Skip to main content
. 2023 Apr 7;29:100630. doi: 10.1016/j.lanepe.2023.100630

Table 2.

Baseline characteristics of patients included in the study by migration background (imputed data).

Categories Total
N = 1886
Dutch origin
N = 776
African Surinamese origin
N = 177
South Asian Surinamese origin
N = 72
Moroccan origin
N = 144
Turkish origin
N = 67
Other origins
N = 310
Unknown origin
N = 340
p-value for differences between ethnic groups
Demographics measures
 Age (years), median (IQR) 62 (59–71) 66 (56–75) 59 (50–67) 58.5 (50–68) 60 (48–67) 58 (51–68) 57 (47–66) 62 (51–71) <0.001
 Sex, n (%)
 Male 1067 (56.57) 447 (57.60) 69 (38.98) 39 (54.17) 84 (58.33) 37 (55.22) 187 (60.32) 204 (60.00) <0.001
 Female 819 (43.23) 329 (42.40) 108 (61.02) 33 (45.83) 60 (41.67) 30 (44.78) 123 (39.38) 136 (40.00)
Behavioural measures
 Smoking, n (%)
 Current smokers 181 (9.59) 80 (10.31) 20 (11.30) 8 (11.11) 7 (4.86) 5 (7.46) 26 (8.39) 35 (10.29) <0.001
 Former smokers 621 (23.93) 311 (40.08) 58 (32.77) 21 (29.17) 31 (21.53) 28 (41.79) 73 (23.55) 99 (29.12)
 Never smoked 1084 (57.47) 385 (49.61) 99 (55.93) 43 (59.72) 106 (73.61) 34 (50.75) 211 (68.06) 206 (60.59)
 Alcohol use disorder, n (%)
 Yes 87 (4.61) 47 (6.06) 9 (5.08) 3 (4.17) 5 (3.47) 4 (5.97) 7 (2.26) 12 (3.53) 0.089
 No 1799 (95.39) 729 (93.94) 168 (94,91) 69 (95.83) 139 (96.52) 63 (94.03) 303 (97.74) 328 (96.47)
 Vaccinated against COVID-19
 Yes 169 (8.96) 86 (11.08) 9 (5.08) 6 (8.33) 11 (7.64) 4 (5.97) 22 (7.10) 31 (9.12) 0.127
 No 1717 (91.04) 690 (88.92) 168 (94.92) 66 (91.67) 133 (92.36) 63 (94.03) 288 (92.90) 309 (90.88)
Underlying medical conditions
 Obesity, n (%)
 Yes 530 (28.11) 213 (27.45) 72 (40.67) 17 (23.61) 44 (30.55) 20 (29.85) 85 (27.41) 79 (23.23) 0.003
 No 1356 (71.89) 563 (72.55) 105 (59.32) 55 (76.39) 100 (69.44) 47 (70.15) 225 (72.58) 261 (76.76)
 Hypertension, n (%)
 Yes 656 (34.78) 245 (31.57) 94 (53.11) 37 (51.39) 38 (26.39) 30 (44.78) 119 (38.39) 93 (27.35) <0.001
 No 1230 (65.22) 531 (68.43) 83 (46.89) 35 (48.61) 106 (73.61) 37 (55.22) 191 (61.61) 247 (72.65)
 Chronic respiratory condition, n (%)
 Yes 312 (16.54) 146 (18.81) 36 (20.34) 12 (16.67) 15 (10.42) 12 (17.91) 38 (12.26) 53 (15.59) 0.041
 No 1574 (83.46) 630 (81.19) 141 (79.66) 60 (83.33) 129 (89.58) 55 (82.09) 272 (87.74) 287 (84.41)
 Chronic cardiovascular condition, n (%)
 Yes 373 (19.78) 183 (23.58) 27 (15.25) 26 (36.11) 35 (24.31) 12 (17.91) 44 (14.19) 46 (13.53) <0.001
 No 1513 (80.22) 593 (76.42) 150 (84.75) 46 (63.89) 109 (75.69) 55 (82.09) 266 (85.81) 294 (86.47)
 Diabetes mellitus, n (%)
 Yes 442 (23.44) 132 (17.01) 56 (31.64) 31 (43.06) 43 (29.86) 20 (29.85) 82 (26.45) 78 (22.94) <0.001
 No 1444 (76.56) 644 (82.99) 121 (68.36) 41 (56.94) 101 (70.14) 47 (70.15) 228 (73.55) 262 (77.06)
 Chronic kidney disease, n (%)
 Yes 186 (9.86) 61 (7.86) 23 (12.99) 22 (30.56) 12 (8.33) 10 (14.93) 37 (11.94) 21 (6.18) <0.001
