نتایج جستجو برای: longitudinal study

تعداد نتایج: 4025281  

Journal: :international journal of preventive medicine 0
masoud etemadifar mohsen janghorbani mohammad mehdi koushki fatemeh etemadifar mahboobeh fereidan esfahani

background: the aim of this study was to estimate the conversion rate from radiologically isolated syndrome (ris) to definite multiple sclerosis (ms). methods: during a mean (standard deviation [sd]) follow-up period of 17.4 (5.4) (range 8-29) months, 25 subjects with ris and without neurological symptom aged 22-45 year from a single-center have been examined for the occurrence of definite ms. ...

Journal: :journal of research in health sciences 0
asghar mohammadpoorasl saharnaz nedjat ali fakhari akbar fotouhi

background: adolescent tobacco use remains a major public health priority to reduce the prevalence of tobacco use in community. the aim of this study was determining the association of the transitions in smoking stages with prevalence of cigarette smoking in the classes and schools in adolescents of tabriz city (northwest of iran). methods: fifty-six high schools were randomly selected, and 490...

Journal: :iranian red crescent medical journal 0
paula clara santos department of physiotherapy, school of health technology of porto, polytechnic institute of porto, porto, portugal; research centre in physical activity, health and leisure, faculty of sport, university of porto, porto, portugal; corresponding author: paula clara santos, department of physiotherapy, school of health technology of porto, polytechnic institute of porto, porto, portugal. tel: +351-222061000, fax: +351-222061001, e-mail: sandra abreu research centre in physical activity, health and leisure, faculty of sport, university of porto, porto, portugal carla moreira research centre in physical activity, health and leisure, faculty of sport, university of porto, porto, portugal rute santos research centre in physical activity, health and leisure, faculty of sport, university of porto, porto, portugal; early start research centre, school of education, faculty of social sciences, university of wollongong, wollongong, australia margarida ferreira research centre in physical activity, health and leisure, faculty of sport, university of porto, porto, portugal odete alves ponte da barca health unit, alto minho local health unit, porto, portugal

background physical activity (pa) patterns during pregnancy have not been explored in depth and most previous studies lack assessment of variables such as type, frequency, duration and intensity of activity. objectives this study had two goals: 1) to analyze pa patterns during pregnancy according to weekly time spent on different types of activity; and 2) to determine women’s perception about h...

Journal: :international journal of pediatrics 0
satar rezaei 1school of public health, kermanshah university of medical sciences, kermanshah, iran behzad karami matin school of public health, kermanshah university of medical sciences, kermanshah, iran enayatollah homaie rad social determinants of health research center, guilan university of medical sciences, rasht,iran

methodsusing time series data of national level (1967 to 2012 years), we explored the association between total fertility rate, gdp per capita, number of physician per 1000 populations, female labor force participation rate, percentage of people living in rural regions and mean years schooling for each people with infant mortality rate of iran. these data were obtained from central bank of isla...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده ادبیات و زبانهای خارجی 1390

abstract this research is about a longitudinal case study of english morpheme acquisition by a persian speaking child l2 learner of english (2 .9-3).the goal of this research has been discovery of the child ‘s ability in acquiring of english morphemes in a persian context while only one person (the child’ s father)has been talking to her.this child has also been exposed to english languag...

This  study  examined  the  effects  of  individual  difference  (ID)  factors  on  changing  pragmatic abilities  among  L2  learners  of  English.  Participants  were  48  Japanese  EFL  students  in  an English-medium  university  in  Japan.  They  completed  a  pragmatic  speaking  test  (k=12)  that assessed  their  ability  to  produce  two  speech  acts:  requests  and  opinions,  in  hi...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه مازندران - پژوهشکده علوم انسانی و اجتماعی 1391

the central purpose of this study was to conduct a case study about the role of self monitoring in teacher’s use of motivational strategies. furthermore it focused on how these strategies affected students’ motivational behavior. although many studies have been done to investigate teachers’ motivational strategies use (cheng & d?rnyei, 2007; d?rnyei & csizer, 1998; green, 2001, guilloteaux & d?...

Journal: :journal of biostatistics and epidemiology 0
malihe rezaei department of biostatistics, school of health, kerman university of medical sciences, kerman, iran. ali akbar haghdoost department of epidemiology, research enter for modeling in health, institute for futures studies in health, kerman university of medical sciences, kerman, iran. maryam okhovati department of library and information science, medical informatics research enter, kerman university of medical sciences, kerman, iran. farzane zolala department of epidemiology, research center for modeling in health, institute for futures studies in health, kerman university of medical sciences, kerman, iran. mohammad reza baneshi department of biostatistics, modeling in health research center, institute for futures studies in health, kerman university of medical sciences, kerman, iran.

each semester, students are asked to evaluate the academic staff through an online questionnaire. generalized estimating equations model (gee), taking into account the correlation between scores, is the established tool to analyze longitudinal data. the aim of this manuscript is to identify characteristics that influence staff score and to address the importance of selection of appropriate corr...

MethodsUsing time series data of national level (1967 to 2012 years), we explored the association between total fertility rate, GDP per capita, number of physician per 1000 populations, female labor force participation rate, percentage of people living in rural regions and mean years schooling for each people with infant mortality rate of Iran. These data were obtained from Central Bank of Isla...

2016
Caroline J Bull Kate Northstone

OBJECTIVE To investigate the prospective associations between dietary patterns in childhood and CVD risk in adolescence. DESIGN Prospective cohort study. Exposures were dietary patterns at age 7, 10 and 13 years derived by cluster analysis. Outcomes were physiological and biochemical cardiovascular risk markers. SETTING Avon Longitudinal Study of Parents and Children (ALSPAC), UK. SUBJECT...

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