Objective:To develop the Suicide Outcomes Scale for Undergraduates with Suicidal Ideation(SO-SUSI)and test its validity and reliability.Methods:Based on semi-structured interview,literature review and expert discussion,main aspects and indicator system were defined.The initial version of SOSUSI was formed,and items were either modified from existing scales targeting the relevant constructs,or compiled according to previous inter-view results.A total of 607 undergraduates with suicidal ideation were enrolled.The sample was randomly divided in half,one half(n=317)was used for item analysis and exploratory factor analysis,and another half(n=290)for confirmatory factor analysis.All data were used for reliability analysis.The Self-rating Depression Scale(SDS)and Suicidal Intent(SI)were used for criterion validity.Results:The SOSUSI included 39 items in 4 dimensions(nega-tive reinforcement of suicide,negative consequences of suicide,loss of suicide,and positive reinforcement of sui-cide)which explained 50.10％of the total variance.Confirmatory factor analysis showed that the four-factor struc-ture model fitted well(x2/df=3.27,CFI=0.92,TLI=0.91,IFI=0.92,SRMR=0.09).The scores of negative re-inforcement and positive reinforcement of suicide were positively correlated with the SDS and SI scores(ICC=0.15-0.33,Ps＜0.05),while the scores of negative consequences and loss of suicide were negatively correlated with the SI scores(ICC=-0.42--0.56,Ps＜0.05).The Cronbach's α coefficients of each dimension ranged from 0.79 to 0.91.Conclusion:The Suicide Outcomes Scale for Undergraduates with Suicidal Ideation(SOSUSI)has good validity and internal consistency reliability.

Objective:To compare the efficacy of staged versus elective operation for treating acute closed fracture-dislocation of tarsometatarsal joint complex.Methods:A retrospective cohort study was used to analyze the clinical data of 26 patients with acute closed fracture-dislocation of tarsometatarsal joint complex admitted to Tongji Hospital of Tongji University from January 2017 to January 2021, of whom 18 were males and 8 were females, aged 32-52 years [(44.3±5.2)years]. According to the time from injury to admission, 14 patients admitted within 8 hours after injury underwent staged surgical treatment (staged group), and 12 patients admitted more than 8 hours after injury underwent elective surgery (elective group). In the staged group, emergency reduction and temporary internal fixation with K-wire were done under the supervision of a C-arm X-ray machine in the first stage, while after the swelling subsided, open reduction and internal fixation were done for tarsometatarsal joint fracture-dislocation in the second stage. In the elective group, open reduction and internal fixation were performed for tarsometatarsal joint fracture-dislocation on a scheduled basis after the swelling subsided. The operation time, hospitalization time and fracture healing time were recorded. The visual analogue score (VAS) and American Orthopedic Foot and Ankle Society (AOFAS) midfoot score were evaluated before operation, at 1, 6, 12 months after operation and at the final follow-up. The rate of complications was observed after operation.Results:All patients were followed up for 12-24 months [(18.5±3.8)months]. The operation time, hospitalization time and fracture healing time in the staged group were (77.3±5.6)minutes, (14.3±2.2)days and (12.3±1.2)weeks, respectively, significantly shorter than those in the elective group [(101.5±7.5)minutes, (20.3±5.2)days and (14.3±2.2)weeks] (all P<0.01). VAS significantly decreased and AOFAS midfoot score significantly increased in both groups as postoperative time increased (all P<0.05). There were no significant differences in VAS between the two groups before operation, at 12 months after operation or at the final follow-up (all P>0.05). The VAS at 1, 6 months after operation was (4.4±0.8)points and (2.1±0.4)points in the staged group, significantly lower than those in the elective group [(6.0±1.0)points and (3.5±0.6)points] (all P<0.01). There was no significant difference in preoperative AOFAS midfoot score between the two groups ( P>0.05). The AOFAS midfoot score at 1, 6, 12 months after operation and at the final follow-up was (67.6±4.5)points, (75.7±5.2)points, (83.6±2.2)points and (85.9±4.3)points in the staged group, significantly higher than those in the elective group [(60.2±3.9)points, (70.2±3.4)points, (75.4±3.3)points and (78.7±4.4)points] (all P<0.01). The rate of complications was 14.3% (2/14) in the staged group, significantly lower than that in the elective group [33.3% (4/12)] ( P<0.05). Conclusion:Compared to traditional elective surgery, staged surgery for acute closed fracture-dislocation of tarsometatarsal joint complex has the advantages of shortened operation time, hospitalization time and fracture healing time, eary pain relief, improved functional recovery of the foot and reduced postoperative complications.

