Investigation findings in learning difficulties and control groups
| Investigation | Learning difficulties (n=104) | Controls (n=80) | p Value |
|---|---|---|---|
| Anaemic (%) with haemoglobin < 115.0 g/l | 12 (11) | 1 (1.2) | 0.007 |
| Iron depleted (%) iron < 11 μmol or saturation < 16% | 20 (19) | 7 (9) | 0.05 |
| Haemoglobin g/l, mean (SD) | 123.0 (7.0) | 128.0 (7.0) | < 0.0001 |
| % Saturation, mean (SD) | 24 (8.4) | 27.8 (8.4) | 0.002 |
| Iron (μmol/l), mean (SD) | 14.5 (5.1) | 17.1 (8.0) | 0.01 |
| Fragile X detected | No cases | NA | |
| Abnormal TFTs | No cases | NA | |
| Abnormal amino acid chromatography | No cases | NA |
TFTs = thyroid function tests.