Risk of low serum levels of ionized magnesium in children with febrile seizure

BMC Pediatrics

Table 2 Difference in laboratory data between patients with febrile seizures and control patients

Group	Febrile seizure (n = 133)	Control (n = 141)	P-value
Age (year)	2.1 [1.7 ̶ 3.1]	1.9 [1.5 ̶ 3.0]	0.128
Men/Women	73 (54.9)/60 (45.1)	77 (54.6)/64 (45.4)	1.000
Hypocalcemia^a	13 (11.6)	14 (10.6)	0.763
Hypomagnesemia	57 (42.9)	7 (6.9)	< 0.001*
Serum iMg²⁺ (mmol/L)	0.5 ± 0.1	0.6 ± 0.0
Hyponatremia	28 (21.1)	7 (5.0)	< 0.001*
Serum Na (mmol/L)	136.0 [135.0;137.0]	138.0 [137.0; 139.0]
Hypokalemia	3 (2.3)	5 (3.5)	0.783

Data are presented as medians [inter-quartile ranges] for non-normally distributed variables, as means ± standard deviations for all normally distributed continuous variables, and as n (%) in the case of countable variables. Normal pediatric ranges as follows: Ca (9.2–10.6 mg/dL), iMg²⁺ (0.50–0.70 mmol/L), Na (135–145 mmol/L), and K (3.6–5.2 mmol/L). ^aTotal calcium levels were not tested in several patients (21 in the febrile seizure group and nine in the control group). n, number of patients. ^*Significant

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