We would like to submit the following corrections to our recently published paper [].
Error in the Text
The sentence correction on Page 8 needs correction:
In the original sentence, it was:
The matched DCI group had a significantly lower SI level than the matched non–DCI group (10.91 ± 6.86 vs. 20.34 ± 8.01 μmol/L, p < 0.001) (Table 1 and Figure 2D).
The correct sentence should be:
The matched DCI group had a significantly lower SI level than the matched non–DCI group (9.00 ± 6.29 vs. 20.13 ± 8.45 μmol/L, p < 0.001) (Table 1 and Figure 2D).
Errors in Tables
In the original publication, there was one mistake in Table 1 and two mistakes in Table 3. In Table 1, the number of patients from admission to surgical treatment (≤72 h) in the Non-DCI group was 77 after PSM. In Table 3, the number of patients with WFNS grade (IV–V) was 68 in the poor outcome before PSM, and the number of patients from admission to surgical treatment (≤72 h) in the good outcome group was 66 after PSM. The corrected Table 1 and Table 3 appear below.
Table 1.
Univariate analysis of association with DCI before and after propensity-score matching.
Table 1.
Univariate analysis of association with DCI before and after propensity-score matching.
| Before Propensity-Score Matching | After Propensity-Score Matching | |||||
|---|---|---|---|---|---|---|
| Characteristics | Non-DCI | DCI | p Value | Non-DCI | DCI | p Value |
| (n = 625) | (n = 105) | (n = 104) | (n = 104) | |||
| Age, yrs, mean ± SD | 54.72 ± 11.47 | 55.65 ± 11.42 | 0.440 | 55.34 ± 11.22 | 55.76 ± 11.42 | 0.788 |
| Gender (n, %) | 0.513 | 1.00 | ||||
| Male | 235 (37.6) | 43 (41.0) | 43 (41.3) | 43 (41.3) | ||
| Female | 390 (62.4) | 62 (59.0) | 61 (58.7) | 61 (58.7) | ||
| Smoking (n, %) | 112 (17.9) | 16 (15.2) | 0.504 | 23 (22.1) | 16 (15.4) | 0.214 |
| Alcohol (n, %) | 62 (9.9) | 8 (7.6) | 0.459 | 9 (8.7) | 8 (7.7) | 0.800 |
| Medical history | ||||||
| Hypertension (n, %) | 307 (49.1) | 75 (71.4) | <0.001 | 81 (77.9) | 74 (71.2) | 0.218 |
| Diabetes (n, %) | 68 (10.9) | 13 (12.4) | 0.650 | 15 (14.4) | 13 (12.4) | 0.685 |
| Coronary heart disease (n, %) | 19 (3.0) | 2 (1.9) | 0.520 | 6 (5.8) | 2 (1.9) | 0.149 |
| Hyperlipidemia (n, %) | 119 (19.0) | 15 (14.3) | 0.244 | 25 (24.0) | 15 (14.4) | 0.079 |
| WFNS grade | <0.001 | 0.114 | ||||
| I–III | 535 (85.6) | 73 (69.5) | 82 (78.8) | 72 (69.2) | ||
| IV–V | 90 (14.4) | 32 (30.5) | 22 (21.2) | 32 (30.8) | ||
