Table 5.

Comparison of 4-month-old infant development according to maternal age group

Development item (KIDS)	Maternal age
	Teens (n = 2)a	20s (n = 106)b	30s (n = 165)c	40s (n = 10)d	p value	Post hoc
Motor score	11.0 [10–12]	10.0 [2–13]	10.0 [4–13]	10.5 [6–11]	0.752
Motor skills	10.5 [9–12]	11.0 [6–14]	10.0 [5–14]	11.5 [9–14]	0.444
Language comprehension	5.5 [5–6]	7.0 [1–8]	7.0 [2–8]	7.0 [4–8]	0.577
Verbalization	7.5 [7–8]	6.0 [3–8]	6.0 [2–8]	7.5 [5–8]	0.037	b and d*, c and d*
Sociability with adults	9.0 [6–12]	13.0 [8–17]	13.0 [6–18]	13.5 [10–19]	0.217
Diet	4.0 [4–6]	4.0 [2–7]	4.0 [0–7]	4.0 [2–7]	0.819

* p < 0.05

Data are presented as the median with the range in square brackets

Maternal age

^aTeens

^b20s

^c30s

^d40s