Table 1.
Summary of Previous Studies that Included ADHD and Serum Ferritin
| Study | Participant characteristics | Ages (yrs) | M:F | ADHD group ferritin level μg/L±SD (n) | Control group ferritin level μg/L±SD (n) | p value |
|---|---|---|---|---|---|---|
| Konofal et al. 2004, France | ADHD-excluding other psych diagnoses and behavioral disordersa | 4–14 | 6:1 | 23±13 (53) | 44±22 (27) | <0.001 |
| Controls-have reading disorders | ||||||
| Konofal et al. 2007, France | ADHD+RLS-excluding other psych and physical disordersa | 5–9 | 3:1 | 16±6 (12) | 46±18 (10) | <0.0005 |
| Controls referred but no psych disordersa | ||||||
| Millichap et al. 2006, U.S. | ADHD: no mention of comorbidities Controls – national sample (NHANES) | 5–16 | 4:1 | 40±41 (68) | NHANES grouped by age | >0.2 |
| Juneja et al. 2010, India | ADHD: with comorbidities Controls: age and sex matched | 6–14 | 6:1 | 6.0±3.9 (25) | 49±42 (25) | <0.001 |
| Menegassi et al., 2010, Brazil | ADHD: on stimulant ADHD: not on stimulant | 6–15 | 4:1 | 59±21 (19)54±17 (22) | 59±29 (21) | 0.72 |
| Controls: no diagnosis | ||||||
| Donfrancesco et al. 2012, Italy | ADHD: stimulant naïve Controls: group matched for age and gender | 6–14 | 10:1 | 33±11 (101) | 33±19 (93) | 1.00 |
a
Diagnosed with standardized interview.
ADHD, attention-deficit/hyperactivity disorder; RLS, restless leg syndrome; NHANES, National Health and Nutrition Examination Survey.