Serum ferritin levels in children with attention deficit hyperactivity disorder and tic disorder

Table 5 Comparison of serum ferritin in different age groups

Age (yr)	HC	ADHD	TD
5	63.15 ± 52.54	28.77 ± 17.54	29.73 ± 21.55
6	65.05 ± 48.64	31.66 ± 16.38	32.68 ± 16.54
7	75.24 ± 55.18	33.78 ± 19.16	33.99 ± 19.48
8	79.05 ± 53.37	37.93 ± 20.34	36.63 ± 16.76
9	77.88 ± 52.77	43.27 ± 22.41	41.92 ± 23.44
10	77.10 ± 49.96	43.59 ± 21.15	40.74 ± 18.28
11	68.65 ± 49.32	42.36 ± 24.06	38.17 ± 25.55
12	66.85 ± 52.22	32.66 ± 18.77	39.16 ± 28.08
F	3.651	14.206	9.381
P	0.001	0.000	0.000

HC: Healthy control; ADHD: Attention deficit hyperactivity disorder; TD: Tic disorder.