To explain medium-term momentum and long-term reversal,we use the difference between the optional model and the CAPM model to construct a winner-loser portfolio.According to the CAPM model’s zero explanatory ability ...To explain medium-term momentum and long-term reversal,we use the difference between the optional model and the CAPM model to construct a winner-loser portfolio.According to the CAPM model’s zero explanatory ability with respect to stock market anomalies,we obtain an anomaly interpretative model.This study shows that this anomaly interpretative model can explain stock market perceptions and medium-term momentum.Most importantly,BM is a critical factor in the model’s explanatory ability.We present a robustness test,which includes selecting new sample data,adding new auxiliary variables,changing sample years,and adding industry fixed effects.In general,the BM effect does have considerable explanatory power in medium-term momentum and long-term reversal.展开更多
Many patients prioritize the ability to return to sports following shoulder replacement surgeries, including total shoulder arthroplasty(TSA), reverse total shoulder arthroplasty(RTSA), and hemiarthroplasty(HA). While...Many patients prioritize the ability to return to sports following shoulder replacement surgeries, including total shoulder arthroplasty(TSA), reverse total shoulder arthroplasty(RTSA), and hemiarthroplasty(HA). While activity levels after hip and knee replacements have been well-established in the literature, studies on this topic in the field of shoulder arthroplasty are relatively limited. A review of the literature regarding athletic activity after shoulder arthroplasty was performed using the PubMed database. All studies relevant to shoulder arthroplasty and return to sport were included. The majority of patients returned to their prior level of activity within six months following TSA, RTSA, and shoulder HA.Noncontact, low demand activities are permitted by most surgeons postoperatively and generally have higher return rates than contact sports or high-demand activities. In some series, patients reported an improvement in their ability to participate in sports following the arthroplasty procedure. The rates of return to sports following TSA(75%-100%) are slightly higher than those reported for HA(67%-76%) and RTSA(75%-85%). Patients undergoing TSA, RTSA, and shoulder HA should be counseled that there is a high probability that they will be able to return to their preoperative activity level within six months postoperatively. TSA has been associated with higher rates of return to sports than RTSA and HA,although this may reflect differences in patient population or surgical indication.展开更多
BACKGROUND Many patients prioritize the ability to return to work(RTW)after shoulder replacement surgeries such as total shoulder arthroplasty(TSA),reverse TSA(rTSA),and shoulder hemiarthroplasty(HA).Due to satisfacto...BACKGROUND Many patients prioritize the ability to return to work(RTW)after shoulder replacement surgeries such as total shoulder arthroplasty(TSA),reverse TSA(rTSA),and shoulder hemiarthroplasty(HA).Due to satisfactory clinical and functional long-term outcomes,the number of shoulder replacements performed will continue to rise into this next decade.With younger individuals who compose a significant amount of the workforce receiving shoulder replacements,patients will begin to place a higher priority on their ability to RTW following shoulder arthroplasty.AIM To summarize RTW outcomes following TSA,rTSA,and HA,and analyze the effects of workers’compensation status on RTW rates and ability.METHODS This systematic review and analysis was performed in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines.A literature search regarding RTW following shoulder arthroplasty was performed using four databases(PubMed,Scopus,Embase,and Cochrane Library),and the Reference Citation Analysis(https://www.referencecitationanalysis.com/).All studies in English relevant to shoulder arthroplasty and RTW through January 2021 that had a level of evidence I to IV were included.Nonclinical studies,literature reviews,case reports,and those not reporting on RTW after shoulder arthroplasty were excluded.RESULTS The majority of patients undergoing TSA,rTSA,or HA were able to RTW betweenone to four months,depending on work demand stratification.While sedentary or light demand jobs generally have higher rates of RTW,moderate or heavy demand jobs tend to have poorer rates of return.The rates of RTW following TSA(71%-93%)were consistently higher than those reported for HA(69%-82%)and rTSA(56%-65%).Furthermore,workers’compensation status negatively influenced clinical outcomes following shoulder arthroplasty.Through a pooled means analysis,we proposed guidelines for the average time to RTW after TSA,rTSA,and HA.For TSA,rTSA,and HA,the average time to RTW regardless of work demand stratification was 1.93±3.74 mo,2.3±2.4 mo,and 2.29±3.66 mo,respectively.CONCLUSION The majority of patients are able to RTW following shoulder arthroplasty.Understanding outcomes for rates of RTW following shoulder arthroplasty would assist in managing expectations in clinical practice.展开更多
基金I follow the tutor to do two fund projects which is the National Social Science Fund Project(15BJY164)the Ministry of Education Humanities and Social Sciences Fund Project(14YJA790034),respectively.