Objective:To analyze the correlation between the posterior malleolus fracture and fixation and the rotational stability of the ankle and to explore the surgical indications for posterior malleolus fracture aiming to provide the theories for the diagnosis and treatment of disorder.Methods:Twenty fresh frozen cadaver specimens were selected. Further, the extent of the tibial insertion of the posterior inferior tibiofibular ligament (PITFL) and inferior transverse tibiofibular ligament (ITTFL) complex was dissected and measured. Based on the tibial insertion of the ligament complex, the model for the supination-external rotation degree 3 ankle fracture with a posterior malleolar fragment and syndesmosis diastasis was created. Moreover, the area threshold of the posterior tibial insertion of posterior malleolus fracture was biomechanically assessed. The difference of the antirotating ability of the ankle-stiffness between simple posterior malleolus fixation and simple syndesmotic fixation was analyzed statistically.Results:The PITFL and ITTFL were presented in all specimens with relatively broad in PITFL tibial insertion. The PITFL was attached to the posterolateral tibia. The distance between the highest point of the tibial insertion and the articular line was 45.2±5.6 mm, while the ITTFL was attached to the posterior distal tibia. The distance between the highest point of the tibial insertion and the articular line was 5.5±1.0 mm. The width of the tibial insertion of the PITFL and ITTFL complex decreased as the distance from the joint line increased. Biomechanical analysis showed that the threshold of posterior area of posterior malleolus fracture was 1/4S. The stiffnesses of posterior malleolus fixation and syndesmosis stabilization were 0.264±0.080 N·m/° and 0.164 ± 0.061 N·m/°, respectively. The percentage of stiffness restored by posterior ankle fixation was 60.9%±10.2%, which was greater than that by syndesmosis stabilization 37.5%±7.9% ( t=17.09, P<0.001) . Conclusion:The surgical technique for posterior malleolus fracture should consider restoration of the axial and rotational stability of the ankle simultaneously. Posterior malleolus fracture fixation is recommended when the syndesmosis is unstable with the area ratio of posterior tibial insertion of posterior malleolus fracture greater than or equal to 1/4. Syndesmotic fixation is proposed to restore and maintain the rotational stability of the ankle when the syndesmosis is unstable with the area ratio less than 1/4. Regardless of the area ratio, the surgical indications for stable syndesmosis depend on the impact of the posterior malleolus fracture on the axial stability of tibiotalar joint, on the involved articular surface area and on the displacement degree of posterior malleolus fragment.

Objective:To propose a new classification of posterior malleolus fracture to further clarify its pathoanatomy.Methods:Twenty fresh frozen cadaver specimens of normal morphology of lower limbs were selected and dissected and the extent of the tibial insertion of posterior malleolus associated ligaments was measured. At the same time, a retrospective case series analysis was made on the clinical and CT information of 296 patients with posterior malleolus fracture treated at Tongji Hospital of Tongji University from January 2012 to July 2020 or at Karamay Central Hospital from January 2018 to July 2020. The percentage of articular involvement of the fracture, proximal displacement of the posterior malleolus fracture and extent of posterior talar subluxation were measured. A clinically practical new classification system for posterior malleolus fracture was created by correlating posterior malleolus associated ligaments with CT images of posterior malleolus fracture. The new classification included three types: type I was posterior malleolus fracture with only the tibial insertion of inferior transverse tibiofibular ligament involved; type II was posterior malleolus fracture with both the tibial insertions of inferior transverse tibiofibular ligament and posterior inferior tibiofibular ligament involved, which was divided into subtypes IIA and IIB based on the presence of articular cartilage and subchondral bone damage, compression or Die-Punch fragments; type III was posterior malleolus fracture that involved all the tibial insertions of inferior transverse tibiofibular ligament, posterior inferior tibiofibular ligament and posterior tibiotalar ligament, which was sub-classified into subtypes III A and III B according to number of fracture fragments. Anatomic characteristics of the extent of the tibial insertion of posterior malleolus associated ligament, CT imaging parameters for posterior malleolus fracture and corresponding fracture typing were determined. In addition, the new classification system for posterior malleolus fracture was compared with Haraguci classification and Mason classification.Results:Posterior malleolus associated ligaments included the posterior inferior tibiofibular ligament, inferior transverse tibiofibular ligament and posterior tibiotalar ligament from posterolateral to posteromedial tibia. The posterior inferior tibiofibular ligament was attached to the posterolateral tibia and the distance between the highest point of its tibial insertion and the joint line was (45.2±5.6)mm. The inferior transverse tibiofibular ligament was attached to the posterior distal tibia and the distance between the highest point of its tibial insertion and the joint line was (5.5±1.0)mm. The posterior tibiotalar ligament was attached to the posterior colliculus and intercollicular groove of the medial malleolus and the distance between the center of its tibial insertion and the intercollicular groove was (2.5±0.6)mm. Among 296 patients with posterior malleolus fracture, there were 36 patients with type I, 229 with type II (150 type IIA, 79 type IIB) and 31 with type III (11 type IIIA, 20 type IIIB). The percentage of articular involvement of the fracture, proximal displacement of posterior malleolus fracture and extent of posterior talar subluxation in type IIB fracture were significantly greater than those in type II A fracture [23.7(18.6, 28.8)% vs. 18.4(12.7, 21.7)%, 4.1(2.1, 6.0)mm vs. 1.9(0.2, 3.0)mm, 4.7(1.5, 6.2)mm vs. 2.3(1.1, 3.0)mm] (all P<0.01). The proximal displacement of posterior malleolus fracture and extent of posterior talar subluxation in type III fracture were significantly greater than those in type II fracture [7.2(6.0, 8.2)mm vs. 2.7(0.4, 4.0)mm, 10.1(6.0, 15.0)mm vs. 3.1(1.1, 5.0)mm] (all P<0.01). The new classification for posterior malleolus fracture combined the posterior malleolus ligament and injury mechanism of posterior malleolus fracture as compared with Haraguchi classification, which not only further detailed the classification, but also was more practical in clinic for increased the severity of injury was elevated with higher classification level. The new classification was more comprehensive as compared with Mason classification for it mainly added the type of simple-rotation-type posterior malleolus fracture (type IIA of the new classification). Conclusions:In combination with posterior malleolus associated ligaments, injury mechanism and fracture morphology, posterior malleolus fracture is divided into three types. The new classification system more comprehensively describes pathoanatomy of posterior malleolus fracture that contributes to related basic research and clinical diagnosis and treatment.

