Table 4.

Association between sleep duration and motor development in children aged 0–4 years

No of studies	Design	Quality Assessment					No of participants	Absolute effect	Quality
		Risk of bias	Inconsistency	Indirectness	Imprecision	Other
Mean age ranged between 7.4 months and 13 months. Data were collected cross-sectionally only. Sleep duration was assessed by actigraphy or parent report. Motor development was assessed using the Ages and Stages Questionnaire in both studies.
2	Cross-sectional studya	No serious risk of bias	No serious inconsistency	No serious indirectness	No serious imprecision	None	1403	Sleep duration was not associated with gross and fine motor skills [38, 51].	LOW

Due to the fact that only two studies were published on sleep duration and motor development (with different methodologies and age groups), a meta-analysis was not possible

^aIncludes 2 cross-sectional studies [38, 51]