The first you to definitely included new health quality of meals, intercourse, degrees and you may a changeable denoting nutritional status (overweight/obesity=Body mass index Z-get ?+1)
All of the colleges were categorized because of the Chilean Ministry of Degree into three profile, specifically reasonable-reaching colleges, mid-finding schools and you can higher-reaching universities, reliant the fresh results of its students in all SIMCE screening ( thirty-two ) .
Anthropometric dimensions and 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
Socio-financial updates
Socio-economic position (SES) is mentioned using a scale based on Graffar’s modified method and that is actually adapted so you can Chilean metropolitan and you will rural populations ( Resource Alvarez, Muzzo and you can Ivaple to your four socio-monetary teams: 1=high (0·step three %); 2=mid–high (14·seven %); 3=center (step 38·step 3 %); 4=mid–lowest (45·six %); and 5=low (step one·step one %). Although not, within our analysis we merged these types of five groups toward about three: high (1+2), center (3) and you will lower (4+5) SES.
Mathematical data
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 very own datingranking.net/tr/myladyboydate-inceleme attempt was developed right up out of 13·step one ( sd 2·3) year-dated men (52 %) and you can girls (forty-eight %) teenagers out-of lower (44·3 %), center (39·6 %) and you will high (16·step 1 %) SES. They attended 5th (51·9 %) and you can 9th (48·step one %) grade in public areas (34·8 %), partly subsidized (57·8 %) and private universities (7·4 %) about Santiago Metropolitan Region. In terms of health updates, forty five % out of users was in fact over weight otherwise overweight. Nearly half the young (forty-eight %) went to higher-reaching colleges, while 31 % and 23 % attended mid- and you will reduced-gaining schools, correspondingly.
About test, 56 % out-of college students said use of issues during the snack go out that were saturated in fat, glucose, sodium and energy. Thirty-half a dozen % was considered to have bad-to-reasonable snack, whereas just 8 % was considered to eat suit factors inside snack big date during the college or university. Table step 1 has got the detailed analytics of try. Average beliefs regarding score in the Vocabulary and you may Math was basically somewhat ong people with all the way down health quality of foods in school (P=0·01). The brand new show from students sipping below average edibles in school is actually rather high among 9th graders (59 %; P=0·040), students planning reduced-finding colleges (61 %; P=0·036), and certainly one of skinny and you may regular-pounds participants (69 % and 62 %, respectively; P=0·006).