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OBJECTIVE@#To investigate the association between educational attainment and the onset of disability in activities of daily living (ADL), and to explore the mediating effect of social participation on such association.@*METHODS@#A longitudinal dataset was drawn from the China Health and Retirement Longitudinal Study (CHARLS, 2015 to 2018). The measurements of educational attainment, social participation and other covariates were identified from 2015, while the outcome measurement of ADL disability was constructed with data from survey 2018. Descriptive analyses were conducted, and basic characteristics and social engagement of the respondents were compared between illiterates and non-illite-rates using Chi-square test. Logistic regression was used to investigate the associations of educational attainment and social participation on the onset of ADL disability. Mediation analysis was employed to examine the mediator role of the social participation on the linkage from being illiterate to the ADL disability onset.@*RESULTS@#A total of 11 359 adults aged 45 years and above were included in the sample, of whom 3 222 were illiterates. The incidence of the onset of ADL disability of illiterates and non-illiterates were 10.4% and 6.2%, respectively. Among these respondents, only half of them were involved in social activities. Of all the 8 social activities, the percentage of interacting with friends (34. 1%) was the highest, and the lowest percentage was observed in participating in an educational or training course (0.6%). Moreover, the percentages of participation in all these 8 social activities among illiterates were significantly lower than that of their educated counterparts (all P < 0.001). The illiterate middle-aged and older adults were less likely to develop ADL disability in the follow-up period [adjusted odds ratio (aOR)=1.22, 95%CI: 1.02-1.45], and social participation was significantly associated with ADL disability onset (aOR=0.73, 95%CI: 0.63-0.85). Findings from mediation analysis illustrated that social participation accounted for 12.22% of the adverse effect of being illiterate on ADL disability onset.@*CONCLUSION@#Social participation could buffer the negative effect of being illiterate on ADL disability onset in middle-aged and older adults, suggesting that engagement in social activities might have impact on prevention of impairments in physical function, especially for middle-aged and older illiterates.
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Aged , Humans , Middle Aged , Activities of Daily Living , China/epidemiology , Disabled Persons , Longitudinal Studies , Social ParticipationABSTRACT
Objective To explore the therapeutic effect and application value of the self-made spinal positioning equipment and percutaneous pedicle screw fixation system in the treatment of thoracic and lumbar fracture. Methods To determine the fractured vertebra and pedicle screws entrance point with spinal positioning equipment, 67 patients with thoracic and lumbar fractures were performed percutaneous pedicle screw fixation by using self-made percutaneous pedicle screw fixation system. By contrasting the perioperative indicators, and imaging indicators, to evaluate the therapeutic effect and application value of the system. Results For the spinal positioning equipment, the location time were (15.85±2.45) min and the location accuracy were 95.03%±3.27%. But for the open reduction internal fixation, the location time were (35.46±5.39) min and the location accuracy were 94.02%±2.95%. There was no significant difference in location accuracy, but were significant differences in location time (P＜0.05). Percutaneous pedicle screw fixation had the same effect on three sides with open reduction internal fixation in vertebral height restore,kyphosis deformity and correction and lumbar spinal stenosis's correction. The perioperative indicators of the preoperative and postoperative grope had significant difference (P＜0.05). There were significant differences in all perioperative indicators between the percutaneous pedicle screw fixation and the open reduction internal fixation (P＜0.05). Conclusion The spinal positioning equipment is helpful to determine the fractured vertebra and pedicle screws entrance point accurately and reduce the radiation. The percutaneous pedicle screw fixation system has the advantage of convenient manipulation and accurate implantation. The system can not only reduce surgical damage and post-operation reaction but also make patients recover quickly and face less complications.
