ABSTRACT
El impacto del estado nutricional prenatal, especialmente lo concerniente al peso de nacimiento (PN) y sus efectos tanto en el corto, mediano o largo plazo, sobre el estado nutricional y el desarrollo cognitivo del niño y, sobre la ocupación desempeñada en la vida adulta, ha sido una problemática de interés para diversos investigadores; al respecto, algunos autores encuentran una asociación positiva y significativa entre estas variables, mientras que otros no encuentran ninguna relación. Es así como se ha descrito que niños con PN insuficiente, bajo o, extremadamente bajo, además del deterioro temprano del estado nutricional, presentarían en el corto plazo, un mayor riesgo de daño en la maduración cerebral, retraso del desarrollo cognitivo y menores circunferencias craneanas, lo que implicaría menor volumen encefálico y bajo rendimiento intelectual. En el corto y mediano plazo, esta situación perjudicaría el proceso enseñanza-aprendizaje en la etapa escolar, mientras que en el largo plazo, esto condicionaría la ocupación a desempeñar en la vida adulta. Actualmente, el cuerpo de conocimientos pone de manifiesto que los hallazgos relativos a estas asociaciones no son concluyentes, existiendo gran controversia en estas materias. Este artículo de revisión tiene el propósito de analizar la evidencia existente hasta este momento, con el objeto de incentivar la investigación en estos aspectos que son de gran relevancia para el desarrollo del niño y su vida futura.
The impact of prenatal nutritional status, assessed through birth weight (BW) and their effects in the short, medium and long-term on nutritional status, cognitive development and job status in the adult life, has been a problem of interest for several researchers; as regards, some of these report a positive and significant association between these variables and others do not find any relation. Children with insufficient, low or very low BW despite the early more deteriorate nutritional status should present higher risk for brain maturation, failure cognitive development and lowered head circumference which implies both lowered brain volume and intellectual development. In the short and medium-term, this situation damages the learning process at school-age, while in the long-term this might condition the quality of jobs. At present, the body of knowledge pinpoints that findings related to these associations is not conclusive verifying a great controversy in these matters. This review article has the purpose of analyzing the current evidence, in order to stimulate research about to these aspects which are relevant for child development and their future life.
Subject(s)
Humans , Infant, Newborn , Birth Weight , Learning Disabilities , Neurobehavioral Manifestations , Nutritional Status , Child Development Disorders, Pervasive/prevention & controlABSTRACT
The impact of prenatal nutritional status, assessed through birth weight (BW) and their effects in the short, medium and long-term on nutritional status, cognitive development and job status in the adult life, has been a problem of interest for several researchers; as regards, some of these report a positive and significant association between these variables and others do not find any relation. Children with insufficient, low or very low BW despite the early more deteriorate nutritional status should present higher risk for brain maturation, failure cognitive development and lowered head circumference which implies both lowered brain volume and intellectual development. In the short and medium-term, this situation damages the learning process at school-age, while in the long-term this might condition the quality of jobs. At present, the body of knowledge pinpoints that findings related to these associations is not conclusive verifying a great controversy in these matters. This review article has the purpose of analyzing the current evidence, in order to stimulate research about to these aspects which are relevant for child development and their future life.
Subject(s)
Birth Weight/physiology , Child Development/physiology , Cognition/physiology , Intelligence/physiology , Nutritional Status/physiology , Adult , Humans , Infant, NewbornABSTRACT
OBJECTIVE: To determine the impact of nutritional status in a multicausal approach of socio-economic, socio-cultural, family, intellectual, educational and demographic variables at the onset of elementary school in 1987 on the educational situation of these children in 1998, when they should have graduated from high school. SETTING: Chile's Metropolitan Region. DESIGN: Prospective, observational and 12-year follow-up study. METHODS: A representative sample of 813 elementary first grade school-age children was randomly chosen in 1987. The sample was assessed in two cross-sectional studies. The first cross-sectional study was carried out in at the onset of elementary school in 1987 and the second was carried out in 1998, 12-years later, when they should be graduating from high school. In 1998, 632 adolescent students were located and their educational situation was registered (dropout, delayed, graduated and not located). At the onset of elementary school were determined the nutritional status, socio-economic status (SES), family characteristics, intellectual ability (IA), scholastic achievement (SA) and demographic variables. Statistical analysis included variance tests and Scheffe's test was used for comparison of means. Pearson correlation coefficients and logistic regression were used to establish the most important independent variables at the onset of elementary school in 1987 that affect the educational situation 1998. Data were analysed using the statistical analysis system (SAS). RESULTS: Logistic regression revealed that SES, IA, SA and head circumference-for-age Z score at the onset of elementary school in 1987 were the independent variables with the greatest explanatory power in the educational situation of school-age children in 1998. CONCLUSIONS: These parameters at an early school age are good predictors of the educational situation later and these results can be useful for nutrition and educational planning in early childhood.
