scholarly journals The patellofemoral morphology and the normal predicted value of tibial tuberosity-trochlear groove distance in the Chinese population

2021 ◽  
Vol 22 (1) ◽  
Author(s):  
Zhe Li ◽  
Guanzhi Liu ◽  
Run Tian ◽  
Ning Kong ◽  
Yue Li ◽  
...  
Keyword(s):  
Individual Differences ◽  
Chinese Population ◽  
Pearson Correlation ◽  
Three Dimensional ◽  
Correlation Coefficients ◽  
Tibial Tuberosity ◽  
Trochlear Groove ◽  
Lasso Regression ◽  
Cross Sectional ◽  
Anterior Posterior

Abstract Background Our objective was to obtain normal patellofemoral measurements to analyse sex and individual differences. In addition, the absolute values and indices of tibial tuberosity-trochlear groove (TT-TG) distances are still controversial in clinical application. A better method to enable precise prediction is still needed. Methods Seventy-eight knees of 78 participants without knee pathologies were included in this cross-sectional study. A CT scan was conducted for all participants and three-dimensional knee models were constructed using Mimics and SolidWorks software. We measured and analysed 19 parameters including the TT-TG distance and dimensions and shapes of the patella, femur, tibia, and trochlea. LASSO regression was used to predict the normal TT-TG distances. Results The dimensional parameters, TT-TG distance, and femoral aspect ratio of the men were significantly larger than those of women (all p values < 0.05). However, after controlling for the bias from age, height, and weight, there were no significant differences in TT-TG distances and anterior-posterior dimensions between the sexes (all p values > 0.05). The Pearson correlation coefficients between the anterior femoral offset and other indexes were consistently below 0.3, indicating no relationship or a weak relationship. Similar results were observed for the sulcus angle and the Wiberg index. Using LASSO regression, we obtained four parameters to predict the TT-TG distance (R2 = 0.5612, p < 0.01) to achieve the optimal accuracy and convenience. Conclusions Normative data of patellofemoral morphology were provided for the Chinese population. The anterior-posterior dimensions of the women were thicker than those of men for the same medial-lateral dimensions. More attention should be paid to not only sex differences but also individual differences, especially the anterior condyle and trochlea. In addition, this study provided a new method to predict TT-TG distances accurately.

scholarly journals The Three-Dimensional Morphology of the Patellofemoral Joint and the Normal Predicted Value of Tibial Tuberosity-Trochlear Groove Distance In Chinese Population

2020 ◽  
Author(s):  
Zhe Li ◽  
Guanzhi Liu ◽  
Run Tian ◽  
Ning Kong ◽  
Yue Li ◽  
...  
Keyword(s):  
Pearson Correlation ◽  
Three Dimensional ◽  
Correlation Coefficients ◽  
Cross Sectional Study ◽  
Tibial Tuberosity ◽  
Trochlear Groove ◽  
Lasso Regression ◽  
Cross Sectional ◽  
P Values ◽  
Anterior Posterior

Abstract Our objective was to obtain normal patellofemoral measurements so as to provide a reference for prosthetic design. Besides, the absolute values and indices of TT-TG distances are still controversial in clinical application. A better method to enable precise clinical applications is still needed.Methods:78 knees of 78 subjects without knee pathologies were included in this cross-sectional study. A CT scan was obtained from all subjects and three-dimensional knee models were constructed using Mimics and SolidWorks software. We measured and analyzed 19 parameters including TT-TG distance and dimensions and shapes of patella, femur, tibia, and trochlea. LASSO regression was used to predict the normal TT-TG distances.Results:The dimensional indexes, TT-TG distance, and femoral aspect ratio of the males were significantly larger than those of females (all P values <0.05). However, after controlling the bias from age, height, and weight, there were no significant differences in TT-TG distances, PAL, and anterior-posterior dimensions between genders (all P values >0.05). The Pearson correlation coefficients between the AFO and other indexes were consistently below 0.3, indicating a none or weak relationship. Similar results were observed for the SA and the Wiberg index. Using LASSO regression, we obtained four parameters to predict TT-TG distance (R2=0.5612, P<0.01) to achieve the optimal accuracy and convenience. Conclusion:The anterior-posterior dimensions of the females were thicker than those of males for the same medial-lateral dimensions. More attention should be paid to not only gender differences but individual differences, especially the anterior condyle and trochlea. Besides, this study provided a new method of predicting TT-TG distance to enable precise clinical diagnoses and guide the medial transfer of the tibial tuberosity.

