scholarly journals The development and initial validation of the Health and Reproductive Survey (HeRS)

2021 ◽  
Vol 17 ◽  
pp. 174550652110048
Author(s):  
Donna Duffy ◽  
Jennifer Yourkavitch ◽  
Georgie Bruinvels ◽  
Nicola J Rinaldi ◽  
Laurie Wideman
Keyword(s):  
Physical Activity ◽  
Principal Component Analysis ◽  
Content Validity ◽  
Principal Component ◽  
Component Analysis ◽  
Face Validity ◽  
Convenience Sample ◽  
Physically Active ◽  
Menstrual Function ◽  
The Face

Background: Due to the diversity in profiles associated with the female reproductive cycle and their potential physiological and psychological effects, monitoring the reproductive status of exercising females is important from a practical and research perspective. Moreover, as physical activity can influence menstrual function, the effects of physical activity energy expenditure on reproductive function should also be considered. Aim: The aim of this study was to develop and establish initial face and content validity of the Health and Reproductive Survey (HeRS) for physically active females, which is a retrospective assessment of menstrual function from menarche (first menstruation) to menopause (cessation of menstruation). Methods: Face validity was evaluated qualitatively, and the initial content validity was established through a principal component analysis. The face validity process was completed by 26 females aged 19–67 years and the content validity was established through a survey sent to a convenience sample of 392 females, of which 230 females (57.9% and aged 18–49 years) completed the survey. Results: The revisions made following the face validation improved the understanding, flow, and coherence of the survey. The principal component analysis indicated that, at a minimum, the survey measures these constructs: menstrual cessation and associated moderators, athletic participation and performance levels (as associated with menstruation change and the menstrual cycle), age and menstrual cessation, hormonal contraception (“birth control”), and menarche and associated moderators. Conclusion: The Health and Reproductive Survey (HeRS) is a partially validated tool that can be used by researchers to characterize the menstrual status of physically active females relative to their physical activity status.

scholarly journals Content validity and test–retest reliability with principal component analysis of the translated Malay four-item version of Paffenbarger physical activity questionnaire

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Fazlisham Binti Ghazali ◽  
Siti Nurhafizah Saleeza Ramlee ◽  
Najib Alwi ◽  
Hazuan Hizan
Keyword(s):  
Public Health ◽  
Physical Activity ◽  
Principal Component Analysis ◽  
Content Validity ◽  
Principal Component ◽  
Local Context ◽  
Physically Active ◽  
Physical Activity Questionnaire ◽  
Content Type ◽  
Activity Questionnaire

PurposeThis study aimed to develop the construct validity for the Malay version of the Paffenbarger physical activity questionnaire (PPAQ) by adapting the original questionnaire to suit the local context.Design/methodology/approachThe PPAQ was adopted and translated into the Malay language and modified to reach good content agreement among a panel of experts. A total of 65 participants aged 22–55 years old, fluent and literate in the Malay language were selected. Principal component analysis (PCA) was used to investigate construct validity. Reliability of this adapted instrument was analyzed according to types of variables.FindingsThe panel of experts reached a consensus that the final four items chosen in the adapted Malay version of PPAQ were valid and supported by a good content validity index (CVI). In total, two domains consonant with the operational domain definition were identified by PCA. Based on scores from intensity and duration of exercise, the study further divided the group into who were physically active and those who chose the unstructured physical activity. Relative reliability after a 14-day interval demonstrated moderate strength of agreement with an acceptable range of measurement error.Research limitations/implicationsPPAQ has been used worldwide but was less familiar in the local context. The Malay-four item PPAQ will provide the locally validated version of physical activity questionnaire. In addition, the authors have improved the original PPAQ by dividing the question items into two distinct domains which will effectively identify those who are physically active and those who are involved in unplanned exercise. Nevertheless, further research is recommended in bigger and heterogeneous samples along with a number of reliability tests.Practical implicationsTo the authors’ knowledge, this is the first study to assess internal structure of the four-item version of PPAQ. This analysis successfully identified two components with eigenvalue more than one in the Malay four-item PPAQ. Based on this, the authors were able to separate pool of population into two groups, which are physically active and unplanned exercise (involved in unstructured exercise). The ability of the validated questionnaire to divide the population into various intensities of physical activity is a novel one, which may be useful in many public health studies where high intensity of physical activity; hence, greater energy expenditure is associated with increased longevity, better health benefit and improved cognitive function.Social implicationsIn addition, the second domain “unplanned exercise” was successfully grouped together. Implication of the unplanned exercise component is to identify pool of population with active lifestyle awareness and choose the unstructured exercise instead of vigorous and formal exercising. Even though the amount of intensity and duration of incidental exercise does not reach recommended public health recommendation, it has been proven that preferred healthier lifestyle is positively associated with better cognition in later life.Originality/valueThe adapted Malay version of PPAQ has sound psychometric properties and could assist in differentiating groups of population based on their physical activity.

