Table 2.

Characteristics of studies included in the systematic review and/or meta-analysis

Reference	Country	Study design	Population		Breast feeding		MD outcome
			Sample size	Sample age	Categories	n	Tool	Measurement
First author′s name and year of publication	Country	Design of the study	Number of participants	Age of participants (years)	Duration: periods of exclusive breast feeding/any breast feeding	Number of participants in each breastfeeding category	Instrument used to measure MD	Mean value (SD)

MD, motor development.