Objective:To investigate the efficacy of TiRobot navigation combined with ankle arthroscopy in the reduction and internal fixation of Hawkins type Ⅱ talus neck fracture.Methods:From January 2019 to September 2020, a total of 13 patients with Hawkins type Ⅱ talus neck fracture were admitted to Department of Foot and Ankle Surgery, Xuzhou Renci Hospital. They were 8 males and 5 females, with a mean age of 35.8 years (from 22 to 61 years). All fractures were reduced and fixated using TiRobot navigation combined with ankle arthroscopy. Time for fracture reduction assisted by intraoperative arthroscopy, time for internal fixation assisted by TiRobotic navigation, fracture union time and complications were recorded. The American Orthopaedic Foot and Ankle Society (AOFAS) ankle-hindfoot score was used at the last follow-up to evaluate the functional outcomes.Results:All the operations were finished within 2 hour. The primary screw placement succeeded in all. The time for fracture reduction assisted by intraoperative arthroscopy averaged 52.8 min (from 43 to 66 min) and the time for internal fixation assisted by TiRobotic navigation 43.6 min (from 33 to 55 min). All the patients were followed up for an average 13.3 months(from 12 to 15 monhs). They obtained bony union within 3 months. One patient developed traumatic subtalar arthritis with mild pain and was treated conservatively. None of the patients had complications like incision infection or talus necrosis. The average AOFAS ankle-hindfoot score was 91.0 points (from 83 to 94 points) at the last follow-up.Conclusion:In the reduction and internal fixation of Hawkins type Ⅱ talus neck fracture, TiRobot navigation combined with ankle arthroscopy shows advantages of minimal invasion, accurate reduction and screw placement, and limited complications, leading to fine short-term functional outcomes.

Objective: To understand the prevalence and distribution of learning disabilities among middle school students in Beijing. Methods: By using stratified random cluster sampling, 6 365 students in grade one and grade two of 12 public middle schools in urban and rural in Beijing were selected. Criteria for learning disabilities included the following: on campus healthy students without serious physical and mental diseases and normal IQ assessed by combined Raven intelligence test; positive in the teacher rated Screening Scale for Middle School Students with Learning Disabilities; percentile ranking (below the bottom 10% percentile of grade) of the academic performance in the Chinese, mathematics and English tests. Results: The learning disabilities of the subjects were determined by the teachers and it was found that the score of words reading, reading understanding, words spell, written expression, number calculation, mathematical reasoning and the total score of the scale were respectively (20.78±4.00, 18.16 ±4.35, 21.50±3.89, 20.06±3.92, 21.12±5.23. 18.67±5.35, 120.28±19.99) points. There were differences in the total score of learning ability between urban and rural areas, gender and grade. Urban area was better than rural area, girls were better than boys, and junior two students were better than junior one students( t=12.94, 9.94, 3.07, P <0.05). A total of 445(7%) students with learning disabilities were detected. Reading disabilities accounted for 5.0%, dysgraphia 2.7% and math disabilities 4.6%. Prevalence of learning ability differed by urban rural regions, gender and grade, with girls and students from urban areas and grade two being significantly lower( t =12.94, 9.94, 3.07, P <0.05). Conclusion The prevalence of learning disabilities in middle school students is high, which needs more attention.