Αξιολόγηση θρέψης σε υγιείς μετεμμηνοπαυσιακές Ελληνίδες

2018 ◽  
Author(s):  
Χρήστος Παπαβαγγέλης
Keyword(s):  
Physical Activity ◽  
Principal Component Analysis ◽  
International Physical Activity Questionnaire ◽  
Principal Component ◽  
Component Analysis ◽  
Physical Activity Questionnaire ◽  
Activity Questionnaire

Εισαγωγή: Η εμμηνόπαυση θέτει τις γυναίκες σε υψηλό κίνδυνο εμφάνισης χρόνιων νοσημάτων, όπως παχυσαρκία και καρδιαγγειακά νοσήματα. Παρόλα αυτά, εξαιρετικά λίγες μελέτες έχουν διεξαχθεί σε πληθυσμό μετεμμηνοπαυσιακών γυναικών με σκοπό την εκτίμηση της επίδρασης της διατροφής σε δομικούς και λειτουργικούς δείκτες αγγειακής λειτουργίας. Σκοπός: Κύριο σκοπό της παρούσας διατριβής αποτέλεσε η αξιολόγηση των διατροφικών συνηθειών μιας ομάδας υγιών μετεμμηνοπαυσιακών γυναικών. Παράλληλα, η διερεύνηση της υπάρχουσας σχέσης μεταξύ του Μεσογειακού τρόπου ζωής και της έκβασης δομικών και λειτουργικών αρτηριακών δεικτών σε υπο-ομάδα γυναικών αποτέλεσε επιπρόσθετο στόχο. Μεθοδολογία: Δείγμα της μελέτης αποτέλεσαν 638 γυναίκες που προσήλθαν στο εξωτερικό ιατρείο Κλιμακτηρίου και Εμμηνόπαυσης του Αρεταίειου Νοσοκομείου Αθηνών. Κριτήρια ένταξης ήταν η ύπαρξη εμμηνόπαυσης, δηλαδή απουσία έμμηνου ρύσεως για τουλάχιστον 12 συνεχόμενους μήνες και επίπεδα FSH >25 mIU/mL και οιστραδιόλης <50 pg/mL. Καταγράφηκαν τα δημογραφικά χαρακτηριστικά και το ιατρικό και γυναικολογικό ιστορικό των γυναικών. Επίσης, πραγματοποιήθηκε αξιολόγηση της σωματικής δραστηριότητας μέσω του International Physical Activity Questionnaire και διατροφική αξιολόγηση μέσω έγκυρου ερωτηματολογίου συχνότητας κατανάλωσης τροφίμων και υπολογίστηκε η προσκόλληση στη μεσογειακή δίαιτα μέσω του δείκτη MedDietScore. Τέλος, μετρήθηκαν ανθρωπομετρικά χαρακτηριστικά, πραγματοποιήθηκε κλινική εξέταση και αξιολογήθηκαν βιοχημικοί και ορμονικοί δείκτες. Αποτελέσματα: Η μέση ηλικία του δείγματος ήταν 57,7 ±7,6 έτη, ενώ ο ΔΜΣ ήταν 27,9 ± 5,0 kg/m2. Η μέση προσκόλληση στη μεσογειακή δίαιτα των συμμετεχουσών, σύμφωνα με το MedDietScore ήταν 36,1 ±4,7. Από