scholarly journals Development of a Mobile Phone App for Measuring Striking Response Time in Combat Sports: Cross-Sectional Validation Study (Preprint)

2019 ◽  
Author(s):  
Victor Coswig ◽  
Jader Sant' Ana ◽  
Maicon Nascimento Coelho ◽  
Antonio Renato Pereira Moro ◽  
Fernando Diefenthaeler
Keyword(s):  
Response Time ◽  
High Speed ◽  
Pearson Correlation ◽  
Intraclass Correlation ◽  
Mobile App ◽  
Combat Sports ◽  
Validity And Reliability ◽  
Cross Sectional ◽  
Significant Difference ◽  
Dependent Samples

BACKGROUND TReaction is a mobile app developed to determine strike response time at low cost and with easy application in combat sports. However, the validity and accuracy of the response time obtained by the TReaction app has not yet been evaluated. OBJECTIVE This study aimed to test the validity and reliability of the TReaction app in measuring motor response time in combat sports. METHODS A total of two athletes performed 59 strikes to assess the response time upon visual stimulus using the TReaction app simultaneously with a high-speed camera. Accuracy of the measure was verified using a computer simulator programmed to discharge visual stimuli and obtain the response time. Pearson correlation, Student <italic>t</italic> test for dependent samples, and the Bland-Altman analysis were performed. Accuracy was verified using the intraclass correlation coefficient. Effect size (g) and the typical error of measurement (TEM) were calculated. The significance level was set at <italic>P</italic>&lt;.05. RESULTS No significant difference (<italic>P</italic>=.56) was found between both systems. The methods presented a very strong correlation (<italic>r</italic>=0.993). The magnitude of differences was trivial (g&lt;0.25), and TEM was 1.4%. These findings indicate a high accuracy between the computer screen and the mobile app measures to determine the beginning of the task and the response time. CONCLUSIONS Our findings suggest that the TReaction app is a valid tool to evaluate the response time in combat sports athletes.

scholarly journals Development of a Mobile Phone App for Measuring Striking Response Time in Combat Sports: Cross-Sectional Validation Study

10.2196/14641 ◽  
2019 ◽  
Vol 7 (11) ◽  
pp. e14641
Author(s):  
Victor Coswig ◽  
Jader Sant' Ana ◽  
Maicon Nascimento Coelho ◽  
Antonio Renato Pereira Moro ◽  
Fernando Diefenthaeler
Keyword(s):  
Response Time ◽  
High Speed ◽  
Pearson Correlation ◽  
Intraclass Correlation ◽  
Mobile App ◽  
Combat Sports ◽  
Validity And Reliability ◽  
Cross Sectional ◽  
Significant Difference ◽  
Dependent Samples

Background TReaction is a mobile app developed to determine strike response time at low cost and with easy application in combat sports. However, the validity and accuracy of the response time obtained by the TReaction app has not yet been evaluated. Objective This study aimed to test the validity and reliability of the TReaction app in measuring motor response time in combat sports. Methods A total of two athletes performed 59 strikes to assess the response time upon visual stimulus using the TReaction app simultaneously with a high-speed camera. Accuracy of the measure was verified using a computer simulator programmed to discharge visual stimuli and obtain the response time. Pearson correlation, Student t test for dependent samples, and the Bland-Altman analysis were performed. Accuracy was verified using the intraclass correlation coefficient. Effect size (g) and the typical error of measurement (TEM) were calculated. The significance level was set at P<.05. Results No significant difference (P=.56) was found between both systems. The methods presented a very strong correlation (r=0.993). The magnitude of differences was trivial (g<0.25), and TEM was 1.4%. These findings indicate a high accuracy between the computer screen and the mobile app measures to determine the beginning of the task and the response time. Conclusions Our findings suggest that the TReaction app is a valid tool to evaluate the response time in combat sports athletes.

scholarly journals Validity and reliability testing of the Indonesian version of the eHealth Literacy Scale during the COVID-19 pandemic

2021 ◽  
Vol 27 (1) ◽  
pp. 146045822097546
Author(s):  
Maria Cellina Wijaya ◽  
Yudhistira Pradnyan Kloping
Keyword(s):  
Internal Consistency ◽  
Pearson Correlation ◽  
Intraclass Correlation ◽  
Correlation Method ◽  
Validity And Reliability ◽  
Cronbach’S Alpha ◽  
Acceptable Result ◽  
Cross Sectional ◽  
Ehealth Literacy ◽  
Cronbach's Alpha