scholarly journals Relationships between Hip Flexibility and Pitching Biomechanics in Adolescent Baseball Pitchers

2021 ◽  
Author(s):  
Maxwell L. Albiero ◽  
Wesley Kokott ◽  
Cody Dziuk ◽  
Janelle A. Cross
Keyword(s):  
External Rotation ◽  
Pearson Correlation ◽  
Three Dimensional ◽  
Correlation Coefficients ◽  
Kinematic Chain ◽  
Abduction Angle ◽  
Cross Sectional ◽  
Flexion Extension ◽  
Hip Abduction ◽  
Baseball Pitchers

Abstract Context: Inadequate hip active range of motion (AROM) may stifle the energy flow through the kinematic chain and decrease pitching performance while increasing the risk for pitcher injury. Objective: To examine the relationship of hip AROM and pitching biomechanics during a fastball pitch in adolescent baseball pitchers. Design: Cross-Sectional study. Setting: Biomechanics laboratory. Participants: A voluntary sample of 21 adolescent baseball pitchers (16.1 ± 0.8 yrs.; 183.9 ± 5.2 cm; 77.9 ± 8.3 kg). Main Outcome Measure (s): Bilateral hip internal rotation (IR), external rotation (ER), flexion, extension, and abduction AROM were measured. Three-dimensional biomechanics were assessed as participants threw from an indoor pitching mound to a strike zone net at regulation distance. Pearson correlation coefficients were used to determine correlations between hip AROM and biomechanical metrics. Results: Statistically significant negative correlations were found at foot contact between back hip ER AROM and back hip abduction angle (p=0.030, r=−0.474), back hip ER AROM and torso rotation angle (p=0.032, r=−0.468),and back hip abduction AROM and lead hip abduction angle (p=0.037, r=−0.458). Back hip extension AROM was positively correlated with increased stride length (p=0.043, r=0.446). Lead hip abduction AROM was also positively correlated with normalized elbow varus torque (p=0.034, r=0.464). Conclusions: There were several relationships between hip AROM and biomechanical variables during the pitching motion. The findings support the influence hip AROM can have on pitching biomechanics. Overall, greater movement at the hips allows for the kinematic chain to work at its maximal efficiency, increasing pitch velocity potential.

Leader-Member Exchange (LMX) Impact on Work-Home Interference in a South African Commuter Transport Engineering Company

2019 ◽  
Vol 43 ◽  
Author(s):  
Jan Christoff Visagie ◽  
Michael M. Jones ◽  
Herman L. Linde
Keyword(s):  
South African ◽  
Structural Equation ◽  
Pearson Correlation ◽  
Correlation Coefficients ◽  
Leader Member Exchange ◽  
Negative Consequences ◽  
Dyadic Relationship ◽  
Cross Sectional ◽  
Engineering Company ◽  
Member Exchange

The South African workplace is confronted with many leadership challenges, specifically those relating to the employment relationship between subordinates and their supervisors. A high-quality relationship is essential, considering the work-family spillovers employees experience. Limited research has been conducted on the potential positive and negative consequences of the leader-member exchange (LMX) dyadic relationship. In this study, we used a cross-sectional research design, and drew an employee sample (N = 120) from a commuter transport engineering company. A five-point Likert scale was employed and statistical analyses were carried out using the SAS statistical program. We calculated Pearson correlation coefficients and used structural equation modelling to test the proposed conceptual model to indicate possible correlations between the different variables. The main finding of the study was that the nature of the LMX relationship quality in the relevant company appeared to be high and positively related to work-home enrichment but negatively related to work-home conflict and role overload. The article concludes by making a number of suggestions to respond to challenges.

scholarly journals A Quantitative Comparison of Multispectral Refraction Topography and Autorefractometer in Young Adults

2021 ◽  
Vol 8 ◽  
Author(s):  
Yunru Liao ◽  
Zhenlan Yang ◽  
Zijing Li ◽  
Rui Zeng ◽  
Jing Wang ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Pearson Correlation ◽  
Intraclass Correlation ◽  
Correlation Coefficients ◽  
Cross Sectional Study ◽  
Cross Sectional ◽  
High Agreement ◽  
Intraclass Correlation Coefficients ◽  
Repeatability And Reproducibility ◽  
The Mean

