Table 1

Participant demographics and comorbidities

CharacteristicTotal
n=503
Group 1*
n=99
Group 2†
n=106
Group 3‡
n=91
Group 4§
n=100
Group 5¶
n=107
Gender
 Male115 (22.9)24 (24.2)20 (18.9)26 (28.6)29 (29.0)16 (15.0)
 Female388 (77.1)75 (75.8)86 (81.1)65 (71.4)71 (71.0)91 (85.0)
Age
 Range (years)20–6520–6522–6421–6120–5621–62
 IQR29.5–47.031.0–49.030.0–46.028.8–48.028.0–42.030.0–47.0
 20–29125 (24.9)20 (20.2)25 (23.6)24 (26.4)32 (32.0)24 (22.4)
 30–39164 (32.6)27 (27.3)41 (38.7)29 (31.9)33 (33.0)34 (31.8)
 40–49122 (24.3)30 (30.3)24 (22.6)19 (20.9)23 (23.0)27 (25.2)
 50–5980 (15.9)16 (16.2)14 (13.2)17 (18.7)12 (12.0)21 (19.6)
 60–699 (1.8)6 (6.1)1 (0.9)1 (1.1)0 (0.0)1 (0.9)
Occupation
 Medical176 (35.0)18 (18.2)29 (27.4)38 (41.8)55 (55.0)36 (33.6)
 Nursing210 (41.7)43 (43.4)55 (51.9)32 (35.2)29 (29.0)51 (47.7)
 Healthcare assistant27 (5.4)11 (11.1)7 (6.6)3 (3.3)4 (4.0)2 (1.9)
 Physiotherapy15 (3.0)5 (5.1)1 (0.9)5 (5.5)3 (3.0)1 (0.9)
 Pharmacy17 (3.4)6 (6.1)6 (5.7)4 (3.8)1 (1.0)0 (0.0)
 Other allied health professional11 (2.2)3 (3.0)2 (1.9)3 (3.3)0 (0.0)3 (2.8)
 Administrative12 (2.4)4 (4.0)1 (0.9)1 (1.1)0 (0.0)6 (5.6)
 Auxiliary staff23 (4.6)9 (9.1)2 (1.9)3 (3.3)6 (6.0)3 (2.8)
 Other/not documented12 (2.2)0 (0.0)3 (2.8)2 (2.2)2 (2.0)5 (4.7)
Comorbidity
 Smoker29 (5.8)3 (3.0)13 (12.3)5 (5.5)5 (5.0)3 (2.8)
 Ex-smoker81 (16.1)32 (32.3)14 (13.2)11 (12.1)15 (15.0)9 (8.4)
 Hypertension30 (6.0)8 (8.1)5 (4.7)5 (5.5)5 (5.0)7 (6.5)
 COPD5 (1.0)1 (1.0)3 (2.8)0 (0.0)1 (1.0)0 (0.0)
 Asthma70 (13.9)14 (14.1)14 (13.2)8 (8.8)17 (17.0)17 (15.9)
 Diabetes mellitus10 (2.0)0 (0.0)4 (3.8)1 (1.1)2 (2.0)3 (2.8)
 Heart disease4 (0.8)0 (0.0)0 (0.0)2 (2.2)1 (1.0)1 (0.9)
 Other metabolic conditions22 (4.4)1 (1.0)8 (7.5)2 (2.2)6 (6.0)5 (4.7)
 Chronic kidney disease1 (0.2)0 (0.0)0 (0.0)0 (0.0)1 (1.0)0 (0.0)
 Chronic liver disease0 (0.0)0 (0.0)0 (0.0)0 (0.0)0 (0.0)0 (0.0)
 Immunosuppressed9 (1.8)0 (0.0)4 (3.8)0 (0.0)1 (1.0)4 (3.7)
 Blood disorder5 (1.0)0 (0.0)2 (1.9)0 (0.0)1 (1.0)2 (1.9)
 Active cancer diagnosis1 (0.2)0 (0.0)0 (0.0)0 (0.0)0 (0.0)1 (0.9)
 Neurological condition7 (1.4)1 (1.0)2 (1.9)2 (2.2)1 (1.0)1 (0.9)
 None of the above296 (58.8)52 (52.5)61 (57.5)62 (68.1)55 (55.0)66 (61.7)
Risk profile by area of work
 High risk187 (37.2)10 (10.1)43 (40.6)34 (37.4)100 (100)0 (0.0)
 Low risk316 (62.8)89 (89.9)63 (59.4)57 (62.6)0 (0.0)107 (100)
Institution
 Cork University Hospital469 (93.2)65 (65.7)106 (100)91 (100)100 (100)107 (100)
 Other institution34 (6.8)34 (34.3)0 (0.0)0 (0.0)0 (0.0)0 (0.0)
  • Data are presented as n (% of total displayed at top of individual columns) unless otherwise stated.

  • *RT-PCR-confirmed COVID-19 infection (>1-month postpositive RT-PCR).

  • †Close contacts of persons with COVID-19 infection and who subsequently developed symptoms (virus not detected by RT-PCR on oro/nasopharyngeal swab).

  • ‡Close contacts of COVID-19 cases and who remained asymptomatic.

  • §HCWs working in areas determined as high-risk clinical areas.

  • ¶HCWs working in areas determined as low-risk clinical areas.

  • COPD, chronic obstructive pulmonary disease; RT-PCR, real-time PCR.