Nowadays, it is common for people to look for health care information on the internet. The eHealth Literacy Scale (eHEALS) is commonly used to measure eHealth literacy. As of the publication of this study, the Indonesian version for eHEALS has not been published even though eHealth literacy is necessary, especially in the current COVID-19 pandemic. We aimed to evaluate the validity and reliability of the Indonesian version of eHEALS (I-eHEALS). A total of 100 respondents in East Java were involved in this cross-sectional study. Pearson-product moment correlation method and construct validity were used to validate the results. The reliability was determined based on the Cronbach’s alpha internal consistency measurement and intraclass correlation coefficient (ICC). The Pearson correlation analysis results are significantly higher ( r > 0.254, p < 0.01) compared to the critical value table. Single factors accounting for 57.66% variance in the scales exhibit a unidimensional latent structure. The internal consistency between items is excellent as shown by the Cronbach’s alpha coefficient (0.91). The ICC analysis shows an acceptable result (0.552, p < 0.01). The I-eHEALS is valid and reliable to be used for evaluating the eHealth literacy of the Indonesian population.

scholarly journals Validation of the cultural adaptation of the Kujala score in Arabic

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Bassem I. Haddad ◽  
Mohammad Hamdan ◽  
Ula Isleem ◽  
Munther Ghassan Al-Saber ◽  
Fadi A. Al-Hadidi ◽  
...  
Keyword(s):  
Pearson Correlation ◽  
Intraclass Correlation ◽  
Calculated Data ◽  
Patellofemoral Pain ◽  
P Value ◽  
Multiple Choice Questions ◽  
Cross Sectional ◽  
Kujala Score ◽  
Significant Difference ◽  
The Mean

Abstract Background Patellofemoral pain is a common condition. The Kujala score is a well-established scoring system to assess anterior knee pain and has been translated into many languages including Arabic. The purpose of this cross-sectional study is to culturally adapt the Arabic version of the Kujala score and determine its validity. Methods The Kujala score is composed of 13 multiple-choice questions. We modified two questions in the score; running and squatting, and were replaced with questions related to walking on different terrain and prostration, each with the same number of answer choices as the original questions so as not to affect the final score. These modifications were written in Arabic by the same group who translated and validated the original score into Arabic. The original and modified Kujala scores was printed and given to patients complaining of patellofemoral pain to be filled during their visit to the orthopedic outpatient clinics. Final scores for the original and modified questionnaires were calculated. Data was analyzed using SPSS statistics version 21.0 measuring Cronbach’s alpha, intraclass correlation coefficient, and Pearson correlation. Results Ninety-four patients were included in the study, 28 (29.8%) men and 66 (70.2%) women. The mean age for the included patients was 43.67 (± 14.46) years. The mean score for the modified initial questionnaire was 63.91 (± 16.32), and the mean score for the modified re-test questionnaire was 66.52 (± 17.50). There was a statistically significant difference between the mean scores (p = 0.041), with a mean difference of 1.97 (95% CI 0.08 to 3.856). We found a significant strong correlation between the score before and after changing the questions with a p value of < 0.001. Conclusions The culturally modified Arabic Kujala questionnaire is shown to be a valid, well-designed tool and an appropriate method of measuring patellofemoral pain.

scholarly journals AIR-BT, a new badminton-specific incremental easy-to-use test

PLoS ONE ◽  
2021 ◽  
Vol 16 (9) ◽  
pp. e0257124
Author(s):  
Javier Abián-Vicén ◽  
Alfredo Bravo-Sánchez ◽  
Pablo Abián
Keyword(s):  
Oxygen Uptake ◽  
Correlation Coefficient ◽  
Pearson Correlation ◽  
Intraclass Correlation ◽  
Regression Equation ◽  
Treadmill Test ◽  
Cross Sectional ◽  
Moment Coefficient ◽  
Significant Difference ◽  
And Performance

