What question did this study set out to answer?

To examine whether levels of cardiorespiratory fitness, grip strength, or physical activity modify the associations between discretionary screen time and all-cause mortality, cardiovascular disease, and cancer.

May 22, 2018BMC MedicineOpen Access

Associations of discretionary screen time with mortality, cardiovascular disease and cancer are attenuated by strength, fitness and physical activity: findings from the UK Biobank study

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Authors

CCCarlos Celis‐MoralesPreventive Cardiology DLDonald M. LyallUniversity of Ulster LSLewis SteellCumbria Northumberland Tyne and Wear NHS Foundation Trust

Discussion

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Implication

Cohort study finds that muscular strength and fitness attenuate mortality and cardiovascular risks of screen time in adults, indicating sedentary risks depend on physical fitness.

Key Points

To examine whether levels of cardiorespiratory fitness, grip strength, or physical activity modify the associations between discretionary screen time and all-cause mortality, cardiovascular disease, and cancer.
Prospective cohort study of 390,089 participants (54% women) from the UK Biobank followed for a median of 5.0 years (interquartile range 4.3 to 5.7).
Evaluated leisure television viewing, personal computer screen time, and total discretionary screen time, analyzing effect modification across tertiles of grip strength, cardiorespiratory fitness, and physical activity.
During follow-up, 7,420 participants died and 22,210 cardiovascular disease (CVD) events occurred.
In the lowest grip-strength tertile, each 2-hour increase in screen time was strongly associated with all-cause mortality (hazard ratio [HR] 1.31, 95% CI 1.22–1.43, p < 0.0001), CVD (HR 1.21, 95% CI 1.13–1.30, p = 0.0001), and cancer incidence (HR 1.14, 95% CI 1.10–1.19, p < 0.0001).
In the highest grip-strength tertile, associations were attenuated for all-cause mortality (HR 1.04, 95% CI 0.95–1.14, p = 0.198), CVD (HR 1.05, 95% CI 0.99–1.11, p = 0.070), and cancer (HR 0.98, 95% CI 0.93–1.05, p = 0.771), with similar attenuation seen for higher fitness and physical activity.

Cite This Study

Celis‐Morales et al. (2018) studied this question.

synapsesocial.com/papers/6a105acf28c2d29469fe6da1 https://doi.org/10.1186/s12916-018-1063-1

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Implication

Cohort study finds that muscular strength and fitness attenuate mortality and cardiovascular risks of screen time in adults, indicating sedentary risks depend on physical fitness.

Associations of discretionary screen time with mortality, cardiovascular disease and cancer are attenuated by strength, fitness and physical activity: findings from the UK Biobank study

Discussion

Member takes

Implication

Key Points

Cite This Study

Associations of discretionary screen time with mortality, cardiovascular disease and cancer are attenuated by strength, fitness and physical activity: findings from the UK Biobank study

Discussion

Member takes

Implication

Key Points

Cite This Study

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