Recommendations on screen time, sleep and physical activity: associations with academic achievement in Swiss adolescents

OBJECTIVES

This study aimed to investigate how meeting international recommendations for screen time (<2 h/day), moderate-to-vigorous physical activity (MVPA; at least 60 min/day) and sleep (8-10 h/night), as well as media multitasking (MMI) as a form of screen time, impact academic achievement in early adolescence.

STUDY DESIGN

A prospective design was used, where self-report measures were collected during the spring semester and academic achievement at the end of the school year.

METHODS

A total of 1208 grade 3 middle school students (M_age = 13.55 years, SD_age = 0.60) in 37 Swiss schools filled out a paper-and-pencil questionnaire including measures of screen time (covering watching television, playing video games, Internet use, smartphone use and social media use), MMI, sleep time and time for MVPA. To evaluate academic achievement, end-term grades were provided by the collaborating education administration for Italian, Maths, Science, History, Geography, Music and Visual arts.

RESULTS

After adjustment for covariates, such as gender, socio-economic status, body mass index and stressful life events, multivariate linear mixed-effect models, nesting participants in schools, showed that meeting recommendations for screen time (B = 0.12, β = 0.105, P < 0.001) and MVPA (B = 0.09, β = 0.09, P = 0.001), but not sleep (B = 0.05, P = 0.087), were associated with higher academic achievement. Considering the number of recommendations met, meeting all three recommendations improved academic achievement the most (B = 0.24, β = 0.21, P < 0.001), followed by meeting the guidelines for screen time + MVPA (B = 0.20, β = 0.15, P < 0.001) and for screen time + sleep (B = 0.21, β = 0.13, P < 0.001). In the fully adjusted model, multitasking with two or more media was related to a worse academic achievement.

CONCLUSIONS

Screen time (including MMI), sleep and MVPA impact academic achievement in adolescence; hence, governmental organisations and schools should raise awareness about the positive and negative effects of following or not recommendations for MVPA, sleep and screen time among adolescents and their parents. In addition, support should be provided to promote sufficient sleep and MVPA while limiting overall screen time and parallel device use.

High-grade poorly differentiated retroperitoneal sarcoma. Report of a case and review of the literature

Retroperitoneal sarcomas (RPS) are uncommon tumors associated with a poor prognosis. This is particularly true in case of high-grade sarcomas of specific histological subtypes, as demonstrated by the largest surveys of the last decade. Up to the present day, unfortunately there are no powerful tools available except for surgery. On the other hand, the resection rate of RPS is significantly increased over the last decades allowing to deliver the best treatment available. This paper reports on the case of a young patient who was incidentally diagnosed with a retroperitoneal mass. The patient underwent surgery in our department and the histological report showed a spindle cell sarcoma of high grade of malignancy with an incomplete muscular phenotype. The patient was discharged on the seventh postoperative day and he is still free of local and distant recurrence.