Subject(s)
Child Nutrition Disorders/complications , Cognition/physiology , Educational Status , Nutritional Status , Social Class , Adolescent , Anthropometry , Cephalometry , Child , Child Nutrition Disorders/psychology , Chile , Cross-Sectional Studies , Demography , Educational Measurement/methods , Female , Follow-Up Studies , Humans , Intelligence/physiology , Learning , Logistic Models , Male , Predictive Value of Tests , Prospective Studies , Socioeconomic FactorsABSTRACT
The objective of this study was to determine the degree of knowledge on food and nutrition of school-age children's mothers from Chile's Metropolitan Region and to measure the impact of socioeconomic, sociocultural and demographic variables on knowledge. A representative and proportional sample of 4,509 school-age children was chosen from Chile's Metropolitan Region and the degree of knowledge on food and nutrition on mothers of 1,985 of them was determined. The sample was stratified according to grade (I, II, IV, VI, VIII elementary school grades and I and IV high school grades), sex, type of school and geographic area. Socioeconomic status (SES) was determined through Graffar's modified method. The degree of knowledge on food and nutrition was assessed by a test based on the specific objectives pursued by the elementary school curriculum programs of the Ministry of Education and submitted to adequate statistical proofs for its content validity and reliability. Mother's schooling level mean was 9.7 +/- 4.0 y. The field study was carried out on 1986-1987. Statistical procedures included analysis of variance, Student "t" test for comparison of the means, correlation and regression. Results revealed that mothers did not know food and nutrition matters in fundamental aspects related to the observance of a healthy lifestyle, both, for themselves and their family. The degree of knowledge of food and nutrition significantly and positively correlated with SES, mother's schooling and occupation level, housing conditions (quality and sanitation) and age, and significantly and inversely correlated with the number of sons and crowding, besides of being significantly higher in urban than rural mothers. Mother's schooling level and geographic area were the independent variables with the greatest explanatory power in the food and nutrition knowledge variance (r2 = 0.1723), but mother's schooling level explains 93.2% of the explained variance. Results suggest the need to introduce, during school age, nutrition education programs focused on mother and children to improve the population life quality.
Subject(s)
Food , Health Knowledge, Attitudes, Practice , Mothers/education , Nutritional Physiological Phenomena , Adult , Child , Chile , Cultural Characteristics , Educational Status , Feeding Behavior , Female , Humans , Middle Aged , Socioeconomic Factors , Students , Urban PopulationABSTRACT
BACKGROUND: In Chile there is scarce food and nutrition knowledge among school age children. AIM: To determine the degree of food and nutrition knowledge of elementary and high school children and its relationship to socioeconomic status, sex, type of school and geographic area. SUBJECTS AND METHODS: Between 1986 and 1987, a representative and proportional sample of 4509 children was chosen from the Metropolitan Region. This sample was stratified according to school grade, sex, type of school and geographical area. Graffar's modified method was used to measure socioeconomic status. Food and nutrition knowledge was assessed by a specific test for each grade, based on the objectives pursued by the curricular programs of the Ministry of Education. RESULTS: The test was applied to 4197 children. Food and nutrition knowledge was significantly lower in the second subcycle of elementary school, in males, in older children from each grade, in rural areas, in children of low socioeconomic status and in public schools. CONCLUSIONS: School age children were unaware of fundamental aspects related to food and nutrition and curriculum programs of the Ministry of Education should be reformulated to overcome these deficiencies.
Subject(s)
Food , Nutritional Sciences/education , Child , Chile , Female , Humans , Male , Rural Population , Sex Factors , Socioeconomic Factors , Surveys and Questionnaires , Urban PopulationABSTRACT
The objective of this study was to determine the interrelationship between the scholastic achievement (SA) test and nutritional status of a representative sample of 4,509 elementary and high school children from Chile's Metropolitan Region. Percentages of weight/age (W/A), height/age (H/A), and weight/height (W/H) were compared to WHO (World Health Organization) Tables, head circumference/age (HC/A) to the Tanner Tables, and brachial anthropometry to Frisancho's norms. Socioeconomic status (SES) was measured by means of Graffar's Modified Method; SA by means of a language and mathematics test. Statistical analysis included correlation, regression, and WHO risk-approach methodology. Results showed that HC/A was the anthropometric parameter with the greatest explanatory power in SA variance and was significantly greater in high school graduates who were 17 y old (r = 0.350; p < 0.001; r2 = 0.122) than in elementary school children, who were 6 y old (r = 0.227; p < 0.001; r2 = 0.049), with a relative risk of 2.1 and 1.5, respectively. The explanatory power of W/A and H/A in SA variance was significantly decreased, and no significant differences were observed among high school students. These findings confirm that HC/A is the most important anthropometric parameter associated with SA. Educational selectivity apparently relates to HC/A, and not to W/A or H/A. These results may be useful in planning nutritional and educational policies.
