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Multilevel analysis

Fernanda Bartolomeo Freire-Maia, Sheyla Márcia Auad, Mauro Henrique Nogueira Guimarães de Abreu, Fernanda Sardenberg, Milene Torres Martins, Saul Martins Paiva, Isabela Almeida Pordeus, Miriam Pimenta Vale
The aim of this study was to assess the prevalence and discriminate the associated factors between enamel fractures and other trauma/trauma sequelae in 8 to 10-year-old Brazilian schoolchildren. A representative sample of 1,201 children from public and private schools were enrolled in this cross-sectional study. Questionnaires about sociodemographic characteristics were answered by parents. The outcome variable (traumatic dental injury, TDI) was multi-categorized. Independent individual variables were sex, age, number of residents in household, parents/caregivers' level of education, family income, dental caries, and overjet...
August 13, 2018: Brazilian Oral Research
Youn Ok Lee, Antonio A Morgan-Lopez, James M Nonnemaker, Jessica K Pepper, Edward C Hensel, Risa J Robinson
Introduction: Delivery of nicotine and substances from electronic nicotine delivery systems, or e-cigarettes, depends in-part on how users puff on the devices. Little is known about variation in puffing behavior to inform testing protocols or understand if puffing behaviors result in increased exposure to emissions. Methods: We analyzed puff topography data collected using a wireless portable use monitor (wPUMTM) continuously over 2 weeks among N = 34 current second generation ecigarette users in their everyday lives...
August 10, 2018: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
Aline S Monte-Santo, Silvânia V C Viana, Kelly Maria S Moreira, José Carlos P Imparato, Fausto M Mendes, Gabriela A V C Bonini
BACKGROUND: Evidence regarding the impact of premature loss of primary molars on oral health-related quality of life (OHRQoL) is lacking. AIM: To evaluate the prevalence of premature loss of primary molars in schoolchildren and its impact on OHRQoL. DESIGN: We randomly selected 667 children aged 8-9 years enrolled in public and private schools from Aracaju (Brazil). The presence of untreated dental caries and early loss of primary molars were recorded, and its impacts on OHRQoL evaluated using Child Perceptions Questionnaire (CPQ8-10 )...
August 13, 2018: International Journal of Paediatric Dentistry
Lies Declercq, Laleh Jamshidi, Belén Fernández-Castilla, S Natasha Beretvas, Mariola Moeyaert, John M Ferron, Wim Van den Noortgate
When (meta-)analyzing single-case experimental design (SCED) studies by means of hierarchical or multilevel modeling, applied researchers almost exclusively rely on the linear mixed model (LMM). This type of model assumes that the residuals are normally distributed. However, very often SCED studies consider outcomes of a discrete rather than a continuous nature, like counts, percentages or rates. In those cases the normality assumption does not hold. The LMM can be extended into a generalized linear mixed model (GLMM), which can account for the discrete nature of SCED count data...
August 13, 2018: Behavior Research Methods
Elinor Saiegh-Haddad, Lina Haj
The study tested the impact of the phonological distance between Spoken Arabic (SpA) and Standard Arabic (StA) on quality of phonological representations among kindergarten, first-, second-, and sixth-grade Arabic-speaking children (N = 120). A pronunciation accuracy judgment task targeted three types of StA words that varied in extent of phonological distance from their form in SpA: (a) identical words, with an identical lexical-phonological form in StA and SpA; (b) cognate words, with partially overlapping phonological forms; items in this category varied in degree of phonological distance too; and (c) unique words with entirely different lexical-phonological forms...
August 13, 2018: Journal of Child Language
Emilia Prospero, Sara Galmozzi, Valentina Paris, Gessica Felici, Pamela Barbadoro, Antonella D'Alleva, Gemma Zocco, Andrea Ciavattini
BACKGROUND: Pregnant women are at increased risk of influenza complications. Influenza vaccine provides them a substantial protection. The aim of this study was to investigate determinants associated with non-adherence to influenza vaccine recommendations in pregnant women in Italy. METHODS: A cross-sectional study has been carried out among pregnant women attending their follow-up visit in some mother and child services in a Region of Italy from October 2016 to January 2017...
