Table 2. Demographic characteristics of mothers.

		n		%
Age (years)	<20	107		5.3
	21–25	496		24.6
	26–30	683		33.8
	31–39	646		32.0
	40≥	86		4.3
Education	No education	37		1.8
	1–8 years	722		36.0
	8–12 years	764		38.1
	>12 years	483		24.1
Socioeconomic group	Low	519		25.9
	Middle	806		40.2
	High	651		32.5
		Min	Max	X±SD
Age (years)		16	53	28.8±5.5