την εφαρμογή πολλαπλής λογιστικής παλινδρόμησης παρατηρήθηκε ότι η Μεσογειακή δίαιτα σχετίστηκε αρνητικά με το ΔΜΣ και την περιφέρεια μέσης των γυναικών του δείγματος, μετά από προσαρμογή για συγχυτικούς παράγοντες. Ειδικότερα, οι γυναίκες υψηλής και μέτριας προσκόλλησης στη Μεσογειακή δίαιτα είχαν σημαντικά χαμηλότερους δείκτες παχυσαρκίας, υψηλότερο επίπεδο φυσικής δραστηριότητας και υψηλότερο μορφωτικό επίπεδο, σε σύγκριση με τις γυναίκες χαμηλής προσκόλλησης στο συγκεκριμένο διαιτητικό πρότυπο. Παράλληλα, μετά την εφαρμογή της Principal Component Analysis σε υπο-ομάδα 481 γυναικών του δείγματος δημιουργήθηκαν 8 διατροφικά πρότυπα, εκ των οποίων ένα διατροφικό πρότυπο πλούσιο σε διαιτητικές ίνες και σύνθετους υδατάνθρακες σχετίστηκε αρνητικά με το ΔΜΣ και την περιφέρεια μέσης των γυναικών, ενώ ένα ανθυγιεινό διατροφικό πρότυπο σχετίστηκε θετικά με το ΔΜΣ και την περιφέρεια μέσης των γυναικών, μετά την προσαρμογή για συγχυτικούς παράγοντες. Αναφορικά με την αγγειακή λειτουργία, παρατηρήθηκε σημαντική αρνητική συσχέτιση μεταξύ της ταχύτητας σφυγμικού κύματος αρτηρίας και της κατανάλωσης ροφημάτων καφέ/τσαγιού (r=-0.233, p<0.001). Ακόμη, παρατηρήθηκε θετική συσχέτιση μεταξύ του πάχους κοινής καρωτίδας και της κατανάλωσης επεξεργασμένων δημητριακών (r=0.116, p=0.04). Έπειτα από πολλαπλή γραμμική παλλινδρόμηση, η κατανάλωση ξηρών καρπών και ροφημάτων καφέ/τσαγιού σχετίστηκαν σημαντικά αρνητικά με το πάχος κοινής καρωτίδας (b-coefficient=-0.018, p=0.05) και την ταχύτητα σφυγμικού κύματος (b-coefficient= -0.327, p=0.002), αντίστοιχα. Ενώ, η κατανάλωση πατάτας σχετίστηκε σημαντικά θετικά με το πάχος κοινής καρωτίδας (b-coefficient=0.106, p<0.001). Συμπεράσματα: Η ύπαρξη διαφορετικών διατροφικών προτύπων σχετίστηκε, θετικά ή αρνητικά, με το σωματικό βάρος και την περιφέρεια μέσης στις μετεμμηνοπαυσιακές γυναίκες. Ειδικότερα, παρατηρήθηκε προστατευτική δράση της Μεσογειακής δίαιτας στους δείκτες παχυσαρκίας και η ύπαρξη σημαντικής συσχέτισης μεταξύ ορισμένων διατροφικών συνηθειών και δεικτών αγγειακής λειτουργίας

