 425 patients ultimately participating. Three hundred ninety-nine questionnaires were completed and used in the final analysis. Quality of life was evaluated based on the Korean versions of the EORTC QLQ-C30 and EORTC QLQ-BR23.ResultsPrevious or current CAM usage was reported by 229 patients (57.4%). Independent factors related to CAM use were marital status, cancer stage, and coexisting illness. The common types of CAM use included exercise therapy (43.2%) and ingestion of vitamins and minerals (41.9%). The reasons for CAM use were to boost the immune system (53.2%), promote health (46.8%) and prevent recurrence (37.7%). Large proportions (70.4%) of CAM users did not discuss their CAM use with their physicians. Only a small number of CAM users (2.5%) answered that they were unsatisfied with their CAM use, with most CAM users reporting that they would continue their CAM use. Quality of life was not significantly different between CAM users and nonusers.ConclusionsA significant number of patients with breast cancer have used CAM, and health care providers should be aware of the variety of CAM methods and their patients’ CAM uses for the proper management of breast cancer.

Effect of a pelvic floor muscle training program on gynecologic cancer survivors with pelvic floor dysfunction: A randomized controlled trial

OBJECTIVE To investigate the effects of a pelvic floor rehabilitation program (PFRP) on pelvic floor function and quality of life (QoL) in gynecological cancer survivors in a prospective, randomized, controlled trial. METHODS Thirty-four patients with gynecological cancers recruited between July 2009 and December 2009 were randomly allocated into two groups: a PFRP group (n=17), who participated in a 4-week PFRP exercise program, and a non-PFRP group (n=17), who received the usual health care. The pelvic floor strength, the motor evoked potentials (MEPs) elicited by sacral and transcranial magnetic stimulation, the pelvic floor questionnaire, and the scores on two QoL questionnaires, (QLQ)-C30 and QLQ-CX 24, from the European Organization for Research and Treatment of Cancer (EORTC) were evaluated to assess changes in pelvic floor function and QoL before and after the exercise program. RESULTS Twenty four patients (12 from each group) completed the exercise program. The PFRP group improved in pelvic floor strength (mean difference (MD)=14.22, t(9)=2.389, P=0.036) and sexual functioning. The PFRP group also improved in physical and sexual function compared with the non-PFRP group. CONCLUSIONS The results suggest that the PFRP improved pelvic floor dysfunction and QoL of gynecological cancer patients. A larger randomized controlled trial is planned.

Functional Recovery After Ischemic Stroke Is Associated With Reduced GABAergic Inhibition in the Cerebral Cortex A GABA PET Study

Background: γ-Aminobutyric acid (GABA) plasticity plays an important role in stroke motor recovery in a mouse model. However, little is known about changes over time in neuronal excitability mediated by GABA receptors in human stroke patients. Objectives: To establish the mechanism of neuroplasticity during the recovery phase following ischemic stroke by assessing the changes in cerebral GABA activity using [18F]flumazenil ([18F]FMZ) positron emission tomography (PET). Methods: A total of 10 patients with unilateral ischemic stroke were studied at 1 month (T0) and 3 months (T1) postonset using [18F]FMZ PET. Changes in regional GABAergic activity were assessed longitudinally, and values were also compared with those in 15 age-matched controls. Upper-extremity motor function was evaluated using the Fugl-Meyer score (FMS). Results: During the follow-up period, statistical parametric mapping analysis demonstrated a decrease in GABAA receptor availability throughout the cerebral cortex and cerebellum, especially the contralateral hemisphere. GABAA availability in the bilateral primary motor cortex, contralateral supplemental motor cortex, and globus pallidus at T0 was positively correlated with the FMS score at T1. Conclusions: This is the first prospective, controlled longitudinal study showing that the change in GABA receptor availability over time is significantly related to motor recovery after stroke in humans. This work supports the rationale for a novel strategy to promote motor recovery after stroke.

Oropharyngeal Dysphagia in a Community-Based Elderly Cohort: the Korean Longitudinal Study on Health and Aging

This study was conducted to investigate the prevalence of dysphagia and evaluated the association of dysphagia and activities of daily living in a geriatric population residing in an independent-living facility in Korea. Korean men and women 65-yr and older living in a single, typical South Korean city (n=415) were enrolled in the Korean Longitudinal Study on Health and Aging study. Dysphagia was assessed using the Standardized Swallowing Assessment. Data were collected on activities of daily living (ADL), instrumental ADL (IADL), and medical history and laboratory. The overall prevalence of dysphagia in the random sample was 33.7% (95% CI, 29.1-38.4), including 39.5% in men and 28.4% in women. The identified risk factors for dysphagia were men (OR, 3.6, P=0.023), history of stroke (OR, 2.7, P=0.042) and presence of major depressive disorder (OR, 3.0, P=0.022). Dysphagia was associated with impairment in IADL domains of preparing meals and taking medicine (P=0.013 and P=0.007, respectively). This is the first published report of the prevalence of dysphagia in older community-dwelling Koreans. Dysphagia is a common problem among elderly people that limits some IADL domains.

