See the recent "Relationship between iron deficiency anemia IDA and febrile seizures FS in children: A systematic review and meta-analysis." Kwak BO, Kim K, Kim SN, Lee R.Seizure. 2017 Nov;52:27-34. doi: 10.1016/j.seizure.2017.09.009. The meta-analysis included 17 studies enrolling 2416 children with FS and 2387 controls. IDA was significantly associated with FS (OR, 1.98; 95% CI, 1.26-3.13; P=0.003). Subgroup analyses evaluated the diagnostic indices for IDA including serum iron, plasma ferritin, and mean corpuscular volume (MCV). IDA diagnosed on the basis of plasma ferritin (OR, 3.78; 95% CI, 1.80-7.94; P