Subject(s)
Learning , Nutritional Status , Adolescent , Anthropometry/methods , Cephalometry , Child , Chile , Data Collection , Education , Educational Measurement , Humans , Risk FactorsABSTRACT
The objectives of this study were to determine the head circumference (HC) values of a representative sample of 4,346 school children aged 5 to 18 years from Chile's Metropolitan Region, to carry out a comparative study with international reference data of Tanner, Nellhaus and Roche et al and to compare the HC values by socioeconomic status (SES). The sample included school children of both sexes, from public, private subsidized and private non-subsidized schools and from urban and rural areas. HC was measured according to Jelliffe norms and SES through Graffar's Modified Method. Results showed a high correlation between HC values of school-age children from Chile's Metropolitan Region and Tanner, Nellhaus and Roche et al Tables, with similar growth curves; from this manner, HC values of school-age children from Chile's Metropolitan Region not differ significantly from international reference data. HC values were, in general, significantly higher in males than females in all age groups, in students from high SES to compare with other socioeconomic strata and in older school children. This fact was tested too in 1992, in a representative sample of 605 poor school children beneficiaries from the School Feeding Program in Peñalolen and Pirque Counties from Chile's Metropolitan Region with similar results. It can be concluded that HC values of school-age children from Chile's Metropolitan Region were higher in males than females, in high SES compared with medium and low SES and in older students and does not differ significantly from international reference data.
Subject(s)
Cephalometry/statistics & numerical data , Adolescent , Age Distribution , Child , Child, Preschool , Chile , Female , Humans , Intelligence , Male , Nutritional Status , Reference Standards , Sampling Studies , Sex Distribution , Socioeconomic FactorsABSTRACT
The aim of this study was to compare the nutritional status of poor children from urban and rural areas and to quantify the impact of socioeconomic, sociocultural and family variables on nutritional status. Weight/age, height/age, weight/height and head circumference percentages were measured in a representative sample of 4509 school children, 39% belonging to a low socioeconomic status and living in the Metropolitan region, chosen according to grade, type of school, sex and geographic area. Children coming from rural areas had significantly higher percentages of undernutrition than children from urban areas according to weight/age (47 vs 34%, and weight/height (7.7 vs 4.6%); likewise they had a higher proportion of height/age ratios below 90% (10.3 vs 5.2%). Head circumference was below 100% in 77 and 65% of rural and urban children. Brachial anthropometric variables were also lower in rural children. The number of siblings and family size were the independent variables with the greatest explanatory power for weight/age and height/age variations. Mother's instruction in urban areas and crowding, family alcoholism and mother's instruction in rural areas, were the independent variables with the greatest explanatory power for head circumference variation. It is concluded that the significant relationship found between socioeconomic, sociocultural and family variables ad nutritional status is relevant, considering that the sample was homogeneous in each geographic area.
Subject(s)
Nutritional Status , Poverty Areas , Rural Population , Urban Population , Adolescent , Adult , Anthropometry , Child , Child, Preschool , Chile , Female , Humans , Male , Reference Standards , Sampling Studies , Socioeconomic FactorsABSTRACT
The purpose of the present study was to determine the relative importance of different sources of nutrition information used by Chilean schoolers to learn the basics of nutrition. In this respect, a representative sample of 4,509 elementary and high-school children was randomly selected and stratified according to grade, sex, type of school and geographic area. Schoolers were individually interviewed in order to collect data related with socioeconomic status (SES) and sociocultural conditions, as well as to learn as to what they considered to be the most important sources of nutrition information influencing their nutritional learning, gathering the necessary data through a questionnaire especially designed for this purpose. Results indicated that 87.8% schoolers mentioned their family (mainly the mother), as the most important source of nutrition information; 10.7% said the school teacher, and 1.5%, mass media (0.8% television, 0.5% books, 0.1% magazines and 0.1% radio) without significant differences by sex, age and geographic area. The role attributed to the family (mother) was important in all SES categories, but proved to be significantly higher in the high SES group (91.9%) than in the low SES group (84.6%). The role attributed to the school teacher, in contrast, was lower (6.7%) in the high SES group than in the low SES group (13.8%) (p less than 0.001). In relation to mass media, the influence attributed to books and magazines was high in the high SES group, but television and radio were more important in the low SES group. On the other hand, significant differences found by type of school were related to SES. These findings could be useful in the establishment of food and nutrition policies, as well as in educational planning focused on the Chilean school population, considering that few studies have been carried out along these lines.