Objective:To explore the reliability and validity of the Chinese version of the Barkin Index of Maternal Functioning (BIMF) in Chinese parturients.Methods:The Chinese version of the BIMF was formed through translation, back translation and cultural adjustment. From December 2019 to May 2020, convenience sampling was used to select 189 parturients from a ClassⅢ Grade A hospital in Chongqing to conduct a questionnaire survey to evaluate the reliability and validity of the Chinese version of the scale.Results:The Cronbach's α coefficient, split-half reliability and the test-retest reliability of the Chinese version of the BIMF was 0.834, 0.876 and 0.813 respectively. The content validity index of the scale was 0.864. Exploratory factor analysis extracted a total of 5 factors, and the cumulative variance contribution rate was 60.43%. Confirmatory factor analysis showed that the model fitted well. The final scale included 5 dimensions and 16 items.Conclusions:The Chinese version of the BIMF has good reliability and validity, which can be used as a measurement tool for maternal physical and mental health, and can provide a reference for formulating postpartum nursing and transitional nursing care.

Objective: Understanding mental health status of students with learning disabilities in Beijing to provide a basis for mental health promotion of students with learning disabilities. Methods: By means of random cluster sampling, 5 787 enrolled students in grade one and grade two of 11 public junior middle schools in Beijing were selected as the survey subjects. A self designed questionnaire was used to investigate the students’ learning disabilities and mental health status through anonymous self filling. Results: About 11.6% students self reported learning disabilities. The proportions of students with learning difficulty in mathematical reasoning and calculation were higher, 44.1% and 40.7% respectively. The reported rate of mental health problems was 38.3%. The top four of the 10 symptoms were obsessive compulsive symptoms, learning pressure, emotional instability and anxiety(2.19±0.77)(2.17±0.99)(2.09±0.90)(2.07±1.08). Compared with students without learning disabilities, students with self reported learning disabilities had poorer mental health status(OR=1.47), and learning disabilities were related to most factors of mental health. Different types of learning disabilities were associated with different mental health factors. Conclusion Mental health problems of students with learning disabilities are higher than that of students without learning disabilities. It is necessary to strengthen the mental health support for students with learning disabilities and improve their mental health.

Objective:To observe the effectiveness of bone cement-enhanced proximal femoral nail antirotation (PFNA) in the treatment of severe osteoporotic intertrochanteric fracture.Methods:Between January 2016 and June 2017, 23 patients with severe osteoporotic intertrochanteric fracture were treated with bone cement-enhanced PFNA at Department of Orthopaedics, The Second Affiliated Hospital to Luohe Medical College. They were 9 men and 14 women with an average age of 85.3 years (range, from 80 to 91 years). According to AO/OTA-2018 classification, there were 2 cases of type 31-A1.3, 5 cases of type 31-A2.2, 13 cases of type 31-A2.3 and 3 cases of type 31-A3.3. According to Singh standard grading, 4 cases were rated as level 1, 16 cases as level 2 and 3 cases as level 3. The PFNA fixation was enhanced by bone cement in all. The operation time, amount of intraoperative bleeding, postoperative complications, fracture healing time and hip Harris scores at the last follow-up were recorded.Results:The operation time averaged 56.3 minutes (range, from 47 to 91 minutes) and the amount of intraoperative bleeding 197 mL (range, from 110 to 450 mL). All patients were followed up for 5 to 27 months (mean, 14.7 months). One patient who had been rated as good by the Harris hip score died 5 months after surgery because of acute suppurative obstructive cholangitis. All the 23 fractures achieved bony union. The healing time averaged 11.3 weeks (range, from 8 to 18 weeks). By the Harris scores at the last follow-up, 11 cases were excellent, 10 cases good and 2 cases fair, giving an excellent and good rate of 91.3%.Conclusion:Bone cement-enhanced PFNA can bring about good short-term outcomes for severe osteoporotic intertrochanteric fractures because it can improve the screw control and reduce the risk of internal fixation failure.