1.Trajectory of intrinsic capacity and association with daily life ability in people aged 50 years and over in Shanghai
Jiaqi WANG ; Yanfei GUO ; Yan SHI ; Shuangyuan SUN ; Jiamin CAO ; Anli JIANG ; Yujun DONG ; Ye RUAN ; Fan WU
Chinese Journal of Epidemiology 2025;46(7):1209-1216
Objective:To identify the change trajectory of intrinsic capacity in people aged ≥50 years in Shanghai and explore the impact of intrinsic capacity trajectory change on overall function and dalily life activities in this population.Methods:The longitudinal data from round 1 to 3 Study of Global Ageing and Adult Health in Shanghai were used. The total intrinsic ability scores from five dimensions of cognition, psychology, sensory, vitality and locomotion were calculated. The censored normal model of group-based trajectory was used to identify the trajectory of intrinsic capacity change over time. Linear regression model and multivariate logistic regression model were used to analyse the effects of different levels intrinsic capacity trajectory on the scores of the WHO Disability Assessment Schedule (WHODAS), the activity of daily living (ADL) and the instrumental activities of daily living (IADL).Results:A total of 2 302 study participants aged ≥50 years with 3 round complete data were included in this study, and 3 levels of intrinsic capacity trajectory were identified, low-level trajectory (9.3%), medium-level trajectory (41.7%), and high-level trajectory (49.0%). Compared with the high-level group, the medium-level and low-level groups had higher WHODAS scores, which increased by 3.578 (95% CI: 2.028-5.129) and 12.620 (95% CI: 9.951-15.289), respectively, and those with more severe disability and those in the low-level group were at higher risk for severe difficulty in ADLs ( OR=12.450, 95% CI: 4.310-35.966) and IADLs ( OR=5.479, 95% CI: 1.311-22.904). Conclusions:Heterogeneity in trajectory of intrinsic capacity exists in people aged ≥50 years in Shanghai. Middle-aged and elderly people with low initial level and rapid decline trajectory of intrinsic capacity are at greater risk for the decline of daily life ability and the increase of disability. It is necessary to strengthen the long-term dynamic monitoring and evaluation of the change trajectory of intrinsic capacity in this population.
2.CGA-guided multidisciplinary intervention for frail non-dialysis elderly patients with chronic kidney disease
Yu'er LIANG ; Jing CHANG ; Yun GAO ; Yanfei WANG ; Qianmei SUN
Chinese Journal of Geriatrics 2025;44(4):490-497
Objective:To investigate the effects of Comprehensive Geriatric Assessment(CGA)-guided multidisciplinary interventions on frail non-dialysis elderly patients with chronic kidney disease, while also assessing the influence of different levels of frailty.Methods:This study is a randomized controlled trial conducted between 2020 and 2021, involving 230 frail, non-dialysis elderly patients with chronic kidney disease stages 3-5, treated at our hospital.Participants were randomly assigned to either an intervention group or a control group using a random number table method, with 115 patients in each group.The intervention group received multidisciplinary treatment over a period of 12 months, while the control group received standard care.We compared Fried frailty scores, re-hospitalization rates, and all-cause mortality between the two groups, and documented changes in CGA both before treatment and 12 months after treatment.Results:After 12 months of treatment, the Fried frail phenotype score was significantly lower in the intervention group(2.7±1.2)compared to the control group(3.6±1.8, t=97.47, P<0.01).Additionally, grip strength in the intervention group was higher(20.6±8.5 kg)than in the control group(13.5±8.1 kg, t=6.57, P<0.01).The scores for the Mini Nutritional Assessment-Short Form(MNA-SF)(10.7±4.0 vs.9.1±4.2, t=29.03, P<0.01), Mini-Mental State Examination Scale(MMSE)(24.3±8.6 vs.19.3±9.6, t=96.35, P<0.01), and Short Physical Performance Battery(SPPB)(6.8±3.2 vs.3.5±2.9, t=71.97, P<0.01)were also significantly higher in the intervention group.Furthermore, the Activity of Daily Living(ADL)score was greater in the intervention group(5.4±1.6)than in the control group(3.9±1.6, t=5.75, P<0.01), as was weight(67.2±11.2 kg vs.64.0±11.8 kg, t=2.02, P=0.045).The frailty reversal rate was significantly higher in the intervention group(32.2% vs.8.0%, χ2=21.4, P<0.01), and the all-cause mortality rate was lower in this group(11.3% vs.22.6%, χ2=5.22, P=0.022).However, there were no significant differences observed in the Geriatric Depression Scale(GDS)(6.3±3.7 vs.6.0±4.3, t=24.29, P>0.05), estimated Glomerular Filtration Rate(eGFR)[(44.1±19.2)ml·(min·1.73m 2) -1vs.(39.8±19.0)ml·(min·1.73m 2) -1, t=1.76, P>0.05], Instrumental Activity of Daily Living(IADL)(5.2±2.2 vs.4.6±2.2, t=1.49, P>0.05), and the rate of readmission(25.2% vs.36.5%, χ2=3.44, P>0.05). Conclusions:Multidisciplinary interventions derived from a comprehensive geriatric assessment can ameliorate or even reverse frailty, reduce all-cause mortality, and enhance the prognosis of frail elderly patients with chronic kidney disease stages 3 to 5 who are not undergoing dialysis.