文摘To explain medium-term momentum and long-term reversal,we use the difference between the optional model and the CAPM model to construct a winner-loser portfolio.According to the CAPM model’s zero explanatory ability with respect to stock market anomalies,we obtain an anomaly interpretative model.This study shows that this anomaly interpretative model can explain stock market perceptions and medium-term momentum.Most importantly,BM is a critical factor in the model’s explanatory ability.We present a robustness test,which includes selecting new sample data,adding new auxiliary variables,changing sample years,and adding industry fixed effects.In general,the BM effect does have considerable explanatory power in medium-term momentum and long-term reversal.
文摘Many patients prioritize the ability to return to sports following shoulder replacement surgeries, including total shoulder arthroplasty(TSA), reverse total shoulder arthroplasty(RTSA), and hemiarthroplasty(HA). While activity levels after hip and knee replacements have been well-established in the literature, studies on this topic in the field of shoulder arthroplasty are relatively limited. A review of the literature regarding athletic activity after shoulder arthroplasty was performed using the PubMed database. All studies relevant to shoulder arthroplasty and return to sport were included. The majority of patients returned to their prior level of activity within six months following TSA, RTSA, and shoulder HA.Noncontact, low demand activities are permitted by most surgeons postoperatively and generally have higher return rates than contact sports or high-demand activities. In some series, patients reported an improvement in their ability to participate in sports following the arthroplasty procedure. The rates of return to sports following TSA(75%-100%) are slightly higher than those reported for HA(67%-76%) and RTSA(75%-85%). Patients undergoing TSA, RTSA, and shoulder HA should be counseled that there is a high probability that they will be able to return to their preoperative activity level within six months postoperatively. TSA has been associated with higher rates of return to sports than RTSA and HA,although this may reflect differences in patient population or surgical indication.
文摘BACKGROUND Many patients prioritize the ability to return to work(RTW)after shoulder replacement surgeries such as total shoulder arthroplasty(TSA),reverse TSA(rTSA),and shoulder hemiarthroplasty(HA).Due to satisfactory clinical and functional long-term outcomes,the number of shoulder replacements performed will continue to rise into this next decade.With younger individuals who compose a significant amount of the workforce receiving shoulder replacements,patients will begin to place a higher priority on their ability to RTW following shoulder arthroplasty.AIM To summarize RTW outcomes following TSA,rTSA,and HA,and analyze the effects of workers’compensation status on RTW rates and ability.METHODS This systematic review and analysis was performed in accordance with Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines.A literature search regarding RTW following shoulder arthroplasty was performed using four databases(PubMed,Scopus,Embase,and Cochrane Library),and the Reference Citation Analysis(https://www.referencecitationanalysis.com/).All studies in English relevant to shoulder arthroplasty and RTW through January 2021 that had a level of evidence I to IV were included.Nonclinical studies,literature reviews,case reports,and those not reporting on RTW after shoulder arthroplasty were excluded.RESULTS The majority of patients undergoing TSA,rTSA,or HA were able to RTW betweenone to four months,depending on work demand stratification.While sedentary or light demand jobs generally have higher rates of RTW,moderate or heavy demand jobs tend to have poorer rates of return.The rates of RTW following TSA(71%-93%)were consistently higher than those reported for HA(69%-82%)and rTSA(56%-65%).Furthermore,workers’compensation status negatively influenced clinical outcomes following shoulder arthroplasty.Through a pooled means analysis,we proposed guidelines for the average time to RTW after TSA,rTSA,and HA.For TSA,rTSA,and HA,the average time to RTW regardless of work demand stratification was 1.93±3.74 mo,2.3±2.4 mo,and 2.29±3.66 mo,respectively.CONCLUSION The majority of patients are able to RTW following shoulder arthroplasty.Understanding outcomes for rates of RTW following shoulder arthroplasty would assist in managing expectations in clinical practice.