August 12, 2018: Influenza and Other Respiratory Viruses
Sarah J Holmes, Anita J Mudge, Elizabeth A Wojciechowski, Matthias W Axt, Joshua Burns
BACKGROUND: Children with cerebral palsy are at risk of developing muscle contractures, often contributing to pain, structural deformities and mobility limitations. With the increasing use of gait indices to summarise the findings of three dimensional gait analysis (3DGA), the purpose of this study is to determine whether there is a relationship between multilevel joint contractures and the Gait Profile Score in children with cerebral palsy. METHODS: The Gait Profile Score, calculated from 3D gait analysis, and passive range of motion, strength and spasticity of the hips, knees and ankles in the sagittal plane were measured in 145 children with cerebral palsy (mean age:11 years,4 months; SD:2 years,10 months) (83 males) enrolled in the NSW Paediatric Gait Analysis Service Research Registry from 2011 to 2016...
August 8, 2018: Clinical Biomechanics
Moussa Laanani, Joël Coste, Pierre-Olivier Blotière, Franck Carbonnel, Alain Weill
BACKGROUND & AIMS: We investigated perforations, bleeding, and splenic injuries after screening or diagnostic colonoscopies to identify patient-, procedure-, endoscopist-, and facility-associated risk factors. METHODS: We analyzed data from the SNIIRAM-PMSI national claims databases in France. A total of 4,088,799 patients, 30 years or older, undergoing a first screening or diagnostic colonoscopy from 2010 through 2015 were identified. Rates of severe adverse events (SAEs) were estimated using stringent and broad definitions...
August 9, 2018: Clinical Gastroenterology and Hepatology
E Desailly, A Badina, N Khouri
In single event multilevel surgery, femoral derotation is commonly performed. When the kinematic deviations are asymmetrical its indication is frequently one-sided. What are the effects of this procedure on the transverse kinematics of the pelvis and on the contralateral hip rotation and foot progression angles? Among 170 children with CP, operated, with at least a clinical gait analysis before and after surgery, 42 having had a unilateral femoral derotation are included. Patients with tibial derotation are excluded...
July 27, 2018: Gait & Posture
Jizhou Wang, Tianwei Sun, Xiaoqi He
The present study is a retrospective study.Axial symptoms are frequently encountered complication after laminoplasty. Some studies have reported the influencing factors and preventive measures of axial symptoms after laminoplasty. However, impact of different laminae open angles on the postoperative axial symptoms remains unclear.The objective of the present study was to explore the effect of different laminae open angles on postoperative axial symptoms and to discuss the possible mechanisms of the impact of different open angles on axial symptoms...
August 2018: Medicine (Baltimore)
Alexandre Rasouli, Jason M Cuellar, Lea Kanim, Rick Delamarter
BACKGROUND: Recent studies demonstrate the efficacy of lumbar arthroplasty using the ProDisc-L. Patients frequently present with multilevel pathology and may be candidates for multilevel disk replacement. PURPOSE: To evaluate clinical outcomes and sagittal range of motion of operated levels and adjacent lumbar motion segments in multiple-level ProDisc-L constructs after 2-6 years follow-up. PATIENT SAMPLE: A total of 159 patients underwent adjacent 2-level (n=114), 3-level (n=41), or 4-level (n=4) lumbar total disk replacement (TDR)...
August 7, 2018: Clinical Spine Surgery
Dorothy L Espelage, Gabriel J Merrin, Jun Sung Hong, Stella M Resko
In the past two decades, there has been a significant amount of research on children's relational aggression, which has been found to be associated with psychosocial problems. Longitudinal studies have examined changes in relational aggression during early adolescence in relation to individual characteristics; however, most studies compare individual differences between people with regard to rates of relational aggression. A shortcoming to the current literature is the lack of studies that use a multilevel approach to examine individual differences (between-person) as well as the extent to which individuals deviate from their own typical levels (within-person) over time...
August 9, 2018: Journal of Youth and Adolescence
Cristine Scattolin Andersen, Rogério Lessa Horta, Marcos Pascoal Pattussi
Introduction: Use of tobacco, alcohol and other drugs can be considered a global health problem, which typically begins in adolescence. Unsupervised access to information may arouse the adolescent's interest and predispose the use of drugs. Methodology: This is a cross-sectional study using data from National School-based Health Survey (PeNSE, 2012), with sample of 109,104 Brazilian students in 42.717 schools. Outcomes were: self-reported use of alcohol, tobacco, and other drugs in the past 30 days...
December 2018: Addictive Behaviors Reports
Adrienne Strait, Alexandra Velasquez, Margaret A Handley, Karen Leong, Adriana Najmabadi, Neil R Powe, Delphine S Tuot
Background: The Kidney Awareness Registry and Education (KARE) trial examined the impact of a multilevel intervention on blood pressure control among patients with chronic kidney disease (CKD) in a public health care delivery system. KARE consisted of a clinic-based intervention (a primary care CKD registry with point-of-care provider notifications and quarterly feedback related to CKD management) and a patient-directed intervention [a CKD self-management support (CKD-SMS) program that included low literacy educational materials, automated telephone-administered self-management modules and telephone health coaching]...
