Table 1.
Complications, length of in-hospital stay, and mortality rate according to presence of preoperative anaemia by age groups. Postoperative and hospital-acquired anaemia rates according to age groups
| Age (years) | 18–19 n = 12 485 |
20–29 n = 100 762 |
30–39 n = 136 847 |
40–49 n = 112 220 |
50–59 n = 171 687 |
60–69 n = 198 869 |
70–79 n = 238 172 |
80–89 n = 128 631 |
90–99 n = 18 028 |
100–109 n = 218 |
|---|---|---|---|---|---|---|---|---|---|---|
| Composite complication rate*‡ | 1.6 | 1.0 | 1.2 | 3.3 | 5.1 | 7.8 | 10.0 | 13.5 | 17.0 | 21.1 |
| (1.4–1.8) | (1.0–1.1) | (1.2–1.3) | (3.2–3.4) | (5.0–5.2) | (7.6–7.9) | (9.9–10.2) | (13.3–13.6) | (16.4–17.5) | (15.9–27.1) | |
| n = 201 | n = 1028 | n = 1664 | n = 3728 | n = 8738 | n =15 422 | n =23 896 | n =17 302 | n = 3060 | n = 46 | |
| With preoperative anaemia | 5.8 | 2.4 | 2.6 | 10.1 | 14.7 | 17.6 | 18.5 | 19.9 | 22.4 | 29.5 |
| (4.9–6.9) | (2.2–2.6) | (2.4–2.8) | (9.7–10.5) | (14.3–15.1) | (17.2–17.9) | (18.2–18.8) | (19.5–20.2) | (21.5–23.4) | (20.3–40.2) | |
| n = 123 of 2114 | n = 567 of 23 605 | n = 917 of 35 501 | n = 2023 of 20 043 | n = 4561 of 31 055 | n = 8225 of 46 818 | n =12 978 of 70 298 | n = 9569 of 48 195 | n = 1760 of 7846 | n = 26 of 88 | |
| Without preoperative anaemia | 0.9 | 0.6 | 0.8 | 2.1 | 3.3 | 5.4 | 7.6 | 11.6 | 15.8 | 18.5 |
| (0.7–1.1) | (0.6–0.7) | (0.7–0.9) | (2.0–2.2) | (3.2–3.4) | (5.3–5.5) | (7.4–7.7) | (11.4–11.9) | (15.0–16.7) | (10.8–28.7) | |
| n = 66 of 7349 | n = 370 of 57 801 | n = 642 of 79 253 | n = 1457 of 70 814 | n = 3608 of 108 682 | n = 6303 of 117 035 | n = 9560 of 126 279 | n = 6631 of 56 972 | n = 1086 of 6870 | n = 15 of 81 | |
| Length of hospital stay (days)† | 5.5 (±0.1) |
5.0 (±0.0) | 5.2 (±0.0) | 6.6 (±0.0) | 7.9 (±0.0) | 9.2 (±0.0) | 9.7 (±0.0) | 10.1 (±0.0) | 10.1 (±0.1) | 8.8 (±0.5) |
| With preoperative anaemia | 9.9 (±0.4) | 6.8 (±0.1) | 6.9 (±0.1) | 11.7 (±0.1) | 14.2 (±0.1) | 14.9 (±0.1) | 14.0 (±0.1) | 12.9 (±0.1) | 11.8 (±0.1) | 9.6 (±0.9 ) |
| Without preoperative anaemia | 5.1 (±0.1) | 4.8 (±0.0) | 4.9 (±0.0) | 6.1 (±0.0) | 7.2 (±0.0) | 8.2 (±0.0) | 9.0 (±0.0) | 9.9 (±0.0) | 10.5 (±0.1) | 9.7 (±0.8) |
| Mortality rate* | 0.3 | 0.2 | 0.3 | 0.8 | 1.4 | 2.1 | 2.7 | 3.9 | 6.3 | 8.7 |
| (0.2–0.5) | (0.2–0.3) | (0.2–0.3) | (0.8–0.9) | (1.3–1.5) | (2.0–2.1) | (2.6–2.8) | (3.7–4.0) | (6.0–6.7) | (5.3–13.3) | |
| n = 42 | n = 234 | n = 374 | n = 932 | n = 2408 | n = 4140 | n = 6402 | n = 4955 | n = 1140 | n = 19 | |
| With preoperative anaemia | 1.2 | 0.6 | 0.6 | 2.9 | 4.8 | 5.5 | 5.6 | 6.1 | 8.1 | 11.4 |
