ABSTRACT
Growth is one of the most important indices in child health. The best and most effective way to investigate child health is measuring the physical growth indices such as weight, height and head circumference. Among these measures, weight growth is the simplest and the most effective way to determine child growth status. Weight trend at a given age is the result of cumulative growth experience, whereas growth velocity represents what is happening at the time. This longitudinal study was conducted among 606 children repeatedly measured from birth until 2 years of age. We used linear mixed model to analyze repeated measures and to determine factors affecting the growth trajectory. LOWESS smooth curve was used to draw velocity curves. Gender, child rank, birth status and feeding mode had a significant effect on weight trajectory. Boys had higher weight during the study. Infants with exclusive breast feeding had higher weight than other infants. Boys had higher growth velocity up to age 6 month. Breast fed infants had higher growth velocity up to 6 month, but thereafter the velocity was higher in other infants. Many of the studies have investigated child growth, but most of them used cross-sectional design. In this study, we used longitudinal method to determine effective factors on weight trend in children from birth until 2-year-old. The effects of perinatal factors on further growth should be considered for prevention of growth disorders and their late complications
Subject(s)
Humans , Female , Male , Growth , Infant , Linear ModelsABSTRACT
To evaluate predictive factors of adolescents' appraisal of their health. The nationwide study, entitled "Childhood and Adolescence Surveillance and Prevention of Adult Non-communicable Diseases [CASPIAN] study," was conducted in 2010 among Iranian school students, aged 10-18. In addition to demographic factors and physical examination, variables as family structure, nutrition habits, physical activity, smoking, hygienic habits, violence, school attachment, family smoking, and family history of chronic diseases were assessed. The dependent variable is the self-rated health [SRH] and it was measured by 12 items, which had already been combined through latent class analysis. We had taken a dichotomous variable, i.e. the higher values indicate better SRH. The dependent variable was regressed on all predictors by generalized additive models. 75% of adolescents had a good SRH. The linear and smooth effects of independent variables on SRH were observed. Among all the variables, physical activity had a positive linear effect on SRH [beta = 0.08, P value = 0.003]. Smoking, violence, and family history of disease associated to SRH non-linearly [P value < 0.05]. Family smoking [beta = -0.01] and hygienic habits [beta = 0.27] related to SRH both linearly and non-linearly. Physical health and high risk behavior, either of linear or non-linear effect, are factors, which seem to shape the adolescents' perception of health
Subject(s)
Humans , Female , Male , Health Status , Health Status Indicators , Logistic Models , Schools , Self ReportABSTRACT
The aim of this study was to show up-to-date estimates of incidence and prevalence in Isfahan for all cancers, except non-melanoma skin cancer over the period 2001-2010 to provide projections up to 2015, based on a statistical method that uses mortality and cancer patients' survival data. Mortality data in Isfahan province were collected from various sources such as hospitals, medical forensic, cemetery, and health centers. In addition, population data by sex, age, location, and calendar year in the period of 2001-2010 were acquired from the Statistical Center of Iran. Relative survival probabilities for all cancers combined and for selected specific cancers were estimated based on observed cancer death and expected mortality data. Incidence and prevalence estimates were computed with Mortality-incidence Analysis Model [MIAMOD] method. The estimated age-standardized cancer incidence rate had higher increase rate for urban females than for males. Also, the number of prevalent cancers was higher among females, which was mostly due to better cancer survival rates in women. Age-adjusted incidence was estimated to increase by 6.9 and 8.7 per 100000 annually, between 2001 and 2015, in males and females, respectively. The prevalence is to increase by 24 and 40 and mortality by 2.8 and 2.5 per 100000 between 2001 and 2015. The present study does not only show the incidence and prevalence estimates of all cancers combined, but also gives information about cancer burden, which can be used as a bases for planning healthcare management and allocating recourses in public health
ABSTRACT
This study aimed to develop and test the validity of a risk score to be used as a simple tool to identify those children at high risk of sonographic non-alcoholic fatty liver disease [NAFLD]. This cross-sectional study was conducted among 962 participants aged 6-18 years in Isfahan, Iran. They consisted of three groups of nearly equal number of normal-weight, overweight and obese individuals. Coefficients of the logistic regression models were used to assign a score value for each variable and the composite sonographic NAFLD risk score was calculated as the sum of those scores. Performance of model was assessed by receiver operating characteristic [ROC] curve procedure. Data of 931 participants was included in the analysis. The sonographic findings of 16.8% of participants were compatible with NAFLD. Age, sex, body mass index, waist circumference and serum triglycerides level were diagnosed as factors associated with NAFLD. The risk score was calculated as 50 for sonographic NAFLD. This study, to the best of our knowledge is the first of its kind in the pediatric age group, focuses on predicting sonographic NAFLD from easily-measured factors. It may suggest an association of hypertriglyceridemic-waist phenotype with NAFLD in the pediatric age group