3.Effect and mechanism of neurotrophin-3 ubiquitination via receptor on neurological function recovery after spinal cord injury in rats
Yan CONG ; Zhide SUN ; Yanfei WANG ; Jian YU
Chinese Journal of Emergency Medicine 2025;34(5):676-683
Objective:To investigate the role and underlying mechanisms of neurotrophin-3 (NT-3) in promoting neurological functional recovery following spinal cord injury (SCI) in rats.Methods:In vivo: Fifteen 8-week-old SPF-grade Sprague-Dawley rats were randomly assigned (via a random number method) to three groups ( n=5 per group): sham-operated (Sham) group, SCI group, and SCI+NT-3 group. A spinal cord compression model was established using a clip method. NT-3 (20 μg/kg) was continuously infused into the subarachnoid space via a microinfusion pump for 7 days. The Basso-Beattie-Bresnahan (BBB) scale was used to assess locomotor function post-SCI, with scores below 21 indicating successful model establishment. Western blotting was performed to analyze the expression levels of NT-3, microtubule-associated protein 1 light chain 3B (LC3B), oligodendrocyte transcription factor 1 (Olig1), and myelin basic protein (MBP) at 1, 3, 5, and 7 days post-injury. In vitro: Oligodendrocytes were isolated from neonatal rat brain tissues, cultured (5×10 4/cm 2), and divided into four groups: oxygen-glucose deprivation (OGD) group, OGD+NT-3 group, OGD+NT-3+ubiquitination inhibitor (UCHL1) group, and OGD+NT-3+ubiquitination agonist (MG132) group. Western blotting was conducted to detect the expression levels of TrkC, Ub-TrkC, and LC3B in each experimental group. Immunofluorescence staining was utilized to observe LC3B aggregation in oligodendrocytes. Morphological alterations in cells were examined through microscopy. Statistical analysis was performed using one-way ANOVA, followed by pairwise comparisons using the least significant difference method. Results:Compared with the SCI group, the SCI+NT-3 group exhibited significant improvement in BBB scores, reduced autophagy levels, increased Olig1 and MBP expression, and elevated TRAF6 ubiquitin ligase expression (all P<0.05). At 5 h post-OGD, immunofluorescence revealed reduced LC3B aggregation and near-normal oligodendrocyte morphology in the OGD+NT-3 group. Compared to the OGD, OGD+NT-3, and OGD+NT-3+UCHL1 groups, the OGD+NT-3+MG132 group demonstrated increased Ub-TrkC expression and markedly reduced autophagy levels at 5-7 h (all P<0.05). The OGD+NT-3+UCHL1 group exhibited lower Ub-TrkC expression and elevated autophagy levels compared to the OGD+NT-3 group (all P<0.05). Conclusion:NT-3 inhibits oligodendrocyte autophagy through TrkC receptor ubiquitination, thereby maintaining oligodendrocyte survival and promoting neurological recovery after SCI in rats.