Background Badminton is a highly demanding sport characterized by intermittent efforts with energy being provided by both the aerobic and anaerobic systems. To date, no incremental badminton field test has been developed that can be easily used by badminton coaches that requires accessible material for anyone. Objectives The purpose of this study was to develop a practical and reliable easy-to use intermittent endurance badminton test for estimating maximal oxygen uptake (VO2max). Methods Thirty six Spanish badminton players (age: 24.1±10.3 years) performed, on different days of the same week, four incremental protocols to exhaustion in randomized order: a treadmill incremental test, a Yo-Yo intermittent recovery level 1 test (Yo-Yo IR1) and twice the Abian intermittent recovery badminton test (AIR-BT). Oxygen uptake was determined with a breath-by-breath gas analyzer during the incremental treadmill test, and performance in the Yo-yo IR1 and AIR-BT was recorded. Results Significant correlations (p<0.001) for Pearson’s product moment coefficient were found between the performance in the AIR-BT and the two non-specific incremental tests (VO2max in the Treadmill Test: r = 0.87, distance in the Yo-Yo IR1: r = 0.86). The regression equation to calculate the VO2max from the AIR-BT time [VO2max = 0.023*(AIR-BT time in seconds)+31.334] showed an adjusted R2 of 0.76 and a SEE of 3.34 ml·kg-1·min-1. There was no significant difference between VO2max obtained by the incremental treadmill test and VO2max calculated using the regression equation (p = 0.644). A paired t-test reported no significant differences between day 1 and day 2 in the AIR-BT time (p = 0.753), the Pearson correlation coefficient between both days was: r = 0.88 (p<0.001) and the intraclass correlation coefficient was 0.875. Conclusions The AIR-BT is a valid and reliable on-court test for assessing VO2max in badminton players and may be utilized by coaches and physical trainers for cross-sectional comparison of players and for evaluation of longitudinal changes.

scholarly journals The Validity and Reliability of Kinovea Software in Measuring Thoracic Kyphosis and Lumbar Lordosis

2021 ◽  
Vol 19 (2) ◽  
pp. 129-136
Author(s):  
Ali Sharifnezhad ◽  
◽  
Gholam Reza Raissi ◽  
Bijan Forogh ◽  
Hosniyeh Soleymanzadeh ◽  
...  
Keyword(s):  
Correlation Coefficient ◽  
Lumbar Lordosis ◽  
Thoracic Kyphosis ◽  
Pearson Correlation ◽  
Intraclass Correlation ◽  
Standing Position ◽  
Cross Sectional Study ◽  
Validity And Reliability ◽  
Cross Sectional ◽  
Cobb Method

Objectives: The present study evaluated the inter-rater and intra-rater validity and reliability of posturography by Kinovea software to measure the thoracic kyphosis and lumbar lordosis. Methods: Eighteen subjects (10 females & 8 males) referring for radiographic imaging were included in this cross-sectional study. For evaluating the validity, the thoracic kyphosis and lumbar lordosis were measured according to the Cobb method and Kinovea in standing position. The inter-rater and intra-rater reliability of Kinovea were tested by 3 evaluators and one expert evaluator, respectively. Results: Pearson correlation coefficient data suggested that the validity of measuring the thoracic kyphosis depends on the evaluator’s expertise. Besides, the correlation was not significant in measuring the lumbar lordosis angle (P>0.05). The inter-rater and intra-rater repeatability revealed that the correlation was significant in all angles by the intraclass correlation coefficient (P<0.001). Discussion: Posturography by Kinovea, as a noninvasive method presents an excellent inter-rater and intra-rater repeatability for measuring thoracic kyphosis and lumbar lordosis. This reliable method is simple, efficient, and inexpensive.