Subject(s)
Health Education , Nutritional Sciences , Adolescent , Age Factors , Chi-Square Distribution , Child , Chile , Family , Female , Humans , Male , Mass Media , Nutritional Sciences/education , Retrospective Studies , Sampling Studies , Sex Factors , Social Class , Students , Teaching , Urban PopulationABSTRACT
The purpose of this study was to assess the impact of socioeconomic (SE) status over weight and height of school children aged 5-18 years. A representative sample of 4509 school children was randomly chosen from Chile's Metropolitan Region (representative of 38% of the Chilean school population), according to grade, sex, type of school and geographic area. Weight and height were expressed as percentages derived from tables from the WHO. SE status was measured by the Graffar's modified method. Weight and height significantly decreased with SE status in all age groups. No difference was found in weight and height between males and females within SE and age groups. Weight and height in all SE groups were higher in this study compared to previously reported findings. This difference may be related to improvements in socioeconomic and cultural conditions in the last decades.
Subject(s)
Body Height , Body Weight , Socioeconomic Factors , Adolescent , Adult , Child , Child, Preschool , Chile , Female , Humans , Male , Reference Standards , Sex FactorsABSTRACT
A representative sample of 4509 schoolers from elementary and high schools in the Metropolitan area of Santiago was randomly chosen and their nutritional status analyzed by anthropometric measurements. Percentages of weight for age (W/A), height for age (H/A) and weight for height (W/H) were evaluated according to WHO tables. Undernutrition (low W/A) was diagnosed in 31% of males and 28% of females, obesity (increased W/H) in 9% of males and 17% of females and overweight in 18% and 22%, respectively. Undernutrition increased while obesity decreased with age. To a large extent, differences found in nutritional status could be explained by mild growth failure which existed in 27% of males and 28% of females. Therefore, W/H better expresses the nutritional status of these schoolers. The high prevalence of obesity and overweight is a serious health problem demanding preventive measures in order to avoid complications in later life.
Subject(s)
Nutritional Status , Adolescent , Adult , Age Factors , Child , Child, Preschool , Chile/epidemiology , Female , Humans , Male , Obesity/epidemiology , Sex Factors , Socioeconomic Factors , StudentsABSTRACT
The objective of this study was to assess the nutritional status of chilean students by geographic area. In this respect, a representative sample of 4,509 students from elementary and high school was chosen from the Metropolitan Region of Chile (representative of 38.0% of chilean school population). Nutritional status was assessed through anthropometric measurements. Percent weight for age (% W/A), height for age (% H/A) and weight for height (% W/H) were compared with WHO standard; head circumference for age (% HC/A) with Tanner standard; arm circumference for age (% AC/A), triceps skinfold for age (% TS/A), arm muscle area for age (% AMA/A) and arm fat area/age (% AFA/A) with Frisancho norms. Socioeconomic status (SES) was measured through Graffar modified scale. Percent W/H is a better indicator of nutritional status due to growth failure which was thus detected in 27.6% of the whole sample (24.2% and 46.8%, respectively, in urban and rural area, p less than 0.001). According to % W/H, the frequencies of obesity were 13.4% and 10.5%, and those for undernutrition 5.7% and 8.2%, in urban and rural area, respectively, (p less than 0.05). Students from rural area showed significantly lower values for % HC/A, % AC/A, % TS/A and % AFA/A (p less than 0.001). There were no differences for % AMA/A. The fact that 90.5% of rural students belong to low SES must be taken into account to explain differences in the nutritional status of students of different geographic areas.
Subject(s)
Nutritional Status , Adolescent , Adult , Anthropometry , Child , Child, Preschool , Chile , Female , Humans , Male , Reference Values , Rural Population , Urban PopulationABSTRACT
PIP: The nutritional status was assessed of 306 1st grade students from metropolitan Santiago, Chile, equally divided between girls and boys, public and private schools, and low, medium and high socioeconomic groups. The mean age was 6.38 years. Anthropometric measurements taken were weight, height, upper segment, head circumference, arm circumference and triceps skinfold. Percent weight for age, height for age and weight for height were determined according to tables of the National Center for Health Statistics. Expressed as percentage of weight for height, there was a high incidence of obesity (8.9%), and overweight (23.9%), but a low incidence of undernutrition (1%). According to the Waterlow sample distribution, 85.0% of the subjects had adequate nutritional status, 0.3% were wasted, 14% were stunted, and 0.7% were seriously malnourished. Nutritional status was positively and significantly correlated with birth weight, but not with duration of breast feeding. No differences in the duration of breast feeding were found with regard to sex or type of school. More upper status women breast fed for durations less than 6 months, while more lower status women breast fed for more than 6 months. Those from high socioeconomic groups had higher birth weights and better nutritional status. The results indicate an improvement in nutritional status and birth weights of Chilean children, but suggest that intervention should be made to prevent obesity.^ieng