Purpose: Purpose of this study is to evaluate the measuring consistency of central refraction between multispectral refraction topography (MRT) and autorefractometry.Methods: This was a descriptive cross-sectional study including subjects in Sun Yat-sen Memorial Hospital from September 1, 2020, to December 31, 2020, ages 20 to 35 years with a best corrected visual acuity of 20/20 or better. All patients underwent cycloplegia, and the refractive status was estimated with autorefractometer, experienced optometrist and MRT. We analyzed the central refraction of the autorefractometer and MRT. The repeatability and reproducibility of values measured using both devices were evaluated using intraclass correlation coefficients (ICCs).Results: A total of 145 subjects ages 20 to 35 (290 eyes) were enrolled. The mean central refraction of the autorefractometer was −4.69 ± 2.64 diopters (D) (range −9.50 to +4.75 D), while the mean central refraction of MRT was −4.49 ± 2.61 diopters (D) (range −8.79 to +5.02 D). Pearson correlation analysis revealed a high correlation between the two devices. The intraclass correlation coefficient (ICC) also showed high agreement. The intrarater and interrater ICC values of central refraction were more than 0.90 in both devices and conditions. At the same time, the mean central refraction of experienced optometrist was −4.74 ± 2.66 diopters (D) (range −9.50 to +4.75D). The intra-class correlation coefficient of central refraction measured by MRT and subjective refraction was 0.939.Conclusions: Results revealed that autorefractometry, experienced optometrist and MRT show high agreement in measuring central refraction. MRT could provide a potential objective method to assess peripheral refraction.

Validation of the Three-Item Skindex-Mini Among Hidradenitis Suppurativa Patients With Diverse Racial Backgrounds

2020 ◽  
Vol 24 (5) ◽  
pp. 457-460
Author(s):  
Lauren A.V. Orenstein ◽  
Adaugo Amah ◽  
Fiona M. Shaw ◽  
Chao Zhang ◽  
Robert A. Swerlick ◽  
...  
Keyword(s):  
Hidradenitis Suppurativa ◽  
Rating Scale ◽  
Clinical Care ◽  
Pearson Correlation ◽  
Life Quality ◽  
Correlation Coefficients ◽  
Numeric Rating Scale ◽  
Secondary Outcome ◽  
Cross Sectional ◽  
And Function

Background Hidradenitis suppurativa (HS) is a chronic inflammatory skin disease that severely impairs patients’ quality of life (QoL). Instruments such as the 10-item Dermatology Life Quality Index and 16-item Skindex-16 have been used to assess QoL in HS; however, it is unknown whether the shorter 3-item Skindex-mini can also provide an accurate assessment of skin-related QoL in patients with HS. Objectives The aim was to assess how well the Skindex-16 correlates with its shorter adaptation, the Skindex-mini, in capturing QoL among patients with HS. Methods This retrospective cross-sectional study included all HS patients seen in the HS Clinic at The Emory Clinic between January 1, 2019, and August 16, 2019. We compared the correlation between the symptom, emotion, and function domains of the Skindex-16 and Skindex-mini using Pearson correlation coefficients (CC). Secondary outcome measures included individual survey item analysis, ItchyQuant scores, and numeric rating scale of pain. Results We identified 108 encounters among 75 unique hidradenitis suppurativa patients (43 black/African American, 18 white, 5 Asian/Pacific Islander, 3 Latino, 4 Other, 2 unknown). Pearson CC between the Skindex-16 and Skindex-mini domain scores for all encounters were 0.770 ( P < .001), 0.787 ( P < .001), and 0.801 ( P < .001) for the symptom, emotion, and function domains, respectively. The mean pain and ItchyQuant scores were 4.14 (SD 3.31) and 3.55 (SD 3.34), respectively. Conclusions The Skindex-mini correlated highly with the Skindex-16 in a racially diverse group of patients with HS. The Skindex-mini is a streamlined QoL instrument that could be practically implemented into routine clinical care among diverse patients presenting to dermatology.

scholarly journals Validation of protein and potassium intakes assessed from 24 h recalls against levels estimated from 24 h urine samples in children and adolescents of Turkish descent living in Germany: results from the EVET! Study

