Independent and combined effects of lifestyle behaviors on adolescent health-related quality of life.
Dartagnan Pinto Guedes, Bruna Hatsue Santos Yamaji, Marizete Arenhart Zuppa
PMID 37820155WHAT IT FOUND
Adolescents who slept 8-10 hours/night or had 2 hours/day or less of recreational screen time reported higher health-related quality of life.
Those with three or four healthy behaviors were more likely to report high health-related quality of life.
Key findings
01Adolescents reporting 2 hours/day or less of recreational screen time and those sleeping 8-10 hours/night had higher overall health-related quality of life scores.
02Physical activity and fruit/vegetable intake examined separately were not significantly associated with overall health-related quality of life scores.
03Adolescents with three or four healthy behaviors had higher health-related quality of life scores than those with none, and were about two to three times more likely to report high health-related quality of life.
STILL TO COME
How it was doneWhat they foundWhat it means for RNs
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What it does not show
The study was cross-sectional, so it cannot show that changing sleep, screen time, physical activity, or diet caused higher health-related quality of life. Lifestyle behaviors and health-related quality of life were self-reported, which can introduce bias toward desirable answers. All participants came from one high school in one region of Brazil, so the results may not apply to other settings or populations. Residual confounding is possible because other factors, including family environment and peer relationships, were not measured. Physical activity and fruit/vegetable intake were not independently associated with overall health-related quality of life, so single-behavior advice may oversimplify the findings.
The easy way to misread this
Do not conclude that improving sleep or reducing screen time caused higher health-related quality of life. This was a cross-sectional self-report study, so it shows association at one time point, not the effect of changing behavior.