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Table 1 Demographic data of all patients and controls

From: Environmental factors in early childhood are associated with multiple sclerosis: a case-control study

Characteristic

Controls, N = 296

MS patients, N = 245

 

n (%)

n (%)

Age, years

  

Median (IQR)

40.0 (27-54)

46.0 (37-54)

Age group, (based on sample quartiles)

  

≤ 31

107 (36.3)

29 (11.8)

32-43

63 (21.4)

73 (29.8)

44-54

52 (17.6)

84 (34.3)

≥ 55

73 (24.7)

59 (24.1)

Female

182 (61.5)

181 (73.9)

Day care 0-3

117 (40.3)

61 (25.4)

Past medical history

  

Asthma

24 (8.1)

6 (2.4)

Diabetes mellitus

4 (1.4)

5 (2.0)

Rheumatic diseases

6 (2.0)

3 (1.2)

Residence age 0-6

  

< 10000

24 (8.9)

42 (17.7)

10000-100000

68 (25.3)

61 (25.7)

> 100000

177 (65.8)

134 (56.5)

Number of older siblings

  

0

135 (46.7)

125 (51.7)

1

76 (26.3)

82 (33.9)

2

49 (17.0)

31 (12.8)

≥ 3

29 (10.0)

4 (1.7)