Multicentre retrospective detection of nailfold videocapillaroscopy abnormalities in long covid patients.

Of note, after excluding six ANA-positive patients from the analysis, the statistical significance of the increase in capillary dilations (1.3±0.7 post-COVID-19 vs 0.6±0.7 pre-COVID-19, p<0.05) and the number of microhaemorrhages (1.2±0.8 post-COVID-19 vs 0.5±0.7 pre-COVID-19, p<0.05) after SARS-CoV-2 infection was confirmed, while the reduction in mean capillary number per linear millimetre (9.2±1.1 post-COVID-19 vs 9.6±0.6 pre-COVID-19, p=0.2), although present, did not reach statistical significance (low numbers).

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