Principal Component Analysis of Accelerometer-Assessed Daily Physical Activity and Inactivity Among Adults

2011 ◽  
Vol 43 (Suppl 1) ◽  
pp. 539
Author(s):  
James J. McClain ◽  
Richard P. Troiano ◽  
David Berrigan ◽  
Robert J. Brychta ◽  
Annemarie Koster
Keyword(s):  
Physical Activity ◽  
Principal Component Analysis ◽  
Principal Component ◽  
Component Analysis ◽  
Daily Physical Activity

scholarly journals Methodological considerations for measuring spontaneous physical activity in rodents

2014 ◽  
Vol 306 (10) ◽  
pp. R714-R721 ◽  
Author(s):  
Jennifer A. Teske ◽  
Claudio E. Perez-Leighton ◽  
Charles J. Billington ◽  
Catherine M. Kotz
Keyword(s):  
Physical Activity ◽  
Principal Component Analysis ◽  
Principal Component ◽  
Sensory Stimulation ◽  
Component Analysis ◽  
Exploratory Activity ◽  
Phenotypic Differences ◽  
Spontaneous Physical Activity ◽  
Methodological Considerations ◽  
Chamber Size

When exploring biological determinants of spontaneous physical activity (SPA), it is critical to consider whether methodological factors differentially affect rodents and the measured SPA. We determined whether acclimation time, sensory stimulation, vendor, or chamber size affected measures in rodents with varying propensity for SPA. We used principal component analysis to determine which SPA components (ambulatory and vertical counts, time in SPA, and distance traveled) best described the variability in SPA measurements. We compared radiotelemetry and infrared photobeams used to measure SPA and exploratory activity. Acclimation time, sensory stimulation, vendor, and chamber size independently influenced SPA, and the effect was moderated by the propensity for SPA. A 24-h acclimation period prior to SPA measurement was sufficient for habituation. Principal component analysis showed that ambulatory and vertical measurements of SPA describe different dimensions of the rodent's SPA behavior. Smaller testing chambers and a sensory attenuation cubicle around the chamber reduced SPA. SPA varies between rodents purchased from different vendors. Radiotelemetry and infrared photobeams differ in their sensitivity to detect phenotypic differences in SPA and exploratory activity. These data highlight methodological considerations in rodent SPA measurement and a need to standardize SPA methodology.

Making faces with computers

2005 ◽  
Vol 13 (3) ◽  
pp. 459-479 ◽  
Author(s):  
Graham Pike ◽  
Nicola Brace ◽  
Jim Turner ◽  
Sally Kynan
Keyword(s):  
Principal Component Analysis ◽  
Principal Component ◽  
Component Analysis ◽  
Construction Process ◽  
Appropriate Use ◽  
Two Generations ◽  
The Face ◽  
Preliminary Study

Knowledge concerning the cognition involved in perceiving and remembering faces has informed the design of at least two generations of facial compositing technology. These systems allow a witness to work with a computer (and a police operator) in order to construct an image of a perpetrator. Research conducted with systems currently in use has suggested that basing the construction process on the witness recalling and verbally describing the face can be problematic. To overcome these problems and make better use of witness cognition, the latest systems use a combination of Principal Component Analysis (PCA) facial synthesis and an array-based interface. The present paper describes a preliminary study conducted to determine whether the use of an array-based interface really does make appropriate use of witness cognition and what issues need to be considered in the design of emerging compositing technology.

scholarly journals Improved Approach for Identification of Real and Fake Smile using Chaos Theory and Principal Component Analysis

2019 ◽  
Vol 54 (5) ◽  
Author(s):  
Hayder Ansaf ◽  
Hayder Najm ◽  
Jasim Mohammed Atiyah ◽  
Oday A. Hassen
Keyword(s):  
Principal Component Analysis ◽  
Chaos Theory ◽  
Principal Component ◽  
Component Analysis ◽  
Human Beings ◽  
Multiple Parameters ◽  
Detection Approach ◽  
The Face ◽  
And Performance ◽  
Smile Detection

The smile detection approach is quite prominent with the face detection and thereby the enormous implementations are prevalent so that the higher degree of accuracy can be achieved. The face smile detection is widely associated to have the forensic of faces of human beings so that the future predictions can be done. In chaos theory, the main strategy is to have the cavernous analytics on the single change and then to predict the actual faces in the analysis. In addition, the integration of Principal Component Analysis (PCA) is integrated to have the predictions with more accuracy. This work proposes to use the analytics on the parallel integration of PCA and chaos theory to enable the face smile and fake identifications to be made possible. The projected work is analyzed using assorted parameters and it has been found that the deep learning integration approach for chaos and PCA is quite important and performance aware in the multiple parameters with the different datasets in evaluations.

scholarly journals Exploiting Wavelet Transform, Principal Component Analysis, Support Vector Machine, and K-Nearest Neighbors for Partial Face Recognition

2019 ◽  
Vol 3 (2) ◽  
pp. 80-84 ◽  
Author(s):  
Mustafa H. Mohammed Alhabib ◽  
Mustafa Zuhaer Nayef Al-Dabagh ◽  
Firas H. AL-Mukhtar ◽  
Hussein Ibrahim Hussein
Keyword(s):  
Principal Component Analysis ◽  
Support Vector Machine ◽  
Wavelet Transform ◽  
Principal Component ◽  
Component Analysis ◽  
Input Image ◽  
Personal Identification ◽  
Support Vector ◽  
K Nearest Neighbors ◽  
The Face