4.Trajectory of intrinsic capacity and association with daily life ability in people aged 50 years and over in Shanghai
Jiaqi WANG ; Yanfei GUO ; Yan SHI ; Shuangyuan SUN ; Jiamin CAO ; Anli JIANG ; Yujun DONG ; Ye RUAN ; Fan WU
Chinese Journal of Epidemiology 2025;46(7):1209-1216
Objective:To identify the change trajectory of intrinsic capacity in people aged ≥50 years in Shanghai and explore the impact of intrinsic capacity trajectory change on overall function and dalily life activities in this population.Methods:The longitudinal data from round 1 to 3 Study of Global Ageing and Adult Health in Shanghai were used. The total intrinsic ability scores from five dimensions of cognition, psychology, sensory, vitality and locomotion were calculated. The censored normal model of group-based trajectory was used to identify the trajectory of intrinsic capacity change over time. Linear regression model and multivariate logistic regression model were used to analyse the effects of different levels intrinsic capacity trajectory on the scores of the WHO Disability Assessment Schedule (WHODAS), the activity of daily living (ADL) and the instrumental activities of daily living (IADL).Results:A total of 2 302 study participants aged ≥50 years with 3 round complete data were included in this study, and 3 levels of intrinsic capacity trajectory were identified, low-level trajectory (9.3%), medium-level trajectory (41.7%), and high-level trajectory (49.0%). Compared with the high-level group, the medium-level and low-level groups had higher WHODAS scores, which increased by 3.578 (95% CI: 2.028-5.129) and 12.620 (95% CI: 9.951-15.289), respectively, and those with more severe disability and those in the low-level group were at higher risk for severe difficulty in ADLs ( OR=12.450, 95% CI: 4.310-35.966) and IADLs ( OR=5.479, 95% CI: 1.311-22.904). Conclusions:Heterogeneity in trajectory of intrinsic capacity exists in people aged ≥50 years in Shanghai. Middle-aged and elderly people with low initial level and rapid decline trajectory of intrinsic capacity are at greater risk for the decline of daily life ability and the increase of disability. It is necessary to strengthen the long-term dynamic monitoring and evaluation of the change trajectory of intrinsic capacity in this population.
5.Chinese version of the Attitude Tool of Delirium Scale and its reliability and validity test
Yanfei SUN ; Mengxin XUE ; Sijiao HU ; Chengcheng FU ; Wenli JIANG ; Mengyao CAO ; Huajuan HOU
Chinese Journal of Practical Nursing 2025;41(3):191-197
Objective:To translate the English version of the Attitude Tool of Delirium (ATOD) into Chinese and test the reliability and validity of its application in Chinese nurses, and to provide an assessment tool for assessing nurses ′ attitudes towards delirium patients. Methods:After obtaining authorization from the source scale developer, the English version of the ATOD scale was translated, back-translated, expert-consulte, pre-surveyed and cross-culturally adapted according to the Brislin translation model. A questionnaire survey was conducted among 298 nurses with experience in caring for patients with delirium in three tertiary hospitals in Jiangsu Province using a convenience sampling method. The critical ratio value and correlation coefficient were used to analyze the scale items. Exploratory factor analysis was used to evaluate the structural validity of the scale, and experts were invited to evaluate the content validity of the scale. Cronbach α coefficient and test-retest reliability were used to evaluate the reliability of the scale. Results:The Chinese version of the ATOD scale contains 3 dimensions of cognitive attitudes, behavioral attitudes, and emotional attitudes toward patients with delirium, with a total of 23 entries. The Cronbach α coefficient for the entire scale was 0.896, with each dimension′s Cronbach α coefficient ranging from 0.614 to 0.912. The retest reliability of the scale was 0.868, with each dimension ′s retest reliability ranging from 0.603 to 0.927. Exploratory factor analysis extracted three eigenvalues with common factors greater than 1, and the cumulative variance contribution rate was 63.812%. Conclusions:The Chinese version of the ATOD scale has good reliability and validity, and can be used as an evaluation tool for evaluating nurses ′ attitudes towards delirium patients in China, so as to provide an effective basis for the formulation of corresponding interventions.