August 2018: Clinical Kidney Journal
Akhenaten Benjamin Siankam Tankwanchi
BACKGROUND: The Commission on Social Determinants of Health (CSDH) identifies the maldistribution of power, money, and resources as main drivers of health inequities. The CSDH further observes that tackling these drivers effectively requires interventions to focus at local, national, and global levels. Consistent with the CSDH's observation, this paper describes the eco-psychopolitical validity (EPV) paradigm, a multilevel and transdisciplinary model for research and action, thus far insufficiently tapped, but with the potential to systematize the exploration of the social determinants of health...
August 9, 2018: Globalization and Health
Sophie E Claudel, Joel Adu-Brimpong, Alnesha Banks, Colby Ayers, Michelle A Albert, Sandeep R Das, James A de Lemos, Tammy Leonard, Ian J Neeland, Joshua P Rivers, Tiffany M Powell-Wiley
BACKGROUND: Cardiovascular disease is a leading economic and medical burden in the United States (US). As an important risk factor for cardiovascular disease, hypertension represents a critical point of intervention. Less is known about longitudinal effects of neighborhood deprivation on blood pressure outcomes, especially in light of new hypertension guidelines. METHODS: Longitudinal data from the Dallas Heart Study facilitated multilevel regression analysis of the relationship between neighborhood deprivation, blood pressure change, and incident hypertension over a 9-year period...
August 6, 2018: American Heart Journal
Jiana Wang, Shu Hu, Lie Wang
BACKGROUND: The classroom environment plays a potentially important role in shaping the emotions and behavior of adolescents. However, few studies have focused on this factor. The aim of this study was to explore the association between the classroom environment and emotional and behavioral problems among Chinese adolescents while also considering personality-and family-related factors. METHODS: This cross-sectional study was conducted in November and December, 2009...
2018: PloS One
Patrícia Corrêa-Faria, Mauro Henrique Nogueira Guimarães de Abreu, Lidia Moraes Ribeiro Jordão, Maria do Carmo Matias Freire, Luciane Rezende Costa
BACKGROUND: Breastfeeding plays an important role in child health, including the development of normal dental occlusion, but large epidemiological findings on the association breastfeeding-malocclusion are lacking. AIM: To investigate the association between the proportion of breastfed children in the city level and the prevalence of malocclusion in the primary dentition at age 5. DESIGN: This cross-sectional analysis used data from national population surveys on oral health and on breastfeeding practices...
August 8, 2018: International Journal of Paediatric Dentistry
Feng Liang, Peng Guan, Wei Wu, Jing Liu, Ning Zhang, Bao-Sen Zhou, De-Sheng Huang
BACKGROUND: World Health Organization (WHO), the World Bank, UN System Influenza Coordination (UNSIC) and other international organizations released a series of documents to fight against the influenza pandemic. Those documents have great significance on guiding influenza pandemic preparedness and responses and providing a multilevel, multi-directional influenza pandemic prevention and control network for their member countries. This study focuses on the above-mentioned influenza pandemic preparedness guidelines with the aim of exploring the roles of the society, defining the relationship of different interventions and evaluating the planning on influenza pandemic preparedness...
August 8, 2018: BMC Infectious Diseases
Melissa Nataatmadja, David W Johnson, Elaine M Pascoe, Darsy Darssan, Carmel M Hawley, Yeoungjee Cho
BACKGROUND: Glucose is the most commonly used osmotic medium in peritoneal dialysis (PD) solutions, and its use has been associated with both local and systemic adverse effects. Previous, single-center, observational cohort studies have reported conflicting findings regarding whether a relationship exists between peritoneal glucose exposure and peritoneal small solute transport rate. METHODS: In this secondary analysis of the balANZ multi-center, multinational, randomized controlled trial of a neutral pH, ultra-low glucose degradation product (biocompatible) versus conventional PD solutions over a 2-year period, the relationship between time varying peritoneal glucose exposure and change in peritoneal solute transport rate, (measured as dialysate to plasma creatinine ratio at 4 hours [D:PCr4h]), was evaluated using multivariable, multilevel linear regression...
August 7, 2018: Peritoneal Dialysis International: Journal of the International Society for Peritoneal Dialysis
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