Table 1

Comparisons of cognitive and biochemical statistics for groups with three indicators of iron deficiency parameters and those without deficiencies*

	Iron deficiency parameters	N	Arithmetic mean	SD	SE of the mean
Verbal intelligence	NO	88	108.10	15.48	1.65
Verbal intelligence	YES	12	109.75	15.93	4.60
Non-verbal Intelligence	NO	88	112.32 a	14.40	1.53
Non-verbal Intelligence	YES	12	102.92 a	13.81	3.98
IQ Full-scale IQ	NO	88	111.15	14.63	1.56
IQ Full-scale IQ	YES	12	107.92	14.95	4.32
Information	NO	88	9.60	3.33	0.35
Information	YES	12	10.42	3.63	1.05
Similarities	NO	88	12.26	2.67	0.28
Similarities	YES	12	12.75	3.39	0.98
Arithmetic	NO	88	10.95	3.12	0.33
Arithmetic	YES	12	11.83	3.35	0.97
Vocabulary	NO	88	10.93	3.05	0.32
Vocabulary	YES	12	10.08	2.68	0.77
Comprehension	NO	88	12.33	3.25	0.35
Comprehension	YES	12	12.67	2.74	0.79
Number Sequencing	NO	88	10.45	2.98	0.32
Number Sequencing	YES	12	10.08	3.15	0.91
Picture completion	NO	88	9.96	2.73	0.29
Picture completion	YES	12	9.33	2.39	0.69
Picture concepts	NO	88	12.81	3.55	0.38
Picture concepts	YES	12	11.67	3.23	0.93
Block design	NO	88	11.92	2.89	0.31
Block design	YES	12	10.59	2.35	0.68
Puzzles Matrix Reasoning	NO	88	11.61	3.59	0.38
Puzzles Matrix Reasoning	YES	12	10.83	3.61	1.04
Coding	NO	88	12.44 b	3.04	0.32
Coding	YES	12	9.58 b	1.93	0.56
Disease duration	NO	88	4.80 c	3.48	0.37
Disease duration	YES	12	2.58 c	3.92	1.13
HGB	NO	88	13.88 d	1.08	0.12
HGB	YES	12	11.82 d	2.03	0.59
HCT	NO	88	39.54 e	3.05	0.33
HCT	YES	12	33.68 e	4.08	1.12
RBC	NO	88	4.75 f	0.39	0.042
RBC	YES	12	4.13 f	4.13	0.12
MCV	NO	88	83.49	5.21	0.56
MCV	YES	12	81.08	8.53	2.46
MCHC	NO	88	35.10	1.04	0.11
MCHC	YES	12	34.91	3.03	0.87
MCH	NO	88	29.30	1.70	0.18
MCH	YES	12	28.30	3.68	1.06
HbA1C	NO	88	9.92	2.44	0.29
HbA1C	YES	12	9.52	2.05	0.72
Iron, mol/dL	NO	88	108.47	34.62	3.69
Iron, mol/dL	YES	12	102.85	34.78	10.04
Age of onset	NO	88	7.24	3.19	0.34
Age of onset	YES	12	8.92	3.37	0.97
Duration of the illness	NO	88	4.78 g	3.45	0.37
Duration of the illness	YES	12	2.58 g	3.92	1.13
Sex	Girls=55 Boys=45
Age	Mean=11.95 Median=12.00 Mode=15.00 SD=2.85 Minimum=6 Maximum=16

Arithmetic mean a, b, c, d, e, f, g—statistically significant differences at <0.05.
*Individual differences identified as statistically significant for the indicated characteristics are the differences between the individuals with and without anemia.
HbA1c, glycosylated hemoglobin; HCT, hematocrit; HGB, hemoglobin; MCHC, mean corpuscular hemoglobin in RBC; MCV, RBC volume; RBC, red blood cells.