Search results for "cross-section"
showing 10 items of 2665 documents
Core muscle activation during dynamic upper limb exercises in women.
2012
Although several everyday functions and sporting activities demand controlled use of the abdominal and back muscles while working with the upper limbs, the activity of core muscles during dynamic upper limb exercises in the standing position has not been studied extensively. The purpose of this cross-sectional study was to examine abdominal and back muscle activity during dynamic upper limb exercises while standing and to evaluate whether dynamic exercises are appropriate for strengthening muscles. The activation of the rectus abdominis, obliquus externus abdominis, longissimus, and multifidus muscles during dynamic bilateral or unilateral shoulder exercises with or without fixation of the …
Are Latin American cycling commuters 'at risk'? A comparative study on cycling patterns, behaviors, and crashes with non-commuter cyclists
2020
Abstract Introduction As part of the transformation of urban transportation dynamics, commuter cycling has acquired a high relevance as an alternative mode of transport in different countries, and Latin America seems to be one of the main focus of this worldwide “revolution”. However, the high rates of crashes and injuries suffered by commuters have become a relevant issue in the field of road safety, especially in emerging regions with low cycling tradition, where social and infrastructural gaps may endanger the cyclists’ safety. Objectives This study had two objectives. First, to compare key safe cycling-related variables between cycling commuters and non-commuters; and second, to differe…
Validation of the Spanish Version of the Beginning Breastfeeding Survey-Cumulative: A Follow-up Study
2019
Background: The Beginning Breastfeeding Survey-Cumulative (BBSC) is an instrument that assesses the overall maternal perception of breastfeeding effectiveness during the early postpartum period. Research aims: The aims of this study were to adapt and validate a Spanish version of the BBSC and provide new evidence regarding its validity. Methods: A standard forward and back-translation process was used to obtain the Spanish version of the questionnaire (BBSC-E). A sample of 793 breastfeeding mothers was used. Data were obtained from clinical records and questionnaires self-administered at discharge and at 1–4 months postpartum. The factorial structure of the BBSC-E was examined with both an …
Risk factors for suicidal ideation in a large, registry-based sample of adult long-term childhood cancer survivors
2020
Abstract Introduction Long-term childhood cancer survivors (CCS) are at risk for physical and psychosocial late effects. Previous research has attested to increased rates of suicidal ideation (SI) in CCS, an especially dangerous indicator of distress. However, little was known about risk factors of SI among CCS which go beyond illness- and treatment related variables. Methods A registry-based sample of 916 adult long-term CCS (Mage=34.58 years [SD=5.53], Mage at diagnosis=6.15 years [SD=4.28]) underwent medical assessments and filled out questionnaires. We conducted a linear regression analysis on SI, testing predictors of different areas: sociodemographic, social, physical health and healt…
Neuromuscular performance of lower limbs during voluntary and reflex activity in power- and endurance-trained athletes.
1994
Neural, mechanical and muscle factors influence muscle force production. This study was, therefore, designed to compare possible differences in the function of the neuromuscular system among differently adapted subjects. A group of 11 power-trained athletes and 10 endurance-trained athletes volunteered as subjects for this study. Maximal voluntary isometric force and the rate of force production of the knee extensor and the plantar flexor muscles were measured. In addition, basic reflex function was measured in the two experimental conditions. The power athletes produced higher voluntary forces (P<0.01-0.001) with higher rates for force production (P<0.001) by both muscle groups measured. U…
Religious comfort and anxiety in women with cancer: The mediating role of hope and moderating role of religious struggle
2018
OBJECTIVE Religiosity is an important source of consolation among individuals suffering from cancer. However, religion does not always bring comfort. Religious struggles elicit stress. We examined whether religious comfort predicts anxiety in patients diagnosed as having cancer. Hope was examined as a mediator and religious struggle as a moderator in this relationship. METHODS In this cross-sectional, descriptive-analytical research, 77 Polish women with cancer were selected using sequential convenience sampling. Data were collected using the Religious Comfort and Strain Scale, the Adult Hope Scale, and the State-Trait Anxiety Inventory. A statistical procedure using Pearson's correlation c…
Optical Coherence Tomography Angiography of Optic Disc in Eyes With Primary Open-angle Glaucoma and Normal-tension Glaucoma.
2019
PURPOSE To examine vessel density (VD) properties of the optic nerve head in eyes with ocular hypertension (OHT), high-tension glaucoma (HTG), and normal-tension glaucoma (NTG) and to evaluate associations on structural parameters of retinal nerve fiber layer (RNFL). METHODS Three groups of patients with OHT (n=15), HTG (n=36), and NTG (n=22), and a healthy control group (n=23) were included in this study. Peripapillary VD and optic disc flow area were measured using optical coherence tomography angiography, and peripapillary RNFL (pRNFL) thickness was determined. Global and sectoral analysis of optic nerve head vasculature and pRNFL thickness were measured. RESULTS Glaucomatous eyes had lo…
Cervical ectopy: associations with sexually transmitted infections and HIV. A cross-sectional study of high school students in rural South Africa.
2014
Objectives It has been hypothesised that ectopy may be associated with increased susceptibility to sexually transmitted infections (STIs). In this cross-sectional study, we wanted to explore the association between STIs (including HIV) and cervical ectopy. Methods We included 700 sexually active young women attending randomly selected high schools in a rural district in KwaZulu-Natal, South Africa. The district is endemic of HIV and has a high prevalence of STIs. We did computer-assisted measurements of the ectocervical area covered by columnar epithelium (ectopy) in colposcopic images and STI analyses on cervicovaginal lavage and serum samples. All participating women answered a questionna…
Evaluation of Xerostomia and salivary flow rate in Hashimoto’s Thyroiditis
2015
Background: One of the most common causes of hypothyroidism is Hashimoto´s Thyroiditis (HT). Early detection of dry mouth is critical in preserving and promoting systemic and oral health. In this study we have assessed, for the first time, salivary function and xerostomia in HT patients who have not been involved with Sjögren´s syndrome. Material and Methods: HT was diagnosed in 40 patients based on clinical findings and positive anti-thyroid peroxidase antibodies (anti-TPO). Controls, matched by sex, age and body mass index (BMI), and with no history of thyroid disease, were selected. A questionnaire was used for diagnosis of xerostomia. Saliva samples were taken between 8 a.m. and 9 a.m.,…
Assessment of maximal handgrip strength: How many attempts are needed?
2017
BACKGROUND: Handgrip strength (HGS) is used to identify individuals with low muscle strength (dynapenia). The influence of the number of attempts on maximal HGS is not yet known and may differ depending on age and health status. This study aimed to assess how many attempts of HGS are required to obtain maximal HGS.METHODS: Three cohorts (939 individuals) differing in age and health status were included. HGS was assessed three times and explored as continuous and dichotomous variable. Paired t-test, intraclass correlation coefficients (ICC) and Bland-Altman analysis were used to test reproducibility of HGS. The number of individuals with misclassified dynapenia at attempts 1 and 2 with respe…