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<p><b>OBJECTIVE</b>To investigate whether Ca2+ contribute to cardiomyocyte hypertrophy induced by tumor necrosis factor-alpha (TNF-alpha) through PI3-kinase pathway.</p><p><b>METHODS</b>The protein content was assayed with Lowry's method. The cardiomyocytes volumes were measured by computer photograph analysis system. The protein synthesis was assayed with [3H]-leucine incorporation method. [Ca2+]i transient was measured by Till image system by cell-loading Fura-2/AM.</p><p><b>RESULTS</b>(1) TNF-alpha significantly induced the increase of protein content, [3H]-leucine incorporation and cell size. These responses were significantly suppressed by LY294002, a selective PI3-kinase inhibitor. Verapamil, L-type calcium channels antagonist, slightly attenuated TNF-alpha-induced these responses. (2) TNF-alpha increased the amplitude of the spontaneous Ca2+ transients in cultured ventricular myocytes from the neonatal rat; PI3-kinase inhibitor LY294002 could suppress the elevation induced by TNF-alpha, but calcium antagonist verapamil took the minor effects of TNF-alpha on [Ca2+]i metabolism.</p><p><b>CONCLUSION</b>Increasing the intercellular free Ca2+ level may play an essential role in TNF-alpha-induced cardiomyocyte hypertrophy through PI3-kinase pathway in rats, while L-type calcium channel takes the minor effects on it.</p>
Subject(s)
Animals , Female , Male , Rats , Calcium , Metabolism , Calcium Channels, L-Type , Metabolism , Chromones , Pharmacology , Hypertrophy , Morpholines , Pharmacology , Myocytes, Cardiac , Metabolism , Pathology , Phosphatidylinositol 3-Kinases , Metabolism , Rats, Sprague-Dawley , Signal Transduction , Tumor Necrosis Factor-alpha , PharmacologyABSTRACT
[Objective]To explore the treatment of intertrochanteric fracture with expandable proximal femoral nail and prevention and cure of some related complications.[Method]Fifty-eight cases of closed intertrochanteric fracture,including 28 male cases and 30 female,average 73.2 years old(range from 42 to 88)accepted treatment.The type of fracture according to Evans classification:5 cases were type Ⅰ,7 were type Ⅱ,28 were type Ⅲ,13 were type Ⅳ,and 5 were type Ⅴ.All cases were treated with expandable proximal femoral intramedullary nail after close reduction.[Result]Thirty-eight cases were followed up,from 12 to 36 months,average 18.5 months,all of the cases got clinical healing after 8-10 weeks postoperatively.Hip Harris score average was 91.8.Some complications occurred in 6 cases:1 case had secondary fracture nearby the greater trochanter needling insertion point,1 case femoral head peg was outside of the lock hole,and 1 case femoral head peg tip was broken during operation.And after operation,1 case had coxa vara deformation,1 case had femoral middle and superior segment fracture,and 1 case femoral head peg was exited.[Conclusion]Expandable proximal femoral intramedullary nail has some advantages as:minimal invasive,manipulation convenient,fixation reliability,remove easily,but surgeons must be familiar with the construction and fixation principle of the nail in the primary stage,and perform the operating instruction strictly,to reduce or avoid the complications occurrence because of mis-manipulation.
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[Objective]To investigate the restoration of the axial alignment of the lower extremity during operation for fracture of tibia plateau and to assess the curative effect.[Method]A retrospective analysis of 45 cases of fracture of tibial plateau were conducted from May 2000 to June 2005,25 male cases and 20 female,mean age were 45.3.The type of fracture:3 cases were Schatzker I,10 were type Ⅰ,19 were type Ⅲ,6 were type Ⅳ,5 were type Ⅴ,2 were type Ⅵ.All cases were treated with open reduction,bone graft and internal-fixation with plate and screw under arthroscopy-assisted,and the normal axial alignment of the lower extremity was restored.The restoration standard was in accordance with the uninjured side limb.The way of measurement:the axial line from anterior superior iliac to interdigit of the first and second toe was done,then,the perpendicular distance from the center of patella to this line was calculated,and compared the data with uninjured side limb's.[Result]Forty cases were followed up,from 6 months to 24 months,average 15 months,according to the Rasmussen knee score standard,24 were excellent,11 were good,3 were fair and 2 were poor.The satisfactory rate was 87.5%,the restoration of knee function were close correlated with whether the line normal or not,there were abnormal lines recurrence in some cases,the main causes were:(1)Meniscus to be cut excessive to the loading redistribution in joint;(2)The reduced articular surface collapsed,again due to the affected limb weight loading too early;(3)Fractures were too complicated to be compress fixed with common buttress plate,resulted in displace fracture.[Conclusion]It is very important that the axial alignment of the lower extremity to be corrected during operation to the injured knee function restoration after operation,and the causes result in the axial line abnormal above-mentioned should be considered thoroughly,at the same time,the corresponding measures should be taken.