Association between muscle strength and metabolic syndrome in older Korean men and women: the Korean Longitudinal Study on Health and Aging

The objective of the study was to investigate the association between metabolic syndrome (MS) and muscle strength in community-dwelling older men and women in Korea. Korean men and women 65 years and older living in a single, typical South Korean city (n = 647) were enrolled in the Korean Longitudinal Study on Health and Aging study. The diagnosis of MS was evaluated according to the definition of the National Cholesterol Education Program Adult Treatment Panel III. Isokinetic muscle strength of the knee extensors, as determined by peak torque per body weight (newton meter per kilogram) and hand-grip strength per body weight (newton per kilogram), was measured. Participants without MS had greater leg muscle strength and grip strength per weight. The effect of MS on muscle strength was more prominent in men than in women in our study population. Only men showed a significant interaction between MS and age for muscle strength (P = .014), and the effect was greater in men aged 65 to 74 years compared with those older than 75 years (119.2 ± 31.2 vs 134.5 ± 24.3 N m/kg). Participants with MS had weaker knee extensor strength after controlling the covariates (β = -90.80, P = .003), and the interaction term (age × MS × male sex) was significant (β = 1.00, P = .017). Metabolic syndrome is associated with muscle weakness, and this relationship is particularly pronounced in men. Age can modify the impact of MS on muscle strength. Men aged 65 to 74 years with MS need a thorough assessment of muscle strength to prevent disability.

The effect of back school integrated with core strengthening in patients with chronic low-back pain.

Yang EJ, Park W-B, Shin H-I, Lim J-Y: The Effect of Back School Integrated with Core Strengthening in Patients with Chronic Low-Back Pain. Objective:To assess the effect of back school integrated with core-strengthening exercises on back-specific disability and pain-coping strategies and to examine how reactions to pain affect the outcomes of back school in patients with chronic low back pain. Design:A single-center prospective trial was conducted with 142 participants with chronic low-back pain (38 men and 104 women) who completed a back school program at the spine center of a university hospital. The subjects participated in a 4-wk program integrated with core-strengthening exercises. Back-specific disabilities were measured as a primary outcome before and after the program. Secondary outcomes were pain, Chronic Pain Coping Inventory, general health status assessed by the SF-36, and quantitative functional evaluations of factors, such as trunk muscle strength, endurance, and the back performance scale. A subgroup of 28 subjects (12 men and 16 women) of the total sample of 142 subjects was used to analyze the longitudinal association between coping strategies and the primary outcome in a long-term follow-up study. These participants were divided into three groups (much improved, slightly improved, and unimproved) based on changes in back-specific disability scores. Results:Participants improved significantly in terms of back-specific disability, pain, general health, and quantitative functional tests according to the short-term evaluation. They used more relaxation and exercise/stretching techniques as coping strategies. Of the groups participating in the longer-term follow-up (T3), the much-improved group showed significant improvement between T1 (before back school) and T2 (after back school) in scores for relaxation (1.6 ± 1.0 vs. 2.6 ± 1.1), task persistence (2.9 ± 1.2 vs. 3.7 ± 1.2), and exercise (3.3 ± 1.1 vs. 5.2 ± 1.9), but the coping strategies of those in the slightly improved and unimproved groups did not change significantly at T2. Conclusions:Our back school program may help patients with chronic low back pain reduce back-specific disability and pain and develop wellness-focused coping strategies such as exercise and stretching.

Neuronavigated vs. Conventional Repetitive Transcranial Magnetic Stimulation Method for Virtual Lesioning on the Broca's Area

This study was undertaken to test the hypothesis that repetitive transcranial magnetic stimulation (rTMS) using a neuronavigational TMS system (nTMS) to the Brocas area would elicit greater virtual aphasia than rTMS using the conventional TMS method (cTMS).

Use of the International Classification of Functioning, Disability and Health as a Functional Assessment Tool for Breast Cancer Survivors

Purpose To develop a patient self-completed questionnaire from the items of the Brief Core Set Questionnaire for Breast Cancer (BCSQ-BC) and to investigate the prevalence of specific dysfunctions throughout the course of cancer and treatments. Methods From January 2010 to February 2011, 96 breast cancer patients were evaluated with BCSQ-BC developed for clinical application of International Classification of Functioning, Disability and Health (ICF). Quality of life and upper limb dysfunction using disabilities of arm, shoulder and hand (DASH) were assessed. Content validity was evaluated using correlations between BCSQ-BC and European Organization for Research and Treatment of Cancer (EORTC) QLQ and DASH scores. Construct validity was computed using exploratory factor analysis. Kappa statistics were computed for agreement between test-retest ICF data. The level of significance and odds ratios were reported for individuals with early post-acute and long-term context and with total mastectomy and breast conservative surgery. Results There was consistently good test-retest agreement in patient-completed questionnaires (kappa value, 0.76). Body function, activity and participation subscales are significantly related with EORTC QLQ and DASH. Problems with activity and participation were strongly associated with physical functional domains of EORTC QLQ (r=-0.708, p<0.001) and DASH (r=0.761, p<0.001). The prevalence of dysfunctions varied with type of surgery and time after cancer. Immobility of joint (15% vs. 7%) and lymphatic dysfunction (17% vs. 3%) were indexed more frequently in extensive surgery cases than in conservative surgery. Muscle power (16% vs. 8%), exercise tolerance functions (12% vs. 4%) and looking after ones health (10% vs. 2%) were impaired within 1 year after surgery, while sleep dysfunction (8% vs. 14%) was a major problem over 1 year after surgery. Conclusion The BCSQ-BC identifies the problems comprehensively in functioning of patients with breast cancer. We revealed the interaction with the ICF framework adopting a multifactor understanding of function and disability.