Table 3 Demographic descriptive statistics of RLS cases and controls in the DBDS cohort with available c-aAb data and RLS data (N = 1478).

From: Chronic inflammation markers and cytokine-specific autoantibodies in Danish blood donors with restless legs syndrome

 

Controls N = 1403

RLS cases N = 75 (5.1%)

P valuea

N

%

N

%

Sex

Male

785

56.0

38

50.7

0.369

Female

618

44.0

37

49.3

 

Age

Years, median (IQR)

39.4 (29.9–47.3)

 

40.2 (31.3–48.3)

 

0.532

BMI

Median (IQR)

25.1 (23.0–27–8)

 

25.0 (22.1–27.9)

 

0.417

 < 18.5

10

0.7

0

0.0

0.736

18.5–25

684

48.8

38

50.7

 

25–30

528

37.6

30

40.0

 

30–35

135

9.6

 < 5

 < 6.7

 

35–40

38

2.7

 < 5

 < 6.7

 

 > 40

8

0.6

 < 5

 < 6.7

 

Smoking status

Non-smoker

1248

89.0

67

89.3

0.938

 < 1 cigarette per day

49

3.5

 < 5

 < 6.7

 

 > 1 cigarette per day

106

7.6

5

6.7

 

Duration between donation date for C-aAb measurement and RLS questionnaire completion

Years, median (IQR)

6.5 (5.8–7.1)

 

6.5 (5.8–7.1)

 

0.729

  1. C-aAb cytokine-specific autoantibody, IQR interquartile range.
  2. aFor comparison of the two groups, chi-square test was used for categorical variables and Kruskal–Wallis rank test was used for continuous variables.
Back to article page