The association between higher body mass index and poor school performance in high school students.
BACKGROUND/OBJECTIVE
This study aimed to examine the association between body mass index (BMI) and school performance in high school students by controlling for relevant mediators such as sleep quality, sleep duration and socioeconomic status.


METHODS
Thirty-seven high school students (mean age: 18.16 ± 0.44 years) attending the same school type, i.e. 'liceo scientifico' (science-based high school), were enrolled. Students' self-reported weight and height were used to calculate BMI. Participants wore an actigraph to objectively assess the quality and duration of sleep. School performance was assessed through the actual grade obtained at the final school-leaving exam, in which higher grades indicate higher performance.


RESULTS
BMI, get-up time, mean motor activity, wake after sleep onset and number of awakenings were negatively correlated with the grade, while sleep efficiency was positively correlated. When performing a multiple regression analysis, BMI proved the only significant (negative) predictor of grade.


CONCLUSIONS
When controlling for sleep quality, sleep duration and socioeconomic status, a higher BMI is associated with a poorer school performance in high school students.
['Tonetti|L|L|', 'Fabbri|M|M|', 'Filardi|M|M|', 'Martoni|M|M|', 'Natale|V|V|']
D000293:Adolescent D015992:Body Mass Index D004522:Educational Status D005260:Female D006801:Humans D008297:Male D012044:Regression Analysis D012574:Schools D057566:Self Report D012890:Sleep D013334:Students
Body mass index school performance sleep quality sleep duration