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Table 2 Sensitivity and specificity of autoantibodies before onset of disease symptoms in individuals who later developed SLEa

From: Autoantibodies predate the onset of systemic lupus erythematosus in northern Sweden

 

Presymptomatic individuals

     

Autoantibodies

Sensitivity, n(%)

Specificity n%

Controls, n(%)

OR

95% CI

Pvalueb

LR

ANA

16 (45.7)***

95.0

10 (6.7)

11.5

4.54 to 28.87

<0.0001

9.14

dsDNA

7 (20.0)***

98.7

2 (1.4)

18.13

3.58 to 91.84

<0.0001

15.38

Ro/SSA

7 (20.0)***

97.4

4 (2.7)

8.94

2.45 to 32.58

<0.0001

5.56

Histone

5 (14.3)**

98.0

3 (2.0)

8.06

1.83 to 35.54

<0.001

7.15

RNP

4 (11.4)**

98.7

2 (1.4)

9.36

1.64 to 53.36

<0.01

8.77

La/SSB

3 (8.6)**

100

0

    

Jo-1

3 (8.6)*

98.7

2 (1.4)

6.80

1.09 to 42.36

<0.05

6.62

Scl-70

2 (5.7)

99.3

1 (0.7)

8.85

0.78 to 100.51

ns

8.0

Sm

1 (2.9)

100

0

    

Centromere protein B

(2.9)

98.7

1 (0.7)

4.29

0.26 to 70.39

ns

1.54

  1. a95% CI, 95% confidence interval; bP values were determined by using χ2 test or Fisher's exact test as appropriate. . * = p < 0.05, **= p < 0.01, ***= p < 0.001
  2. ANA, antinuclear antibody; dsDNA, double-stranded DNA; Jo-1, anti-histidyl-tRNA synthetase antibody; La/SSB, anti-Sjögren's syndrome antigen B; LR, positive likelihood value; ns, not significant; OR, odds ratio; RNP, ribonucleoprotein; Ro/SSA, anti-Sjögren's syndrome antigen A; Scl-70, scleroderma 70; Sm, Smith.