Facial analysis has evolved to be a process of considerable importance due to its consequence on the safety and security, either individually or generally on the society level, especially in personal identification. The paper in hand applies facial identification on a facial image dataset by examining partial facial images before allocating a set of distinctive characteristics to them. Extracting the desired features from the input image is achieved by means of wavelet transform. Principal component analysis is used for feature selection, which specifies several aspects in the input image; these features are fed to two stages of classification using a support vector machine and K-nearest neighborhood to classify the face. The images used to test the strength of the suggested method are taken from the well-known (Yale) database. Test results showed the eligibility of the system when it comes to identify images and assign the correct face and name.

scholarly journals PRINCIPAL COMPONENT ANALYSIS BIPLOT GLOBAL COMPETITIVENESS INDEX ASEAN COUNTRIES

2021 ◽  
Vol 14 (2) ◽  
pp. 93
Author(s):  
Lina Sari ◽  
Pardomuan Robinson Sihombing
Keyword(s):  
Principal Component Analysis ◽  
Principal Component ◽  
Component Analysis ◽  
Economic Interests ◽  
Global Competitiveness ◽  
The Face ◽  
Global Competitiveness Index ◽  
Competitiveness Index ◽  
Asean Countries ◽  
State Enterprises

ASEAN's global competitiveness requires institutional and ASEAN countries appear to be a formidable economic actors in protecting the economic interests and at the same time having an open economic system that indicates the readiness of ASEAN to compete with the economic strength of the entire region in the world. In this case the measurement of global competitiveness factors become important aspects of state enterprises in the face of global competition. This study was conducted to determine how competitive the ASEAN countries with Biplot method of Principal Component Analysis. Results obtained from this study is the ASEAN countries have different advantages in each of the variables related to the global competitiveness index. In addition, the diversity of which can be explained more than 70% which is 90.69% which means that Principal Component Analysis Biplot describes well the overall total

RANCANGAN INSTRUMEN PENGUKUR ORGANIZATIONAL CITIZENSHIP BEHAVIOR DOSEN PERGURUAN TINGGI SWASTA DI JAKARTA

2021 ◽  
Vol 26 (3) ◽  
pp. 223-236
Author(s):  
Sri Hermawati ◽  
Lies Handrijaningsih ◽  
Titi Nugraheni
Keyword(s):  
Principal Component Analysis ◽  
Organizational Citizenship ◽  
Organizational Citizenship Behavior ◽  
Content Validity ◽  
Principal Component ◽  
Civic Virtue ◽  
Component Analysis ◽  
Citizenship Behavior ◽  
Cronbach Alpha ◽  
Total Item

Beberapa penelitian menunjukkan bahwa salah satu faktor yang ikut berperan dalam karier individu adalah Organizational Citizenship Behavior (OCB). OCB mengacu pada perilaku peran ekstra karyawan, yaitu perilaku yang bersifat sukarela dan melampaui ekspektasi peran normal. Berbagai penelitian menunjukkan bahwa pemberlakuan OCB memiliki dampak positif yang kuat pada berbagai hasil kerja individu. Mengingat peran dan dampak OCB dalam organisasi maka perlu disusun instrumen yang tepat untuk mengukur OCB. Penelitian ini dilakukan untuk menyusun instrumen pengukur OCB di kalangan dosen. OCB diukur dari lima dimensi yakni altruism, courtesy, conscientiousness, sportsmanship, dan civic-virtue. Uji reliabilitas dilakukan dengan melihat statistik Cronbach Alpha. Uji validitas ini menggunakan Content Validity Ratio. Validitas isi instrumen diperoleh dengan memberikan kuesioner yang dirancang kepada panelis yang terdiri dari pakar yang berkecimpung di dunia pendidikan dengan bidang psikologi dan manajemen. Pengujian validitas item sebagai pengukur variabel juga dilakukan dengan analisis Principal Component Analysis (PCA). Hasil uji PCA menunjukkan terbentuknya 10 variabel yang dapat digunakan untuk mengukur OCB di kalangan dosen. Total item pernyataan yang membentuk 10 variabel tersebut adalah 36 item pernyataan.

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