2011 ◽  
Vol 15 (4) ◽  
pp. 640-647 ◽  
Author(s):  
Beate Bokhof ◽  
Anette E Buyken ◽  
Canan Doğan ◽  
Arzu Karaboğa ◽  
Josa Kaiser ◽  
...  
Keyword(s):  
Children And Adolescents ◽  
Urine Sample ◽  
Dietary Habits ◽  
Pearson Correlation ◽  
Correlation Coefficients ◽  
Assessment Tools ◽  
Nutritional Intake ◽  
Cross Sectional ◽  
Mean Differences ◽  
Study Participants

AbstractObjectiveNutrition-related health problems such as obesity are frequent among children and adolescents of Turkish descent living in Germany, yet data on their dietary habits are scarce. One reason might be the lack of validated assessment tools for this target group. We therefore aimed to validate protein and K intakes from one 24 h recall against levels estimated from one 24 h urine sample in children and adolescents of Turkish descent living in Germany.DesignCross-sectional analyses comprised estimation of mean differences, Pearson correlation coefficients, cross-classifications and Bland–Altman plots to assess the agreement between the nutritional intake estimated from a single 24 h recall and a single 24 h urine sample collected on the previous day.SettingDortmund, Germany.SubjectsData from forty-three study participants (aged 5–18 years; 26 % overweight) with a traditional Turkish background were included.ResultsThe 24 h recall significantly overestimated mean protein and K intake by 10·7 g/d (95 % CI of mean difference: 0·6, 20·7 g/d) and 344 mg/d (95 % CI 8, 680 mg/d), respectively. Correlations between intake estimates were r = 0·25 (P = 0·1) and 0·31 (P = 0·05). Both methods classified 70 % and 69 % of the participants into the same/adjacent quartile of protein and K intake and misclassified 7 % and 7 %, respectively, into the opposite quartile. Bland–Altman plots indicated a wide scattering of differences in both protein and K intake.ConclusionsAmong children and adolescents of traditional Turkish descent living in Germany, one 24 h recall may only be valid for categorizing subjects into high, medium or low consumers.

scholarly journals Role of Alexithymia, Anxiety, and Depression in Predicting Self-Efficacy in Academic Students

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Mahbobeh Faramarzi ◽  
Soraya Khafri
Keyword(s):  
College Students ◽  
Self Efficacy ◽  
Pearson Correlation ◽  
General Health Questionnaire ◽  
Correlation Coefficients ◽  
Cross Sectional Study ◽  
Anxiety And Depression ◽  
Depression Symptoms ◽  
Cross Sectional

Objective. Little research is available on the predictive factors of self-efficacy in college students. The aim of the present study is to examine the role of alexithymia, anxiety, and depression in predicting self-efficacy in academic students. Design. In a cross-sectional study, a total of 133 students at Babol University of Medical Sciences (Medicine, Dentistry, and Paramedicine) participated in the study between 2014 and 2015. All participants completed the Toronto Alexithymia Scale (TAS-20), College Academic Self-Efficacy Scale (CASES), and 14 items on anxiety and depression derived from the 28 items of the General Health Questionnaire (28-GHQ). Results. Pearson correlation coefficients revealed negative significant relationships between alexithymia and the three subscales with student self-efficacy. There was no significant correlation between anxiety/depression symptoms and student self-efficacy. A backward multiple regression analysis revealed that alexithymia was a negative significant predictor of self-efficacy in academic students (B=-0.512, P<0.001). The prevalence of alexithymia was 21.8% in students. Multiple backward logistic analysis regression revealed that number of passed semesters, gender, mother’s education, father’s education, and doctoral level did not accurately predict alexithymia in college students. Conclusion. As alexithymia is prevalent in college students and affects self-efficacy and academic functioning, we suggest it should be routinely evaluated by mental physicians at universities.

scholarly journals The correlation between fetal frontal lobe development parameters and gestational week: A preliminary study

2021 ◽  
Author(s):  
Xu Pingping ◽  
Zhang Dirong ◽  
Shi Yu ◽  
Li Dandan ◽  
Li Yuan ◽  
...  
Keyword(s):  
Frontal Lobe ◽  
Developmental Disorders ◽  
Normal Development ◽  
Linear Regression Analysis ◽  
Correlation Coefficients ◽  
Transverse Diameter ◽  
Reference Ranges ◽  
Cross Sectional ◽  
Gestational Week ◽  
Anterior Posterior