 No 1700 (90.14) 715 (92.14) 154 (87.01) 50 (69.44) 132 (91.67) 57 (85.07) 273 (88.06) 319 (93.82)
 Receiving immunosuppressive medication, n (%)
 Yes 159 (8.43) 77 (9.92) 17 (9.60) 7 (9.72) 9 (6.25) 6 (8.96) 26 (8.39) 17 (5.00) 0.185
 No 1727 (91.57) 699 (90.08) 160 (90.40) 65 (90.28) 135 (93.75) 61 (91.04) 284 (91.61) 323 (95.00)
 Chronic liver disease, n (%)
 Yes 66 (3.50) 22 (2.84) 6 (3.39) 9 (12.50) 2 (1.39) 2 (2.99) 14 (4.52) 11 (3.24) 0.002
 No 1820 (96.50) 754 (97.16) 171 (96.61) 63 (87.50) 142 (98.61) 65 (97.01) 296 (95.48) 329 (96.76)
 Malignancy, n (%)
 Yes 100 (5.30) 58 (7.47) 10 (5.65) 2 (2.78) 4 (2.78) 2 (2.99) 8 (2.58) 16 (4.71) 0.016
 No 1786 (94.70) 718 (92.53) 167 (94.35) 70 (97.22) 140 (97.22) 65 (97.01) 302 (97.42) 324 (95.29)
 Chronic haematological condition, n (%)
 Yes 82 (4.35) 34 (4.38) 18 (10.17) 1 (1.39) 3 (2.08) 3 (4.48) 12 (3.87) 11 (3.24) 0.004
 No 1804 (95.65) 742 (95.62) 159 (89.83) 71 (98.61) 141 (97.92) 64 (95.52) 298 (96.13) 329 (96.76)
 Chronic neurological condition, n (%)
 Yes 190 (10.07) 88 (11.34) 18 (10.17) 9 (12.50) 10 (6.94) 4 (5.97) 32 (10.32) 29 (8.53) 0.474
 No 1696 (89.93) 688 (88.66) 159 (89.83) 63 (87.50) 134 (93.06) 63 (94.03) 278 (89.68) 311 (91.47)
 Number of chronic conditions, n (%)
 None 560 (29.69) 219 (28.22) 27 (15.25) 14 (19.44) 53 (36.81) 12 (17.91) 106 (34.19) 129 (37.94) <0.001
 1 chronic condition 467 (24.76) 197 (25.39) 46 (25.98) 15 (20.83) 36 (25.00) 23 (34.33) 72 (23.22) 78 (22.94)
 2 chronic conditions 367 (19.45) 166 (21.39) 37 (20.90) 11 (15.27) 21 (14.58) 11 (16.41) 53 (17.09) 68 (20.00)
 3 chronic conditions 246 (13.04) 105 (13.53) 28 (15.81) 13 (18.05) 16 (11.11) 13 (19.40) 34 (10.96) 37 (10.88)
 4+ chronic conditions 246 (13.04) 89 (11.46) 39 (22.03) 19 (26.39) 18 (12.50) 8 (11.94) 45 (14.51) 28 (8.23)
Hospital admission parameters
 Number of days admitted in hospital, median (IQR) 6.00 (3.00–11.00) 7.00 (4.00–14.00) 4.00 (3.00–9.00) 5.00 (3.00–10.00) 5.00 (3.00–9.25) 7.00 (3.00–10.00) 6.00 (3.50–11.00) 5.00 (3.00–10.00) <0.001
 Rehospitalization, n (%)
 Yes 190 (10.07) 27 (3.48) 5 (2.82) 3 (4.17) 7 (4.86) 4 (5.97) 16 (5.16) 18 (5.29) 0.651
 No 1696 (89.93) 749 (96.52) 172 (97.18) 69 (95.83) 137 (95.14) 63 (94.03) 294 (94.84) 322 (94.71)
 Admitted to the ICU, n (%)
 Yes 385 (20.41) 180 (23.20) 24 (13.56) 11 (15.28) 26 (18.06) 17 (25.37) 67 (21.61) 60 (17.65) 0.038
 No 1501 (79.59) 596 (76.80) 153 (86.44) 61 (84.72) 118 (81.94) 50 (74.63) 243 (78.39) 280 (82.35)
 Received oxygen, n (%)
 Yes 1608 (85.26) 659 (84.92) 150 (84.75) 56 (77.78) 130 (90.28) 60 (89.55) 263 (84.84) 290 (85.29) 0.022
 No 278 (22.32) 117 (15.08) 27 (15.25) 16 (22.22) 14 (9.72) 7 (10.45) 47 (15.16) 50 (14.71)
 Received antibiotics, n (%)
 Yes 861(45.65) 380 (48.97) 72 (40.68) 28 (38.89) 55 (38.19) 35 (52.24) 170 (54.84) 121 (35.59) <0.001
