Uniphasic Blanching of the Fingers, Abnormal Capillaroscopy in Nonsymptomatic Digits, and Autoantibodies: Expanding Options to Increase the Level of Suspicion of Connective Tissue Diseases beyond the Classification of Raynaud’s Phenomenon
Table 3
Univariate analysis of Raynaud’s phenomenon secondary to a suspected connective tissue disease versus systemic sclerosis (A) and association of different variables assessed by binomial logistic regression (B).
RP suspected secondary to a connective tissue disease versus systemic sclerosis
OR (95% CI)
value
(A) Univariate analysis
RP duration (years)
0.993 (0.984–1.002)
0.133
Number of fingers affected by RP
1.04 (0.843–1.284)
0.713
Thumb affected by RP
0.587 (0.192–1.795)
0.351
Number of RP colour phases
0.634 (0.279–1.438)
0.275
VAS pain
1.011 (0.99–1.033)
0.305
VAS severity
0.996 (0.975–1.018)
0.738
VAS discomfort
1.079 (0.889–1.309)
0.443
ANA positive (nonanticentromere) versus ANA negative
2.652 (0.61–11.518)
0.193
ANA positive (anticentromere) versus ANA negative
25 (4.248–147.122)
<0.001
(B) Binomial logistic regression
VAS pain
1.067 (1.015–1.122)
0.011
VAS severity
0.955 (0.912–0.999)
0.049
ANA positive (nonanticentromere) versus ANA negative
