{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,3]],"date-time":"2026-07-03T21:26:01Z","timestamp":1783113961477,"version":"3.54.6"},"reference-count":35,"publisher":"The Journal of Rheumatology","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Rheumatol"],"published-print":{"date-parts":[[2016,3]]},"abstract":"<jats:sec><jats:title>Objective.<\/jats:title><jats:p>To quantify earlier capillary diameter abnormalities, observed by nailfold videocapillaroscopy (NVC), in primary Raynaud phenomenon (PRP) subjects compared with RP subjects later evolved to systemic sclerosis (SSc)-associated secondary Raynaud phenomenon (SRP).<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods.<\/jats:title><jats:p>There were 6112 NVC images of 191 subjects analyzed at baseline and after a mean followup of 42.77 \u00b1 35.80 months. We selected 48 patients affected by SRP and 143 matched controls confirmed with PRP. The diameter of the most dilated limbs (arterial, venous, and apical) was measured in 16 images per subject. Statistical analysis was performed using nonparametric tests. The threshold values for capillary diameters associated with the development of SSc-associated SRP were determined through receiver-operating characteristic curves.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results.<\/jats:title><jats:p>Mean capillary diameter values were significantly different for arterial, venous, and average diameters (mean value of arterial, venous, and apical) between patients with PRP and SRP (p &lt; 0.0001). These alterations were found to be independent predictors for disease development (p = 0.015). Threshold values of 30<jats:italic>\u00b5<\/jats:italic>m (area under the curve = 0.802, sensitivity\/specificity = 0.85\/0.63) to 31<jats:italic>\u00b5<\/jats:italic>m were identified for average, arterial, and venous diameters, with a shortening effect on time to disease development.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion.<\/jats:title><jats:p>The study showed that capillary diameter is an independent predictor for development of SSc-associated SRP. Progression to SRP is unlikely for subjects affected by RP when average capillary diameter is under 30 \u03bcm. Subsequently, the execution of the qualitative\/quantitative integrated analysis should be part of the NVC followup of RP subjects.<\/jats:p><\/jats:sec>","DOI":"10.3899\/jrheum.150900","type":"journal-article","created":{"date-parts":[[2016,2,2]],"date-time":"2016-02-02T03:15:27Z","timestamp":1454382927000},"page":"599-606","source":"Crossref","is-referenced-by-count":54,"title":["Quantitative Alterations of Capillary Diameter Have a Predictive Value for Development of the Capillaroscopic Systemic Sclerosis Pattern"],"prefix":"10.3899","volume":"43","author":[{"given":"Amelia 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