 No 1025 (54.75) 396 (51.03) 105 (59.32) 44 (61.11) 89 (61.81) 32 (47.76) 140 (45.16) 219 (64.41)
 Received corticosteroids, n (%)
 Yes 1091 (57.85) 416 (53.61) 108 (61.02) 44 (61.11) 77 (53.47) 41 (61.19) 182 (58.71) 223 (65.59) 0.011
 No 795 (42.15) 360 (46.39) 69 (38.98) 28 (38.89) 67 (46.53) 26 (38.81) 128 (41.29) 117 (34.41)
 Received remdesivir, n (%)
 Yes 181 (9.60) 50 (6.44) 30 (16.95) 7 (9.72) 18 (12.50) 17 (25.37) 34 (10.97) 25 (7.35) <0.001
 No 1705 (90.40) 726 (93.56) 147 (83.05) 65 (90.28) 126 (87.50) 50 (74.63) 276 (89.03) 315 (92.65)
Presence of long COVID symptoms
 Fatigue, n (%)
 Yes 340 (18.03) 127 (16.37) 39 (22.03) 15 (20.83) 29 (20.14) 12 (17.91) 52 (16.77) 66 (19.41) 0.549
 No 1546 (81.97) 649 (83.63) 138 (77.97) 57 (79.17) 115 (79.86) 55 (82.09) 258 (83.23) 274 (80.59)
 Dyspnoea, n (%)
 Yes 308 (16.33) 112 (14.43) 32 (18.08) 14 (19.44) 22 (15.28) 16 (23.88) 45 (14.52) 67 (19.71) 0.150
 No 1578 (83.67) 664 (85.57) 145 (81.92) 58 (80.56) 122 (84.72) 51 (76.12) 265 (85.48) 273 (80.29)
 Cough, n (%)
 Yes 73 (3.87) 26 (3.35) 8 (4.52) 5 (6.94) 7 (4.86) 6 (8.96) 11 (3.55) 10 (2.94) 0.203
 No 1813 (96.13) 750 (96.65) 169 (95.48) 67 (93.06) 137 (95.14) 61 (91.04) 299 (96.45) 330 (97.06)
 Chest pain, n (%)
 Yes 43 (2.28) 17 (2.19) 6 (3.39) 1 (1.39) 7 (4.86) 1 (1.49) 6 (1.94) 5 (1.47) 0.328
 No 1843 (97.72) 759 (97.81) 171 (96.61) 71 (98.61) 137 (95.14) 66 (98.51) 304 (98.06) 335 (98.53)
 Heart palpitations, n (%)
 Yes 14 (0.74) 3 (0.39) 1 (0.56) 0 (0.00) 6 (4.17) 0 (0.00) 3 (0.97) 1 (0.29) <0.001
 No 1872 (99.26) 773 (99.61) 176 (99.44) 72 (100.00) 138 (95.83) 67 (100.00) 307 (99.03) 339 (99.71)
 Dizziness, n (%)
 Yes 15 (0.80) 2 (0.26) 2 (1.13) 0 (0.00) 1 (0.69) 3 (4.48) 5 (1.61) 2 (0.59) 0.006
 No 1871 (99.20) 774 (99.74) 175 (98.87) 72 (100.00) 143 (99.31) 64 (95.52) 305 (98.39) 338 (99.41)
 Joint/muscle pain, n (%)
 Yes 43 (2.28) 7 (0.90) 6 (3.39) 4 (5.56) 4 (2.78) 6 (8.96) 14 (4.52) 2 (0.59) <0.001
 No 1843 (97.72) 769 (99.10) 171 (96.61) 68 (94.44) 140 (97.22) 61 (91.04) 296 (95.48) 338 (99.41)
 Loss of taste/smell, n (%)
 Yes 32 (1.70) 14 (1.80) 3 (1.69) 0 (0.00) 3 (2.08) 1 (1.49) 7 (2.26) 4 (1.18) 0.859
 No 1854 (98.30) 762 (98.20) 174 (98.31) 72 (100.00) 141 (97.92) 66 (98.51) 303 (97.74) 336 (98.82)
 Insomnia, n (%)
 Yes 77 (4.08) 24 (3.09) 10 (5.65) 4 (5.56) 10 (6.94) 4 (5.97) 19 (6.13) 6 (1.76) 0.020
 No 1809 (95.92) 752 (96.91) 167 (94.35) 68 (94.44) 134 (93.06) 63 (94.03) 291 (93.87) 334 (98.24)
 Headache, n (%)
 Yes 14 (0.74) 5 (0.64) 1 (0.56) 2 (2.78) 0 (0.00) 0 (0.00) 6 (1.94) 0 (0.00) 0.026
 No 1872 (99.26) 771 (99.36) 176 (99.44) 70 (97.22) 144 (100.00) 67 (100.00) 304 (98.06) 340 (100.00)
 Any long COVID symptom, n (%)
 Yes 483 (25.61) 174 (22.42) 59 (33.33) 24 (33.33) 44 (30.56) 24 (35.82) 79 (25.48) 79 (23.24) 0.005
 No 1403 (74.39) 602 (77.58) 118 (66.67) 48 (66.67) 100 (69.44) 43 (64.18) 231 (74.52) 261 (76.76)

