Fig 1.
PRISMA flow diagram for selection and inclusion of the eligible studies.
Table 1.
Characteristics of the included studies, assessment of physical activity and sedentary behavior among children and adolescents.
Table 2.
Measurement of HRQOL and the main findings of the included studies.
Fig 2.
Forest plot of the mean difference in PedsQL total scores between physically active and inactive children and adolescents.
Study by Lacy et al. 2011 has two groups: adolescents <15 years (Lacy et al. 2011); adolescents ≥15 years (Lacy2 et al. 2011).
Fig 3.
Forest plot of the mean difference in PedsQL total scores between screen time of sedentary behavior.
Study by Gopinath et al. has two groups by screen time: the first group (Gopinath, et al. 2012) indicates 2nd tertile of screen time 2.57–3.86 hours relative to the non-sedentary group (≤2.5 hours/day); the second group (Gopinath2, et al. 2012) indicates 3rd tertile of screen time ≥3.93 hours relative to the non-sedentary group. Study by Lacy et al. has two groups by age of the adolescents: <15 years in the first group (Lacy et al., 2011); and ≥15 years in the second group (Lacy2 et al., 2011); the non-sedentary (reference) group is defined as total daily screen time≤2.0 hours/day.