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Objective To investigate the clinical application and therapeutic effect of reservation cortical expand resection and reconstruction for extremities bone tumor. Method Twelve cases with extremities invasion bone tumor were reviewed,including 6 male and 6 female.The average age was 37.1 years old.According to the MRI,TypeⅠtumor located in metaphysic and growth eccentricity,and was treated with outside tumor osteotomy with reservation of one side as integumentale,the cut line was shape of "匚".Type Ⅱ tumor was with invasion part articular surface,and was operated with part joint osteotomy with reservation of one side as integumentale,the cut line was shape of"L".Type Ⅲ was with invasion total joint surface and as integmentale,all tumor segment including joint could be cut,but the shape of cut close to the diaphysis was echelonment. Result The operation time was 1~3 h,the operative bleeding quantity were 150~400 ml,all incisions were obtained primary healing.Twelve cases were followed up from 6 months to 8 years.The average extremity functional score according to the system of ISOLS(International Society of Limb Salvage):upper extremity was 22.3 and the lower was 25.3 The average bone healing time of returned deactivation bone graft and bone allograft healing with the osteotomy plane was 3 months,original tumor recurrence in local was 1,the recurrence rate was 7.69%,no malignant change and metabasis was found. Conclusion The reservation cortical expand resection and reconstruction could increase the treatment effect of extremities bone tumor,it is key to decrease the recurrence with strict indication,non-neoplasma and aseptic technique.Tumor shell and osteotomy plane should be deactivated thoroughly.
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[Objective]To explore the clinical effects of titanium plate and morselized hone grafting for the treatment of severe acetabular hone defect.[Method]A total of 27 patients with acetabular defects were treated with this procedure.According to AAOS,the acetabular defects were classified into various types:type Ⅰ in 6 cases,type Ⅱc in 4 and type Ⅲ in 17.The average preoperation Harris score were 37.The postoperative effect should be evaluated by clinical and X-ray manifestations.[Result]All patients were adopted this method to reconstruct the acetabular bone defects.The prosthetic dislocation was found in one case after operation,which was resulted from over-anteverted titanium plate impacted the greater trochanter.The part of trochanteric bone and impact factors were removed to healing.No complications were found in other patients.The average following up was 3 years and average Harris score was 87.The X-ray showed that none of the patients was presented the radiolucent lines in the acetabular mattress,bone transplantation,reconstructive titanium plate and interface of polyethylene liner.[Conclusion]The titanium plate and morselized bone grafting can repair the acetabular bone defects effectively and provide a solid initial fixation for prosthesis and restore the role of rotational center of hip.
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[Objective]To explore the clinical indication and effectiveness of anterolateral mini-incision for the total hip replacement (THR).[Method]A retrospective analysis of the 34 cases of anterolateral mini-incision was conducted from May 2002 to March 2005,among the patients 23 suffered from displaced femoral neck fractures and 11 suffered from femoral head aseptic necrosis.[Result]All the patients were followed up for 12～36 months with an average of 18 months.The obvious advantages of anterolateral mini-incision for the total hip replacement were as following:less blood loss in operation,less post-operative pain and complications,and early rehabilitation training,without cinch and subsidence in X-ray.Harris score was 92.1 point.[Conclusion]Anterolateral mini-incision for the total hip replacement can be used as an effective method to treat the patients who were extenuation,without abnormalities of hip joint,deossification and osteoporis.Appropriate incision combined with precise procedure can reduce the operative trauma and speed up functional recovery.