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Table 2 Characteristics of patients with iron deficiency anemia (IDA) and control subjects
| Characteristics | IDA | Control | p-value |
|---|---|---|---|
| No. | 2957 | 11828 | |
| Age (years) | 10.59 ± 6.02 | 10.59 ± 6.02 | |
| Sex, N (%) | |||
| Male | 1060 (35.8) | 4240 (35.8) | |
| Female | 1897 (64.2) | 7588 (64.2) | |
| Associated diseases, N (%) | |||
| Schizophrenia | 8 (0.3) | 14 (0.1) | 0.063 |
| Unipolar depressive disorder | 48 (1.6) | 66 (0.6) | <0.001 |
| Bipolar disorder | 13 (0.4) | 7 (0.1) | <0.001 |
| OCD | 4 (0.1) | 8 (0.1) | 0.274 |
| Anxiety disorder | 45 (1.5) | 80 (0.7) | <0.001 |
| ASD | 24 (0.8) | 32 (0.3) | <0.001 |
| ADHD | 84 (2.8) | 207 (1.8) | <0.001 |
| Tic disorder | 23 (0.8) | 56 (0.5) | 0.044 |
| Delayed development | 154 (5.2) | 278 (2.4) | <0.001 |
| Mental retardation | 75 (2.5) | 114 (1.0) | <0.001 |