AbstractObjectiveTo establish a reference range of developmental parameters related to the frontal lobe of normal fetuses in different gestational weeks, which can provide a basis for the evaluation of normal development of the frontal lobe and the diagnosis of suspected fetal microcephaly.MethodsA prospective cross-sectional study was performed on 751 normal fetuses between 21 and 36 weeks, and the anterior-posterior diameter and transverse diameter of the frontal lobe were measured in transcerebellar plane. Linear regression analysis was performed by grouping different gestational weeks.ResultsFetal anterior-posterior diameter and transverse diameter of the frontal lobe were positively correlated with gestational week with correlation coefficients 0.871 and 0.971 respectively. There was a linear relationship between gestational weeks and frontal lobe parameters, and the equations were simplified to obtain the simple correlation formula: fetal frontal lobe anterior-posterior diameter(mm)=14.5+0.7×(gestational week-21), frontal lobe transverse diameter (mm)=41+2.5×(gestational week-21).ConclusionThe reference ranges of the frontal lobe anterior-posterior diameter and the frontal lobe transverse diameter of normal fetuses between 21 to 36 weeks in transcerebellar plane were established, which can provide valuable information for the evaluation of normal development of the frontal lobe and the diagnosis of suspicious fetal microcephaly.What’s already known about this topic?We currently lack a golden standard to diagnosis microcephaly and fetal frontal lobe dysplasia is a clue for prenatal diagnosis of microcephaly.What does this study add?This study presents a novel evaluation of the fetal frontal lobe to better assess brain development in the transcerebellar plane.The fetal frontal lobe developmental diameters will be useful to aid diagnosis of suspicious microcephaly and other cortical developmental disorders.

scholarly journals Impact of COVID-19 on psychology of nurses working in the emergency and fever outpatient:A cross-sectional survey

2020 ◽  
Author(s):  
Shasha Cui ◽  
Yujun Jiang ◽  
Qianyu Shi ◽  
Lei Zhang ◽  
Dehua Kong ◽  
...  
Keyword(s):  
Pearson Correlation ◽  
Psychological Impact ◽  
Correlation Coefficients ◽  
Cross Sectional Survey ◽  
Public Health Response ◽  
Cross Sectional ◽  
Health Response ◽  
Rest Time ◽  
And Coping ◽  
Night Shifts

Abstract Background COVID-19 poses a great challenge to the global health system. The nurses of emergency and fever outpatient (EFO) act as gatekeepers to the health care system in the public health response to COVID-19 epidemic. This study examined the psychological impact of COVID-19 upon EFO nurses in Chinese hospitals. Methods In midmonth of February, 2020, convenience sampling was used to recruit EFO nurses from hospitals in Jiangsu Province. Data were obtained by self-administered online questionnaires, which consisted of a general questionnaire, the Self-Rating Anxiety Scale, Perceived Stress Scale-14 and Simplified Coping Style Questionnaire. A total of 481 questionnaires were returned and 453 valid questionnaires were recovered. Multiple linear regression was used to explore the influence of socio-psychological and working condition factors on anxiety, stress and stress coping tendency. Pearson correlation coefficients were calculated to assess the associations among anxiety, stress and coping tendency. Results Among the participants, 281(62.03%) had no anxiety symptoms, 154(34.00%) had mild anxiety, 16(3.53%) had moderate anxiety, and 2(0.44%) had severe anxiety. There were 146(32.23%) participants with scores greater than 25 in the PSS, indicating excessive stress. We found that 229(50.55%) participants were more likely to respond positively to stress, while 224(49.45%) were more likely to respond negatively. The models we used included gender, fear of infecting family members, regretting being a nurse, having children, confidence in fighting outbreak, rest time, professional attitudes, having attended infection prevention training, and number of night shifts; and they were all predictors of the mental health of EFO nurses. Pearson correlation showed a positive correlation of the anxiety with stress score (r=0.443, P<0.001), while the coping tendency score was found negatively correlated with anxiety (r=-0.268, P< 0.001) and stress (r=-0.503, P< 0.001). Conclusion COVID-19 has a certain psychosocial impact upon EFO nurses. Effective measures, such as strengthening protection training, adequate nurses for emergency and fever clinics, reducing night shifts, and timely updates of latest epidemic situation, should be taken. Moreover, greater attention should be paid to female EFO nurses and nurses with children.

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