6.Structural content and psychometric properties of fundamental movement skills assessment scales for school-age children based on ICF-CY:a systematic review
Haoqi ZHANG ; Hua LIU ; Pu SUN ; Yanfei WEN ; Jiyue ZHANG ; Lu YANG
Chinese Journal of Rehabilitation Theory and Practice 2025;31(10):1172-1180
Objective To rexplore the content structure characteristics and psychometric properties of assessment scales for funda-mental movement skills(FMS)in school-aged children,based on International Classification of Functioning,Dis-ability and Health-Children and Youth Version(ICF-CY)framework.Methods Literatures on assessment scales for FMS in school-aged children were retrieved from PubMed,Science Di-rect,Web of Science,EMBase,PsycINFO,CNKI and Wanfang data from inception to July,2025.The contents of the included scales were analyzed using the ICF-CY linking rule.The COSMIN RoB tool was used to assess the psychometric properties of the scales,and the GRADE system was applied to evaluate the overall quality of evi-dence.Results A total of 29 studies were included,involving six assessment scales:Bruininks-Oseretsky Test of Motor Profi-ciency-2(BOT-2),Canadian Assessment of Movement Skill and Agility(CAMSA),K?rperkoordinationstest für Kinder(KTK),Movement Assessment Battery for Children-2(MABC-2),Motorische Basiskompetenzen test Battery(MOBAK),and Test of Gross Motor Development-3(TGMD-3).In the ICF-CY linking analysis,all six tools addressed joint mobility functions(b710)and joint stability functions(b715),while five of them also in-volved hand and arm use(d445).The number of linked items ranged from 5 to 11.BOT-2 and TGMD-3 linked to 11 items,showing broad coverage;BOT-2 focused more on the body function dimension,whereas TGMD-3 em-phasized activity and participation dimensions,especially the performance of hand function in daily activities.In bias risk assessment,TGMD-3 showed the lowest risk(50%rated A and 50%rated B),while MABC-2 had the highest proportion of C ratings(55.6%),followed by BOT-2(33.3%).In evidence grading,TGMD-3 was rated high quality,KTK moderate,BOT-2 and CAMSA low,and MABC-2 and MOBAK very low.Conclusion TGMD-3 is recommended as the primary tool for assessing FMS in school-aged children for broad coverage of ICF-CY items,strong psychometric properties and high evidence quality.KTK,with moderate evidence quali-ty,may serve as a secondary option,but should be used cautiously in China.Although CAMSA is easy to admin-ister,its validity and reliability are low,so it is only suitable for rapid classroom screening.BOT-2,despite cover-ing more ICF-CY items,has a higher bias risk and low evidence quality.MOBAK and MABC-2 have very low evidence quality and are not recommended for current use.
7.Structural content and psychometric properties of fundamental movement skills assessment scales for school-age children based on ICF-CY:a systematic review
Haoqi ZHANG ; Hua LIU ; Pu SUN ; Yanfei WEN ; Jiyue ZHANG ; Lu YANG
Chinese Journal of Rehabilitation Theory and Practice 2025;31(10):1172-1180
Objective To rexplore the content structure characteristics and psychometric properties of assessment scales for funda-mental movement skills(FMS)in school-aged children,based on International Classification of Functioning,Dis-ability and Health-Children and Youth Version(ICF-CY)framework.Methods Literatures on assessment scales for FMS in school-aged children were retrieved from PubMed,Science Di-rect,Web of Science,EMBase,PsycINFO,CNKI and Wanfang data from inception to July,2025.The contents of the included scales were analyzed using the ICF-CY linking rule.The COSMIN RoB tool was used to assess the psychometric properties of the scales,and the GRADE system was applied to evaluate the overall quality of evi-dence.Results A total of 29 studies were included,involving six assessment scales:Bruininks-Oseretsky Test of Motor Profi-ciency-2(BOT-2),Canadian Assessment of Movement Skill and Agility(CAMSA),K?rperkoordinationstest für Kinder(KTK),Movement Assessment Battery for Children-2(MABC-2),Motorische Basiskompetenzen test Battery(MOBAK),and Test of Gross Motor Development-3(TGMD-3).In the ICF-CY linking analysis,all six tools addressed joint mobility functions(b710)and joint stability functions(b715),while five of them also in-volved hand and arm use(d445).The number of linked items ranged from 5 to 11.BOT-2 and TGMD-3 linked to 11 items,showing broad coverage;BOT-2 focused more on the body function dimension,whereas TGMD-3 em-phasized activity and participation dimensions,especially the performance of hand function in daily activities.In bias risk assessment,TGMD-3 showed the lowest risk(50%rated A and 50%rated B),while MABC-2 had the highest proportion of C ratings(55.6%),followed by BOT-2(33.3%).In evidence grading,TGMD-3 was rated high quality,KTK moderate,BOT-2 and CAMSA low,and MABC-2 and MOBAK very low.Conclusion TGMD-3 is recommended as the primary tool for assessing FMS in school-aged children for broad coverage of ICF-CY items,strong psychometric properties and high evidence quality.KTK,with moderate evidence quali-ty,may serve as a secondary option,but should be used cautiously in China.Although CAMSA is easy to admin-ister,its validity and reliability are low,so it is only suitable for rapid classroom screening.BOT-2,despite cover-ing more ICF-CY items,has a higher bias risk and low evidence quality.MOBAK and MABC-2 have very low evidence quality and are not recommended for current use.