| Modified Fisher grade | <0.001 | 0.078 | ||||
| 1–2 | 482 (77.1) | 64 (61.0) | 75 (72.1) | 63 (60.6) | ||
| 3–4 | 143 (22.9) | 41 (39.0) | 29 (27.9) | 41 (39.4) | ||
| Aneurysm characteristics (n, %) | ||||||
| Multiple aneurysms | 115 (18.4) | 23 (21.9) | 0.396 | 17 (16.3) | 23 (22.1) | 0.291 |
| Single aneurysm location | 0.206 | 0.146 | ||||
| Anterior cerebral artery | 33 (6.5) | 2 (2.4) | 7 (18.0) | 2 (2.5) | ||
| Anterior communicating ar tery | 164 (32.2) | 30 (36.6) | 32 (36.8) | 29 (35.8) | ||
| Internal carotid artery | 76 (14.9) | 8 (9.8) | 15 (17.2) | 8 (9.9) | ||
| Middle cerebral artery | 104 (20.4) | 24 (29.3) | 14 (16.1) | 24 (29.6) | ||
| Posterior communicating artery | 109 (21.4) | 16 (19.5) | 15 (17.2) | 16 (19.8) | ||
| Others | 24 (4.7) | 2 (2.4) | 4 (4.6) | 2 (2.5) | ||
| Aneurysm size (n, %) | 0.405 | 0.487 | ||||
| <5 mm | 265 (42.4) | 41 (39.0) | 47 (45.2) | 41 (39.4) | ||
| 5–15 mm | 299 (47.8) | 53 (50.5) | 48 (46.2) | 52 (50.0) | ||
| 15–25 mm | 51 (8.2) | 7 (6.7) | 8 (7.7) | 7 (6.7) | ||
| >25 mm | 10 (1.6) | 4 (3.8) | 1 (1.0) | 4 (3.8) | ||
| Surgical methods (n, %) | 0.132 | 0.059 | ||||
| Clipping | 399 (63.8) | 75 (71.4) | 61 (58.7) | 74 (71.2) | ||
| Coiling | 226 (36.2) | 30 (28.6) | 43 (41.3) | 30 (28.8) | ||
| Time from admission to surgical treatment (n, %) | 0.018 | 0.874 | ||||
| ≤72 h | 396 (63.4) | 79 (75.2) | 77 (74.0) | 78 (75.0) | ||
| >72 h | 229 (36.6) | 26 (24.8) | 27 (26.0) | 26 (25.0) | ||
| Intracranial infection (n, %) | 45 (7.2) | 15 (14.3) | 0.014 | 18 (17.3) | 14 (13.5) | 0.442 |
| Hemoglobin, g/L, mean ± SD | 128.73 ± 17.97 | 130.13 ± 18.63 | 0.475 | 134.32 ± 17.14 | 129.88 ± 18.53 | 0.074 |
| Hematocrit, %, mean ± SD | 38.19 ± 4.86 | 38.56 ± 4.88 | 0.473 | 39.47 ± 4.74 | 38.49 ± 4.85 | 0.144 |
| Serum iron, umol/L, mean ± SD | 13.11 ± 6.52 | 8.99 ± 6.26 | <0.001 | 20.13 ± 8.45 | 9.00 ± 6.29 | <0.001 |
| modified Rankin Scale (n, %) | <0.001 | <0.001 | ||||
| 0–2 | 539 (86.2) | 58 (55.2) | 94 (90.4) | 57 (54.8) | ||
| 3–6 | 86 (13.8) | 47 (44.8) | 10 (9.6) | 47 (45.2) | ||
aSAH: aneurysmal subarachnoid hemorrhage; DCI: delayed cerebral ischemia mFisher: modified Fisher; SD: standard deviation; WFNS: World Federation of Neurosurgical Societies.
Table 3.
Univariate analysis of association with outcome in aSAH before and after propensity-score matching.
Table 3.
Univariate analysis of association with outcome in aSAH before and after propensity-score matching.
