Table 3. Dose – Response relationship between plasma ferritin levels or the proportion of patients with iron deficiency and the number of seizures a child had during the acute illness.

Number of seizures	Linear Score	Number of patients	Median (IQR) plasma ferritin, µg/mL*	Number (%) with iron deficiency**
0 (Controls)	0	133	106 (33–299)	36 (27.1)
1	1	77	102 (29–299)	27 (35.1)
2	2	26	127 (56–210)	9 (34.6)
3	3	17	182 (62–303)	4 (23.5)
4 or more	4	13	219 (53–357)	3 (38.5)

*Test for linear trend; z = 1.46 and p = 0.143.

**Test for linear trend; z = 0.75 and p = 0.455.