Background Early childhood is a critical period for growth and development, yet the
association with physical activity during this important period is unknown. The aim of this …

Importance Currently, there is a lack of consensus in the literature on the association
between screen time (eg, television, video games) and children's behavior problems …

Although children's increased screen time has been found to associate with poorer
language development, it is open to question which part of language ability screen time …

Importance Young children's screen time increased during the COVID-19 lockdown in 2020,
but it is unknown whether their screen time returned to prepandemic levels in 2021 …

Background Missing data are common in observational studies and often occur in several of
the variables required when estimating a causal effect, ie the exposure, outcome and/or …

This study investigated family contextual effects on the association between screen time,
behaviour and health-related quality of life (HRQOL) in child siblings. Data were from 1772 …

Purpose To examine the longitudinal associations of subjectively-measured physical activity
(PA) and screen time with multiple domains of cognitive development in a sample of young …

The time that parents spend teaching and playing with their young children has important
consequences for later life achievement and attainment. Previous research suggests that …

Preschoolers spend most of their sedentary time interacting with screens. Studies on
developmental consequences of screen time have focused on isolated domains (eg …

Background To investigate whether time spent in educational activities at 2–3 years and
developmental outcomes at school entry differ among children from different socioeconomic …