Table 12 Risk of febrile seizures in children 3–5 years old by month of year

January

1.03

0.57, 1.83

0.91

February

1.28

0.74, 2.22

0.24

March

1.18

0.67, 2.07

0.45

April (Reference)

1.00

–

–

May^*

1.77

1.06, 2.96

< 0.0044

June^*

2.87

1.78, 4.64

< 0.0001

July^*

2.56

1.58, 4.17

< 0.0001

August^*

3.49

2.18, 5.57

< 0.0001

September^*

3.00

1.86, 4.83

< 0.0001

October^*

1.74

1.04, 2.93

0.0056

November^*

1.74

1.04, 2.93

0.0056

December

1.44

0.84, 2.46

0.083