Table 6 Risk of severe febrile seizures by month of year

January

0.72

0.42, 1.24

0.12

February

1.13

0.70, 1.83

0.51

March

1.15

0.71, 1.85

0.46

April (Reference)

1.00

–

–

May

1.54

0.98, 2.41

0.014

June^*

2.17

1.42, 3.31

< 0.0001

July^*

2.06

1.34, 3.15

< 0.0001

August^*

2.54

1.68, 3.34

< 0.0001

September^*

2.43

1.60, 3.68

< 0.0001

October^*

1.91

1.24, 2.94

0.00012

November

1.46

0.93, 2.31

0.031

December

1.50

0.95, 2.36

0.021