Table 1

Clinical characteristics of previously seronegative patients who presented with arthritis and tested seropositive after COVID-19 infection

Patient 17Patient 28Patient 31Patient 41Patient 51Present patient
Age60 years67 years67 years49 years65 years56 years
SexFemaleMaleMaleMaleMaleFemale
SmokingNot mentionedNoNoNoYesNon-smoker
Hospitalisation during COVIDNot mentionedYesYesNot during acute phaseNoYes
Chest CT findingsGround glassingNot mentionedNot mentionedNot mentionedNot mentionedGround glassing
Time between COVID and arthritis25 days37 daysAlready present42 days3 days14 days
Joints affectedMetacarpophalangeal and interphalangeal jointsKnees and handsBoth extremitiesBoth extremitiesUpper extremitiesKnees and wrists
RF23 RU/mL411 IU/mLPositive- value not mentionedPositive- value not mentionedNegative131 IU/mL
Anti-CCP76 RU/mL19.2 U/mLPositive-value not mentionedPositive- value not mentionedPositive- value not mentioned35 U/mL
TreatmentMethotrexateMethotrexate, MethylprednisoloneNot mentionedNot mentionedNot mentionedMethotrexate, Intra-articular steroid injection
  • CCP, citrullinated cyclic peptide; RF, rheumatoid factor.