8.Chinese version of the Attitude Tool of Delirium Scale and its reliability and validity test
Yanfei SUN ; Mengxin XUE ; Sijiao HU ; Chengcheng FU ; Wenli JIANG ; Mengyao CAO ; Huajuan HOU
Chinese Journal of Practical Nursing 2025;41(3):191-197
Objective:To translate the English version of the Attitude Tool of Delirium (ATOD) into Chinese and test the reliability and validity of its application in Chinese nurses, and to provide an assessment tool for assessing nurses ′ attitudes towards delirium patients. Methods:After obtaining authorization from the source scale developer, the English version of the ATOD scale was translated, back-translated, expert-consulte, pre-surveyed and cross-culturally adapted according to the Brislin translation model. A questionnaire survey was conducted among 298 nurses with experience in caring for patients with delirium in three tertiary hospitals in Jiangsu Province using a convenience sampling method. The critical ratio value and correlation coefficient were used to analyze the scale items. Exploratory factor analysis was used to evaluate the structural validity of the scale, and experts were invited to evaluate the content validity of the scale. Cronbach α coefficient and test-retest reliability were used to evaluate the reliability of the scale. Results:The Chinese version of the ATOD scale contains 3 dimensions of cognitive attitudes, behavioral attitudes, and emotional attitudes toward patients with delirium, with a total of 23 entries. The Cronbach α coefficient for the entire scale was 0.896, with each dimension′s Cronbach α coefficient ranging from 0.614 to 0.912. The retest reliability of the scale was 0.868, with each dimension ′s retest reliability ranging from 0.603 to 0.927. Exploratory factor analysis extracted three eigenvalues with common factors greater than 1, and the cumulative variance contribution rate was 63.812%. Conclusions:The Chinese version of the ATOD scale has good reliability and validity, and can be used as an evaluation tool for evaluating nurses ′ attitudes towards delirium patients in China, so as to provide an effective basis for the formulation of corresponding interventions.
9.CGA-guided multidisciplinary intervention for frail non-dialysis elderly patients with chronic kidney disease
Yu'er LIANG ; Jing CHANG ; Yun GAO ; Yanfei WANG ; Qianmei SUN
Chinese Journal of Geriatrics 2025;44(4):490-497
Objective:To investigate the effects of Comprehensive Geriatric Assessment(CGA)-guided multidisciplinary interventions on frail non-dialysis elderly patients with chronic kidney disease, while also assessing the influence of different levels of frailty.Methods:This study is a randomized controlled trial conducted between 2020 and 2021, involving 230 frail, non-dialysis elderly patients with chronic kidney disease stages 3-5, treated at our hospital.Participants were randomly assigned to either an intervention group or a control group using a random number table method, with 115 patients in each group.The intervention group received multidisciplinary treatment over a period of 12 months, while the control group received standard care.We compared Fried frailty scores, re-hospitalization rates, and all-cause mortality between the two groups, and documented changes in CGA both before treatment and 12 months after treatment.Results:After 12 months of treatment, the Fried frail phenotype score was significantly lower in the intervention group(2.7±1.2)compared to the control group(3.6±1.8, t=97.47, P<0.01).Additionally, grip strength in the intervention group was higher(20.6±8.5 kg)than in the control group(13.5±8.1 kg, t=6.57, P<0.01).The scores for the Mini Nutritional Assessment-Short Form(MNA-SF)(10.7±4.0 vs.9.1±4.2, t=29.03, P<0.01), Mini-Mental State Examination Scale(MMSE)(24.3±8.6 vs.19.3±9.6, t=96.35, P<0.01), and Short Physical Performance Battery(SPPB)(6.8±3.2 vs.3.5±2.9, t=71.97, P<0.01)were also significantly higher in the intervention group.Furthermore, the Activity of Daily Living(ADL)score was greater in the intervention group(5.4±1.6)than in the control group(3.9±1.6, t=5.75, P<0.01), as was weight(67.2±11.2 kg vs.64.0±11.8 kg, t=2.02, P=0.045).The frailty reversal rate was significantly higher in the intervention group(32.2% vs.8.0%, χ2=21.4, P<0.01), and the all-cause mortality rate was lower in this group(11.3% vs.22.6%, χ2=5.22, P=0.022).However, there were no significant differences observed in the Geriatric Depression Scale(GDS)(6.3±3.7 vs.6.0±4.3, t=24.29, P>0.05), estimated Glomerular Filtration Rate(eGFR)[(44.1±19.2)ml·(min·1.73m 2) -1vs.