p-value for differences between ethnic groups considered statistically significant at values less than 0.05.

Alcohol use disorder based on Diagnostic and Statistical Manual of Mental Disorders (DSM–5) criteria.

Vaccinated against COVID-19 refers to receipt of any time of COVID-19 before admission irrespective of number of doses at admission.

Obesity: body mass index ≥30 kg/m2, data collected as a yes or no in the electronic medical records.

Chronic respiratory condition: Asthma, Alpha 1 trypsin deficiency, Asbestosis, Cryptogenic organizing pneumonia (COP), LAM, LICS, Broncho-pulmonary dysplasia or Primary ciliary dyskinesia, Bronchiectasis, Cystic fibrosis, COPD (chronic bronchitis, emphysema), Lung fibrosis, Sarcoidosis, Obstructive sleep apnoea, Pulmonary hypertension.

Chronic cardiovascular condition: Myocardial infarction, Cardiac arrhythmias: AVNRT, Atrial fibrillation, (supra)ventricular tachycardia, Ventricular tachycardia, Brugada syndrome, Sick sinus syndrome, Wolf Parkinson white syndrome, Heart failure, Cardiomyopathy, valvular heart diseases: aortic stenosis, aortic regurgitation, mitral regurgitation, Tricuspid regurgitation, all other forms of valvular diseases.

Chronic kidney disease: Acute tubular necrosis or tubulo interstitial nephritis (TIN), Atypical haemolytic uremic syndrome (aHUS), Amyloidosis, Anti-GBM nephritis, Bartter syndrome, Kidney damage due to medication, Chronic bladder infections/kidney infections, Cryoglobulinemia, Cysts, Cystinosis, Dense deposit disease (DDD), Focal segmental glomerulosclerosis (FSGS), Gitelman syndrome, HNF1 beta associated kidney disease, Horseshoe kidneys, IgA nephropathy, Medullary Sponge Kidneys, Membranous nephropathy, Minimal change disease, mononier Nail-patella syndrome (NPS), Nephrogenic diabetes insipidus, Nephronophthisis, Nephrosclerosis, Nephrotic syndrome, Renal angiomyolipoma's, Kidney filter, Primary hyperoxaluria, Reflux nephropathy, Shrivel kidneys scleroderma, SLE nephritis, Alport's syndrome, Systemic Vasculitis.

Receiving Immunosuppressive medication: Azathioprine, Lenalidomide, Methotrexate, Pirfenidone, Epomalidomide, Thalidomide, Abatacept, Apremilast, Baricitinib, Belatacept, Belimumab, Eculizumab, Vedolizumab, Everolimus, Leflunomide, Mycophenolic acid, Sirolimus, Thymocyte globulin, Tofacitinib, Upadacinitib.

Diabetes mellitus includes its complications such as diabetic foot, diabetic polyneuropathy, diabetic retinopathy, diabetic nephropathy.

Chronic haematological condition: Chronic lymphoblastic leukaemia/Acute leukaemia, Thalassemia, Sickle Cell Disease, Haemolytic Disorders, Clotting disorders (Haemophilia, von Willebrand disease, Thrombophilia).

Chronic neurological condition: Amyotrophic lateral sclerosis (ALS), Muscular dystrophies (Duchenne, Becker muscular dystrophy), Multiple sclerosis, Parkinson's disease, Guillain barre with still phenomena, Cerebral vascular accidents, (bloody/non-blooded)/transient ischemic attack, Pompeii disease, Dementia.

Chronic liver disease: Cirrhosis, Portal hypertension, Chronic hepatitis.

Received corticosteroids: Hydrocortisone, Prednisone, Dexamethasone, Methylprednisolone.

Received antibiotic medications applies to all forms of antibiotics.