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. 2012 Sep 20;10:34. doi: 10.1186/1546-0096-10-34

Table 1.

Differences in demographics and seasonal variations

Demographics 3 years of age and below at onset n = 19 Above 3 years of age at onset n = 59 Total patients p-value
Average age of onset in months
27
90
78
 
Females: Males
16/3 (5.3:1)
35/24 (1.4:1)
78
 
Onset Late Winter – Early Spring (January-May)
11 (57%)
46 (78%)
78
0.031
Onset Summer (June-September)
5 (26%)
6 (10%)
78
0.042
Onset Autumn (October-December) 3 (15%) 7 (12%) 78 0.657