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Table 1 Demographic and clinical characteristics of persons with new-onset anaemia according to anaemia types

From: Cancer risk in persons with new-onset anaemia: a population-based cohort study in Denmark

Patient characteristics AI
n (%)
CIIDA
n (%)
IDA
n (%)
Other
n (%)
Unclassified
n (%)
Total
n (%)
Total, n (%)a 2640 (5.4) 639 (1.3) 7674 (15.7) 4570 (9.3) 33,402 (68.3) 48,925 (100.0)
Age groups, years
 40–49 165 (6.3) 83 (13.0) 3386 (44.1) 555 (12.1) 4211 (12.6) 8400 (17.2)
 50–59 362 (13.7) 68 (10.6) 1355 (17.7) 825 (18.1) 4773 (14.3) 7383 (15.1)
 60–69 657 (24.9) 142 (22.2) 981 (12.8) 1037 (22.7) 7054 (21.1) 9871 (20.2)
 70–79 835 (31.6) 180 (28.2) 1127 (14.7) 1185 (25.9) 9424 (28.2) 12,751 (26.1)
 80–89 621 (23.5) 166 (26.0) 825 (10.8) 968 (21.2) 7940 (23.8) 10,520 (21.5)
Anaemia severity b
 Mild 1984 (75.2) 445 (69.6) 3244 (42.3) 3871 (84.7) 28,742 (86.0) 38,286 (78.3)
 Moderate 620 (23.5) 181 (28.3) 3883 (50.6) 658 (14.4) 4302 (12.9) 9644 (19.7)
 Severe 36 (1.4) 13 (2.0) 547 (7.1) 41 (0.9) 358 (1.1) 995 (2.0)
Civil status
 Living with a partner 1454 (55.1) 315 (49.3) 4372 (57.0) 2609 (57.1) 18,730 (56.1) 27,480 (56.2)
 Living alone 1186 (44.9) 324 (50.7) 3302 (43.0) 1961 (42.9) 14,672 (43.9) 21,445 (43.8)
Educational level
 Low 1203 (45.6) 333 (52.1) 2905 (37.9) 1893 (41.4) 14,798 (44.3) 21,132 (43.2)
 Medium 1003 (38.0) 215 (33.6) 2888 (37.6) 1787 (39.1) 12,773 (38.2) 18,666 (38.2)
 High 434 (16.4) 91 (14.2) 1881 (24.5) 890 (19.5) 5831 (17.5) 9127 (18.7)
Income
 Low 996 (37.7) 248 (38.8) 1988 (25.9) 1535 (33.6) 11,484 (34.4) 16,251 (33.2)
 Medium 859 (32.5) 217 (34.0) 2342 (30.5) 1424 (31.2) 11,274 (33.8) 16,116 (32.9)
 High 785 (29.7) 174 (27.2) 3344 (43.6) 1611 (35.3) 10,644 (31.9) 16,558 (33.8)
No. of comorbidities
 0 1516 (57.4) 309 (48.4) 5185 (67.6) 2484 (54.4) 16,909 (50.6) 26,403 (54.0)
 1 592 (22.4) 150 (23.5) 1379 (18.0) 1111 (24.3) 8238 (24.7) 11,470 (23.4)
 2 350 (13.3) 105 (16.4) 696 (9.1) 650 (14.2) 5246 (15.7) 7047 (14.4)
  ≥ 3 182 (6.9) 75 (11.7) 414 (5.4) 325 (7.1) 3009 (9.0) 4005 (8.2)
Sex
 Men 1612 (61.1) 259 (40.5) 1448 (18.9) 2885 (63.1) 20,944 (62.7) 27,148 (55.5)
 Women 1028 (38.9) 380 (59.5) 6226 (81.1) 1685 (36.9) 12,458 (37.3) 21,777 (44.5)
Type of comorbidity c
 Arthritis 38 (1.4) 6 (0.9) 52 (0.7) 47 (1.0) 343 (1.0) 486 (1.0)
 Cardiovascular disease 606 (23.0) 164 (25.7) 1177 (15.3) 1126 (24.6) 9100 (27.2) 12,173 (24.9)
 COPD 170 (6.4) 75 (11.7) 302 (3.9) 224 (4.9) 2072 (6.2) 2843 (5.8)
 Diabetes 190 (7.2) 73 (11.4) 575 (7.5) 397 (8.7) 3697 (11.1) 4932 (10.1)
 Hypertension 522 (19.8) 152 (23.8) 1086 (14.2) 979 (21.4) 7865 (23.5) 10,604 (21.7)
 IBD 17 (0.6) 12 (1.9) 72 (0.9) 47 (1.0) 334 (1.0) 482 (1.0)
 Liver disease 46 (1.7) 20 (3.1) 78 (1.0) 64 (1.4) 417 (1.2) 625 (1.3)
 Mental illness 190 (7.2) 69 (10.8) 606 (7.9) 368 (8.1) 3060 (9.2) 4293 (8.8)
 Neurological disorder 68 (2.6) 20 (3.1) 136 (1.8) 150 (3.3) 1082 (3.2) 1456 (3.0)
 Kidney disease 44 (1.7) 12 (1.9) 50 (0.7) 68 (1.5) 592 (1.8) 766 (1.6)
  1. Abbreviations: AI Anaemia of inflammation, CIIDA Combined inflammatory iron deficiency anaemia, COPD Chronic obstructive pulmonary disease, IBD Inflammatory bowel disease, IDA Iron deficiency anaemia, No Number, Unclassified The anaemia is not classifiable according to a guideline
  2. aTotal percentages are shown in row percentages, other variables are shown in column percentages
  3. bAnaemia severity was defined according to WHO’s guidelines: mild anaemia (haemoglobin > 110 g/L), moderate anaemia (haemoglobin 80–110 g/L), and severe anaemia (haemoglobin < 80 g/L)
  4. cComorbidity was registered for the ten years preceding the index date and categorized according to the chronic disease groups