Table 2. Comparison of age-adjusted and sex-adjusted mean laboratory parameters*.
| Laboratory parameter | Negative serum testing (n) | Age-adjusted and sex-adjusted mean if serum tests negative | Positive serum testing (n) | Age-adjusted and sex-adjusted mean if serum tests positive | p |
|---|---|---|---|---|---|
| Hemoglobin (g/dL) | 12508 | 13.0 | 97 | 12.9 | 0.1493 |
| Hematocrit (%) | 12509 | 38.3 | 97 | 38.0 | 0.2385 |
| MCV (fl) | 12509 | 82.9 | 97 | 82.4 | 0.1169 |
| Ferritin (μ56;g/L) | 11580 | 36.2 | 93 | 31.8 | 0.0316 |
| RBC folate (ng/mL) | 6893 | 497.8 | 51 | 448.9 | 0.0344 |
| Total protein (g/dL) | 12543 | 7.4 | 96 | 7.5 | 0.4792 |
| 25-hydroxycholecalciferol (nmol/L) | 9013 | 46.4 | 70 | 46.5 | 0.9811 |
| TSH (μ56;U/mL) | 11693 | 2.4 | 93 | 2.4 | 0.9658 |
| Gamma GT (U/L) | 12613 | 12.2 | 97 | 12.2 | 0.9990 |
| Vitamin B12 (ng/L) | 11675 | 599.8 | 93 | 591.2 | 0.7228 |
*Of 12 741 children and adolescents with negative and positive celiac disease–specific antibodies
MCV: Mean corpuscular volume; RBC: Red blood cell; TSH: Thyroid-stimulating hormone