Validity and reliability of the Turkish version of the Patient Dignity Inventory

2021 ◽  
pp. 1-8
Author(s):  
Yasemin Eskigülek ◽  
Sultan Kav
Keyword(s):  
Palliative Care ◽  
Factor Analysis ◽  
Intraclass Correlation ◽  
Validity And Reliability ◽  
Turkish Version ◽  
Retest Reliability ◽  
Significant Difference ◽  
Test Retest Reliability ◽  
Fit Index ◽  
Turkish Society

Abstract Objective The aim of this study was to investigate the validity and reliability of the Patient Dignity Inventory (PDI) in the Turkish society, which was developed to evaluate dignity-related distress in palliative care patients. Methods One hundred and twenty-seven adults with advanced cancer hospitalized in several clinics of two university hospitals were included in the study. The patients whose Palliative Performance Scale score was at least 40% were recruited to study. The data were collected with a patient demographic form, the Turkish version of Hospital Anxiety and Depression Scale (HADS-TR), and the Turkish version of the PDI (PDI-TR). The PDI-TR was finalized and back-translated after translating into Turkish and obtaining 10 expert opinions. Exploratory and confirmatory factor analysis, internal consistency, concurrent validity, and test–retest reliability analysis were performed. Results The Cronbach's α coefficient of PDI-TR was 0.94. Factor analysis resulted in a five-factor solution, and all items were loaded on factors. Factors were labeled as symptom distress, existential distress, self-confidence, dependency, and supportive care needs and accounted for 68.70% of the overall variance. The model's normed fit index, comparative fit index, and X2/SD were found between acceptable range (0.90, 0.93, and 2.64, respectively). A positive and strong correlation was found between subdimension scores of HADS-TR and the total score of PDI-TR (r = 0.70 for anxiety subdimension; r = 0.73 for depression subdimension). The test–retest reliability was conducted with 32 patients within the sample two weeks after the first application, and no significant difference was found between the two application scores as the result of paired-sample t-test (p > 0.05). An intraclass correlation coefficient of test–retest reliability was r = 0.855. Significance of results PDI-TR was found to be a valid and reliable tool in palliative care patients in Turkish society.

scholarly journals The Iranian version of theory-based intention for cesarean section (IR-TBICS) scale: development and first evaluation

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Seyed Abolhassan Naghibi ◽  
Maryam Khazaee-Pool ◽  
Mahmood Moosazadeh
Keyword(s):  
Cesarean Section ◽  
Content Validity ◽  
Intraclass Correlation ◽  
Quality Criteria ◽  
Factor Analyses ◽  
Validity And Reliability ◽  
Delivery Method ◽  
Northern Iran ◽  
Cross Sectional ◽  
Confirmatory Factor Analyses

Abstract Background The rate at which mothers experience a cesarean section in the absence of medical signs is growing worldwide. Women’s beliefs and intentions play an essential role in the request or choice of a delivery method. At present, there is no comprehensive, validated scale for assessing pregnant women’s beliefs about cesarean section in the Iranian population. This study was performed to develop and assess the validity and reliability of the intention-based cesarean section scale using the theory of reasoned action (TRA) constructs as a theoretical framework for measuring intention toward the selection of a delivery method. Methods In this cross-sectional validation study, 480 pregnant women were recruited from Sari, in northern Iran, through a multistage random sampling approach. Content validity was examined using the content validity index (CVI) and content validity ratio (CVR). Furthermore, both exploratory factor analyses (EFA) and confirmatory factor analyses (CFA) were applied to assess the construct validity of the developed scale. Reliability was measured by internal consistency and the intraclass correlation coefficient (ICC). Quality criteria for floor and ceiling effects were derived from existing guidelines and consensus within our research group. Results The results obtained from the factor analysis showed that the data were fit to the model (χ2 = 2298.389, P < 0.001). The TRA comprised 24 items assessing five domains, which described 62.46% of the common variance. The CFA showed a model with suitable fitness for the data. Cronbach’s alpha coefficient for the domains of the scale ranged from 0.609 to 0.843, and the ICC value ranged from 0.71 to 0.84, which is within the satisfactory range. The IR-TBICS scale had no floor or ceiling effect on the total score or any of the dimensions. Conclusions The belief-based cesarean section scale appears to be a reliable instrument. It is considered suitable and can be applied in other research in Iran.

scholarly journals The Patient’s Denture Assessment (Thai version) is a valid and reliable tool for evaluating the outcome of treatment with complete denture

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Sahaprom Namano ◽  
Orapin Komin
Keyword(s):  
Treatment Outcome ◽  
Pearson Correlation ◽  
Treatment Success ◽  
Intraclass Correlation ◽  
Reliability And Validity ◽  
Complete Denture ◽  
Care Clinic ◽  
Geriatric Dentistry ◽  
Significant Difference ◽  
Denture Treatment

