No. of participants (No. of studies) | Design | Quality assessment | Absolute effect | Quality | |||
---|---|---|---|---|---|---|---|
Risk of bias | Inconsistency | Indirectness | Imprecision | ||||
The mean age was 4.4 years. Data were collected cross-sectionally. Bone and skeletal health were assessed objectively using quantitative ultrasound. | |||||||
1512 (1) | Cross-sectionala | Serious risk of biasb | No serious inconsistency | No serious indirectness | Serious imprecisionc | Objectively measured sedentary time: After adjusting for MVPA, accelerometer-derived sedentary time was no longer significantly associated with bone stiffness index (SI) in preschool children (β = -0.37; R2 = 19%; p = 0.28) [125]. Screen-based sedentary behaviours: There was no association between parent-reported screen time and SI (β = −0.04; R2 = 18.4%; p = 0.50) [125]. | Very lowd |