Anemia status of infants and young children aged six to thirty-six months in Ma'anshan City: A retrospective study

Table 2 Mean hemoglobin levels for different genders in each age group

Age	Gender	n	Hb (g/L), mean ± SD	t	P value
6 mo	Male	15244	119.38 ± 10.45	-1.415	0.157
	Female	14047	119.55 ± 9.81
9 mo	Male	3821	117.07 ± 10.69	-0.611	0.541
	Female	3284	117.22 ± 10.17
12 mo	Male	9065	121.61 ± 10.56	3.583	0.000
	Female	8309	121.05 ± 10.06
24 mo	Male	7704	126.69 ± 9.55	1.415	0.157
	Female	7095	126.46 ± 9.54
36 mo	Male	2562	126.81 ± 9.03	-0.774	0.439
	Female	3277	127.00 ± 9.31

Hb: Hemoglobin.