Abstract Background Complete tooth losses are still being major problems which resulted in lesser quality of life especially for elderly patients. However, there are still lack of questionnaire to evaluate the treatment outcome from the patient’s aspect. The objective of this study is to evaluate the reliability and validity of the Patient’s Denture Assessment-Thai version (PDA-T), then use this questionnaire to assess patient satisfaction with complete denture treatment outcome also investigates the factors involving their satisfaction. Methods The subjects comprised 120 edentulous adult patients (49 men/71 women; average age 70 years-old) from the Prosthodontic and the Geriatric Dentistry and Special Patients Care Clinic at the Faculty of Dentistry, Chulalongkorn University during 2019 March‒2020 March. The patients were divided into two groups: the group experienced (Exper) (n = 54) with wearing complete dentures, and the non-experienced (NonExper) group (n = 66). The patients used the validated PDA-T to self-assess their treatment at different times. The Exper group completed the questionnaire at t0 (during treatment), t0.5 (2‒8-weeks after t0), and t1 (final follow-up). The NonExper group completed the questionnaire only at t1. Results In the Exper group, Cronbach’s α and average inter-item correlation was 0.95 (range 0.76‒0.95) and 0.47 (range 0.57‒0.83), respectively. The intraclass correlation coefficients (n = 18, 95% confidence interval) were 0.98 overall. The paired t-test (p < 0.05) between t0 and t1 indicated a significant difference between t0 and t1 in every PDA-T topic, and the effect size was 1.71. In the NonExper group, the Pearson correlation analysis indicated no significant correlation between the patients' demographics and masticatory function. Conclusion The reliability and validity of the PDA-T indicate it is a valuable tool for evaluating complete denture treatment. Treatment success affected the patients' satisfaction but was not associated with the type of doctors, genders, ages, or educational level.

scholarly journals Relationship between Ratio of Second and Fourth Digit and Obesity Traits among Different Ethnic Groups in Ilorin, North Central Nigeria

2016 ◽  
Vol 8 (4) ◽  
pp. 396-400 ◽  
Author(s):  
Bolaji Fatai OYEYEMI ◽  
John Oluwafemi ADEBAYO ◽  
Abass Toba ANIFOWOSHE ◽  
Oluyinka Ajibola IYIOLA
Keyword(s):  
Ethnic Groups ◽  
Pearson Correlation ◽  
Standard Procedure ◽  
Surrogate Marker ◽  
Relative Length ◽  
Cross Sectional Study ◽  
Digit Ratio ◽  
Sectional Study ◽  
Cross Sectional ◽  
Significant Difference

Digit ratio (2D:4D) denotes the relative length of the second and fourth digits. There are contradicting reports on its relationship with ethnicity/race, whereas convincing studies show it is related to obesity. This cross-sectional study was undertaken to demystify ethnic difference in 2D:4D ratio and to analyze its relationship with obesity among adults in Ilorin Nigeria. The cross-sectional study included 701 individuals. Finger lengths were measured with electronic calipers and other anthropometric traits were measured with standard procedure. Student t test and one-way ANOVA were used to detect differences among groups and relationship was computed with Pearson correlation. The receiver operator characteristic curves were used to detect the diagnostic effect of 2D:4D for obesity. The obtained results showed sexual dimorphism in 2D:4D ratio and other anthropometrics at p < 0.01. Obesity was associated with significantly higher mean of 2D:4D in both genders (female 0.9814 ± 0.012:0.9700 ± 0.012; male 0.9700 ± 0.010:0.9592 ± 0.010 at p < 0.001). The area under the curve was 0.753 (95% CI 0.677-0.829, p < 0.01) and 0.798 (95% CI 0.756-0.804, p < 0.01) in female and male R2D:4D respectively for obesity, implying that 2D:4D might be a surrogate marker for obesity in future.  No significant difference was found in 2D:4D among different ethnic groups studied (p >0.05); this result proved that there was no ethnic specificity in 2D:4D ratio among study’ participants. Thus, it can be reported that the digit ratio was related to high 2D:4D, but this cannot be said for different ethnic groups. The results imply that 2D:4D might be a good surrogate indicator for obesity, but not ethnicity.  

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.

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