| (0.8–1.7) | (0.5–0.7) | (0.5–0.7) | (2.7–3.2) | (4.5–5.0) | (5.3–5.7) | (5.4–5.8) | (5.9–6.3) | (7.5–8.7) | (5.6–19.9) | |
| n = 25 of 2114 | n = 139 of 23 605 | n = 222 of 35 501 | n = 586 of 20 043 | n = 1476 of 31 055 | n = 2564 of 46 818 | n = 3945 of 70 298 | n = 2922 of 48 195 | n = 633 of 7846 | n = 10 of 88 | |
| Without preoperative anaemia | 0.1 | 0.1 | 0.1 | 0.4 | 0.7 | 1.1 | 1.6 | 2.9 | 6.0 | 7.4 |
| (0.1–0.3) | (0.1–0.1) | (0.1–0.2) | (0.3–0.4) | (0.6–0.7) | (1.0–1.2) | (1.5–1.7) | (2.7–3.0) | (5.4–6.6) | (2.8–15.4) | |
| n = 11 of 7349 | n = 65 of 57 801 | n = 110 of 79 253 | n = 268 of 70 814 | n = 750 of 108 682 | n = 1287 of 117 035 | n = 2037 of 126 279 | n = 1628 of 56 972 | n = 412 of 6870 | n = 6 of 81 | |
| With RBC transfusion | 9.0 | 8.0 | 8.3 | 12.4 | 13.3 | 13.3 | 13.6 | 14.8 | 14.2 | 24.4 |
| (6.5–12.1) | (6.9–9.2) | (7.4–9.3) | (11.5–13.2) | (12.7–13.9) | (12.8–13.7) | (13.2–14.0) | (14.3–15.3) | (13.0–15.4) | (12.9–39.5) | |
| n = 40 | n = 184 | n = 284 | n = 712 | n = 1734 | n = 2917 | n = 4267 | n = 2754 | n = 477 | n = 11 | |
| Without RBC transfusion | 0.0 | 0.1 | 0.1 | 0.2 | 0.4 | 0.7 | 1.0 | 2.0 | 4.5 | 4.6 |
| (0.0–0.1) | (0.0–0.1) | (0.1–0.1) | (0.2–0.2) | (0.4–0.5) | (0.7–0.7) | (1.0–1.1) | (1.9–2.1) | (4.2–4.9) | (2.0–8.9) | |
| n = 2 | n = 50 | n = 90 | n = 220 | n = 674 | n = 1223 | n = 2135 | n = 2201 | n = 663 | n = 8 | |
| Postoperative anaemia rate | 43.6 | 56.5 | 61.2 | 44.3 | 47.8 | 57.2 | 64.3 | 71.4 | 77.9 | 86.9 |
| (42.5–44.6) | (56.1–56.9) | (60.9–61.5) | (44.0–44.7) | (47.5–48.1) | (56.9–57.4) | (64.1–64.5) | (71.1–71.7) | (77.2–78.6) | (80.9–91.5) | |
| n = 3519 of 8080 | n = 41 144 of 72 827 | n = 64 768 of 105 810 | n = 35 415 of 79 857 | n = 58 899 of 123 179 | n = 84 918 of 148 561 | n = 116 547 of 181 252 | n = 69 910 of 97 926 | n = 11 166 of 14 335 | n = 152 of 175 | |
| Hospital-acquired anaemia rate | 26.6 | 39.1 | 45.1 | 29.2 | 33.6 | 41.1 | 46.1 | 49.9 | 56.3 | 75.0 |
| (25.4–27.8) | (38.7–39.6) | (44.7–45.5) | (28.8–29.5) | (33.3–33.9) | (40.8–41.4) | (45.8–46.4) | (49.4–50.3) | (55.1–57.6) | (63.4–84.5) | |
| n = 1392 of 5241 | n = 17 152 of 43 848 | n = 28 683 of 63 630 | n = 16 102 of 55 219 | n = 28 708 of 85 443 | n = 39 347 of 95 739 | n = 48 994 of 106 278 | n = 23 987 of 48 087 | n = 3397 of 6030 | n = 54 of 72 |
The denominator is only shown for the subgroup analysis, otherwise it is equal to n of each age subgroup displayed in the first line of the table. *Values are % (95% c.i.). †Values are mean(±s.e.m.). ‡At least one complication present. RBC, red blood cell.