Table 1
Risk factors for recurrence of febrile seizure

Factor Without recurrences With recurrences Total P-value*
Sex Male 77 (55.8) 73 (57.5) 150 (56.6) 0.782
Female 61 (44.2) 54 (42.5) 115 (43.4)
F/Hx of FS (missing data 7) (+) 31 (23.1) 64 (51.6) 95 (36.8) <0.001
(-) 103 (76.9) 60 (48.4) 163 (63.2)
Day care (+) 74 (53.6) 112 (88.2) 186 (70.2) <0.001
(-) 64 (46.4) 15 (11.8) 79 (29.8)
Age of 1st event (n=190) <12 mo 16 (11.6) 8 (15.4) 24 (12.6) 0.483
≥12 mo 122 (88.4) 44 (84.6) 166 (87.4)
Temperature (missing data 3) <39°c 35 (25.7) 31 (24.6) 66 (25.2) 0.833
≥39°c 101 (74.3) 95 (75.4) 196 (74.8)
Duration of fever (missing data 1) <24 hr 75 (54.7) 89 (70.1) 164 (62.1) 0.010
≥24 hr 62 (45.3) 38 (29.9) 100 (37.9)
Duration of seizure (missing data 1) <15 min 128 (93.4) 123 (96.9) 251 (95.1) 0.199
≥15 min 9 (6.6) 4 (3.1) 13 (4.9)
Upper respiratory infection (+) 90 (65.2) 100 (78.7) 190 (71.7) 0.015
(-) 48 (34.8) 27 (21.3) 75 (28.3)
Hyponatremia (missing data 5) <135 mEq/L 10 (7.5) 2 (1.6) 12 (4.6) 0.024
≥135 mEq/L 124 (92.5) 124 (98.4) 248 (95.4)
CRP (missing data 5) <0.3 mg/dL 40 (29.9) 34 (27.0) 74 (28.5) 0.680
≥0.3 mg/dL 94 (70.1) 92 (73.0) 186 (71.5)
Leukocytosis (missing data 6) <15,000/μL 105 (78.9) 105 (83.3) 210 (81.1) 0.428
≥15,000/μL 28 (21.1) 21 (16.7) 49 (18.9)
Neutrophilia (missing data 6) <70% 100 (75.2) 96 (76.2) 196 (75.7) 0.886
≥70% 33 (24.8) 30 (23.8) 63 (24.3)
Values are presented as number (%).
FS, febrile seizure; F/Hx, family history; CRP, C-reactive protein.
*Analysis performed by chi-square test.