Table 1

COVID-19 and demographic characteristics of people with systemic autoimmune rheumatic diseases with confirmed COVID-19, overall and stratified by resolved or prolonged symptom duration by US Centers for Disease Control and Prevention definition of 28 days or longer (n=441)

Overall
N=441
Symptoms resolved in <28 days N=334Prolonged symptom duration 28 days or longer (active or resolved) N=107
Median COVID-19 symptom duration (or as of survey if ongoing), days (IQR)15 (7, 25)10 (7, 16)60 (30, 130)
COVID-19 symptom resolution
 Yes398 (90.2)334 (100.0)64 (59.8)
 No32 (7.3)0 (0.0)32 (29.9)
 Not sure11 (2.5)0 (0.0)11 (10.3)
Date of COVID-19 onset
 December 2019 to June 2020108 (24.5)79 (23.7)29 (27.1)
 July 2020 to December 2020208 (47.2)148 (44.3)60 (56.1)
 January 2021 to July 2021125 (28.3)107 (32.0)18 (16.8)
Acute COVID-19 severity
 Not hospitalised and no difficulties performing daily activities175 (39.7)157 (47.0)18 (16.8)
 Not hospitalised but had difficulties performing daily activities211 (47.8)146 (43.7)65 (60.7)
 Hospitalised46 (10.4)26 (7.8)20 (18.7)
 Hospitalised and required ICU care9 (2)5 (1.5)4 (3.7)
Age (years), mean (SD)48.2 (12.6)47.3 (12.7)50.8 (12.0)
Age categories, years
 18–2937 (8.4)30 (9.0)7 (6.5)
 30–49197 (44.7)159 (47.6)38 (35.5)
 50–69191 (43.3)134 (40.1)57 (53.3)
 70+16 (3.6)11 (3.3)5 (4.7)
Female sex369 (83.7)276 (82.6)93 (86.9)
Race/Ethnicity
 Asian (South, East Asian)11 (2.5)7 (2.1)4 (3.7)
 Black13 (2.9)8 (2.4)5 (4.7)
 Hispanic, Latinx or Latin American84 (19.0)72 (21.6)12 (11.2)
 Middle Eastern or North African11 (2.5)10 (3)1 (0.9)
 American Indian/Alaska Native/Aboriginal/Indigenous/First Nations1 (0.2)1 (0.3)0 (0.0)
 White268 (60.8)194 (58.1)74 (69.2)
 Other49 (11.1)38 (11.4)11 (10.3)
WHO region
 Americas277 (62.8)211 (63.2)66 (61.7)
 European140 (31.7)102 (30.5)38 (35.5)
 Eastern Mediterranean10 (2.3)8 (2.4)2 (1.9)
 South-East Asian8 (1.8)7 (2.1)1 (0.9)
 African1 (0.2)1 (0.3)0 (0)
 Western Pacific1 (0.2)1 (0.3)0 (0)
Education
 High school (secondary level/GED) or less70 (15.9)55 (16.5)15 (14)
 Some college103 (23.4)82 (24.6)21 (19.6)
 Bachelor degree (graduated college)110 (24.9)82 (24.6)28 (26.2)
 Graduate or professional degree154 (34.9)111 (33.2)43 (40.2)
  • N (%) are presented unless otherwise specified.

  • GED, general equivalency degree; ICU, intensive care unit;