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Table 1 Differences in demographics and seasonal variations

From: Is juvenile dermatomyositis a different disease in children up to three years of age at onset than in children above three years at onset? A retrospective review of 23 years of a single center’s experience

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