Table II.

Risk factors for persistent or recurrent acral manifestations following chilblains

	OR	95% CI	p-value
Age, for 1 year	1.003	0.996–1.010	0.41
Sex, for women	1.3	1.06–1.59	0.01
History of chilblains	1.02	0.79–1.32	0.88
History of Raynaud syndrome	1.02	0.79–1.32	0.88
Seropositivity for SARS-CoV-2a	0.99	0.57–1.73	0.98
Duration of the initial flare of chilblains, for 1 day	1.003	0.999–1.007	0.20
Symptoms possibly related to COVID-19b	1.07	0.86–1.33	0.55
Localization of chilblains (ref=hands)			0.15
Feet	1.31	0.99–1.73
Feet and hands	1.15	0.78–1.69

^aSerological tests performed between May and August 2020.

^bAmong anosmia, ageusia, fever, asthenia, rhinitis, sore throat, cough, dyspnoea.

OR: odds ratio; 95% CI: 95% confidence interval.