(39.8±19.0)ml·(min·1.73m 2) -1, t=1.76, P>0.05], Instrumental Activity of Daily Living(IADL)(5.2±2.2 vs.4.6±2.2, t=1.49, P>0.05), and the rate of readmission(25.2% vs.36.5%, χ2=3.44, P>0.05). Conclusions:Multidisciplinary interventions derived from a comprehensive geriatric assessment can ameliorate or even reverse frailty, reduce all-cause mortality, and enhance the prognosis of frail elderly patients with chronic kidney disease stages 3 to 5 who are not undergoing dialysis.
10.Diagnostic and intervention value of implantable cardiac monitor in patients over 60 years of age with unexplained syncope
Rui WANG ; Yanfei ZHANG ; Hongchao ZHANG ; Jia WANG ; Shuhui SHEN ; Jiabin TONG ; Junpeng LIU ; You LYU ; Jia CHONG ; Zhilei WANG ; Xin JIN ; Lin SUN ; Xu GAO ; Yan DAI ; Jing LIANG ; Haitao LI ; Tong ZOU ; Jiefu YANG
Chinese Journal of Cardiology 2024;52(7):784-790
Objective:To investigate the value of implantable cardiac monitor (ICM) in the diagnosis and treatment of patients over 60 years old with unexplained syncope.Methods:This was a multi-center, prospective cohort study. Between June 2018 and April 2021, patients over the age of 60 with unexplained syncope at Beijing Hospital, Fuwai Hospital, Beijing Anzhen Hospital and Puren Hospital were enrolled. Patients were divided into 2 groups based on their decision to receive ICM implantation (implantation group and conventional follow-up group). The endpoint was the recurrence of syncope and cardiogenic syncope as determined by positive cardiac arrhythmia events recorded at the ICM or diagnosed during routine follow-up. Kaplan‐Meier survival analysis was used to compare the differences of cumulative diagnostic rate between the 2 groups. A multivariate Cox regression analysis was performed to determine independent predictors of diagnosis of cardiogenic syncope in patients with unexplained syncope.Results:A total of 198 patients with unexplained syncope, aged (72.9±8.25) years, were followed for 558.0 (296.0,877.0) d, including 98 males (49.5%). There were 100 (50.5%) patients in the implantation group and 98 (49.5%) in the conventional follow-up group. Compared with conventional follow-up group, patients in the implantation group were older, more likely to have comorbidities, had a higher proportion of first degree atrioventricular block indicated by baseline electrocardiogram, and had a lower body mass index (all P<0.05). During the follow-up period, positive cardiac arrhythmia events were recorded in 58 (58.0%) patients in the ICM group. The diagnosis rate (42.0% (42/100) vs. 4.1% (4/98), P<0.001) and the intervention rate (37.0% (37/100) vs. 2.0% (2/98), P<0.001) of cardiogenic syncope in the implantation group were higher than those in the conventional follow-up group (all P<0.001). Kaplan-Meier survival analysis showed that the cumulative diagnostic rate of cardiogenic syncope was significantly higher in the implantation group than in the traditional follow-up group ( HR=11.66, 95% CI 6.49-20.98, log-rank P<0.001). Multivariate analysis indicated that ICM implantation, previous atrial fibrillation, diabetes mellitus or first degree atrioventricular block in baseline electrocardiogram were independent predictors for cardiogenic syncope (all P<0.05). Conclusions:ICM implantation improves the diagnosis and intervention rates in patients with unexplained syncope, and increases diagnostic efficiency in patients with unexplained syncope.

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