All of the universities had been classified because of the Chilean Ministry regarding Training towards the around three profile, specifically reasonable-finding universities, mid-reaching colleges and you can large-finding schools, reliant brand new show of the youngsters in every SIMCE assessment ( thirty two ) .
Anthropometric specifications and you may health reputation
Standardized procedures were used to measure students’ weight to the nearest 0·1 kg, using a Seca scale (SECA, Hamburg, Germany), and height to the nearest 0·1 cm, using a Holtain stadiometer. All instruments were verified before measuring each participant ( Reference Gibson 33 ) . BMI (kg/m 2 ) and height-for-age were evaluated, and Z-scores were obtained according to the references of the Centers for Disease Control, National Center for Health Statistics (USA) ( Reference Kuczmarski, Ogden and Guo 34 ) . Nutritional status was defined as follows: underweight, BMI Z-score <?1; normal weight, BMI Z-score from ?1 to +1; overweight, BMI Z-score from +1 to +<2; and obesity, BMI Z-score ?+2.
Socio-monetary status
Socio-economic reputation (SES) try measured playing with a measure predicated on Graffar’s altered strategy and this are adjusted so you can Chilean metropolitan and you will rural communities ( Resource Alvarez, Muzzo and you can Ivaple with the five socio-economic communities: 1=high (0·step three %); 2=mid–highest (14·seven %); 3=middle (step 38·3 %); 4=mid–reasonable (45·six %); and you can 5=reasonable (step 1·step one %). not, within study i merged such five classes for the about three: higher (1+2), center (3) and lowest (4+5) SES.
Analytical study
Statistical analysis included performing ? 2 tests to compare categorical variables, and ANOVA and Bonferroni tests for comparison of continuous variables. After performing bivariate analyses with each potential confounding variable, including sex, grade, nutritional status, SES and school’s performance, we used logistic regression to assess the relationship between the nutritional quality of snacks at school (exposure) and individual academic performance in Mathematics and Language (outcome). In each case, the probability of passing the test was estimated using three models. In the second model, SES was added. Finally, a fully adjusted model contained all mentioned covariates with the addition of a variable denoting the school’s academic performance. Because the variable school’s performance was partly derived from the outcome variables, this adjustment may cause underestimation of the association, so we included models with and without adjustment for school’s performance. A P value of <0·05 denoted statistical significance. Data were processed using the statistical software package Stata SE for Windows version 12·0.
Overall performance
Our try was created right up from thirteen·step one ( sd dos·3) year-old male (52 %) and you may girls (48 %) adolescents from reduced (44·3 %), center (39·6 %) and you may large (16·1 %) SES. It attended fifth (51·9 %) and you will 9th (48·step one %) degree publicly (34·8 %), partially subsidized (57·8 %) and private universities (7·4 %) on the Santiago Metropolitan Part. For nutritional condition, 45 % out of participants had been over weight otherwise overweight. Nearly 1 / 2 of the students (forty-eight %) went to large-achieving colleges, whereas 30 % and you will 23 % went to mid- and you may lowest-gaining universities, correspondingly.
In the shot, 56 % of people claimed consumption of products at snack big date that have been stuffed with fat, glucose, sodium and effort. Thirty-six percent have been regarded as getting terrible-to-reasonable snack, while simply 8 % was considered https://datingranking.net/de/heterosexuelles-dating/ to eat match factors for the treat date in the university. Dining table step one comes with the detailed analytics of your test. Mediocre thinking regarding results in Language and Math were somewhat ong individuals with down nutritional quality of products in school (P=0·01). The fresh new display off people sipping substandard foods at school is actually rather highest among 9th graders (59 %; P=0·040), youngsters likely to reduced-achieving universities (61 %; P=0·036), plus certainly one of underweight and you can regular-weight users (69 % and you will 62 %, respectively; P=0·006).