| Before Propensity-Score Matching | After Propensity-Score Matching | |||||
|---|---|---|---|---|---|---|
| Characteristics | Good Outcome | Poor Outcome | p Value | Good Outcome | Poor Outcome | p Value |
| (n = 597) | (n = 133) | (n = 93) | (n = 93) | |||
| Age, yrs, mean ± SD | 54.17 ± 11.30 | 57.89 ± 11.69 | 0.001 | 56.53 ± 11.54 | 56.75 ± 11.57 | 0.894 |
| Gender (n, %) | 0.898 | 1.00 | ||||
| Male | 228 (38.2) | 50 (37.6) | 34 (36.6) | 34 (36.6) | ||
| Female | 369 (61.8) | 83 (62.4) | 59 (63.4) | 59 (63.4) | ||
| Smoking (n, %) | 110 (18.4) | 18 (10.5) | 0.180 | 20 (21.5) | 13 (14.0) | 0.179 |
| Alcohol (n, %) | 60 (10.1) | 10 (7.5) | 0.356 | 10 (10.8) | 7 (7.5) | 0.445 |
| Medical history | ||||||
| Hypertension (n, %) | 293 (49.1) | 89 (66.9) | <0.001 | 66 (71.0) | 61 (65.6) | 0.431 |
| Diabetes (n, %) | 63 (10.6) | 18 (13.5) | 0.322 | 13 (14.0) | 11 (11.8) | 0.662 |
| Coronary heart disease (n, %) | 16 (2.7) | 5 (3.8) | 0.501 | 1 (1.1) | 2 (2.2) | 0.561 |
| Hyperlipidemia (n, %) | 105 (17.6) | 29 (21.8) | 0.256 | 20 (21.5) | 23 (34.7) | 0.602 |
| WFNS grade | <0.001 | 1.00 | ||||
| I–III | 543 (90.1) | 65 (48.9) | 60 (64.5) | 60 (64.5) | ||
| IV–V | 54 (9.1) | 68 (51.1) | 33 (35.5) | 33 (35.5) | ||
| Modified Fisher grade | <0.001 | 0.305 | ||||
| 1–2 | 487 (81.6) | 59 (44.4) | 44 (47.3) | 51 (54.8) | ||
| 3–4 | 110 (18.4) | 74 (55.6) | 49 (52.7) | 42 (45.2) | ||
| Aneurysm characteristics (n, %) | ||||||
| Multiple aneurysms | 108 (18.1) | 30 (22.6) | 0.234 | 16 (17.2) | 22 (23.7) | 0.275 |
| Single aneurysm location | 0.196 | 0.648 | ||||
| Anterior cerebral artery | 28 (5.3) | 7 (6.8) | 5 (6.5) | 4 (5.6) | ||
| Anterior communicating artery | 158 (32.3) | 36 (35.0) | 27 (35.1) | 25 (35.2) | ||
| Internal carotid artery | 63 (12.9) | 21 (20.4) | 8 (10.4) | 13 (18.3) | ||
| Middle cerebral artery | 107 (21.9) | 21 (20.4) | 16 (20.8) | 16 (22.5) | ||
| Posterior communicating artery | 109 (22.3) | 16 (15.5) | 18 (23.4) | 12 (16.9) | ||
| Others | 24 (4.9) | 2 (1.9) | 3 (3.9) | 1 (1.4) | ||
| Aneurysm size (n, %) | 0.570 | 0.594 | ||||
| <5 mm | 246 (41.2) | 60 (45.1) | 37 (39.8) | 44 (47.3) | ||
| 5–15 mm | 292 (48.9) | 60 (45.1) | 50 (53.8) | 41 (44.1) | ||
| 15–25 mm | 49 (8.2) | 9 (6.8) | 4 (4.3) | 6 (6.5) | ||
| >25 mm | 10 (1.7) | 4 (3.0) | 2 (2.2) | 4 (2.2) | ||
| Surgical methods (n, %) | 0.260 | 0.117 | ||||
| Clipping | 396 (63.3) | 78 (58.6) | 68 (73.1) | 58 (62.4) | ||
| Coiling | 201 (33.7) | 55 (41.4) | 25 (26.9) | 35 (37.6) | ||
| Time from admission to surgical treatment (n, %) | 0.370 | 0.633 | ||||
| ≤72 h | 384 (64.3) | 91 (68.4) | 66 (71.0) | 63 (67.7) | ||
| >72 h | 213 (35.7) | 42 (31.6) | 27 (29.0) | 30 (32.3) | ||
| Intracranial infection (n, %) | 48 (8.0) | 12 (9.0) | 0.709 | 8 (8.6) | 7 (7.5) | 0.788 |
| Hemoglobin, g/L, mean ± SD | 128.47 ± 17.69 | 131.02 ± 19.57 | 0.168 | 130.63 ± 16.48 | 130.71 ± 19.83 | 0.978 |
| Hematocrit, %, mean ± SD | 38.12 ± 4.81 | 38.79 ± 5.05 | 0.165 | 38.44 ± 4.43 | 38.74 ± 5.00 | 0.664 |
| Serum iron, umol/L, mean ± SD | 13.40 ± 6.80 | 8.59 ± 3.96 | <0.001 | 17.32 ± 9.90 | 9.38 ± 4.00 | <0.001 |
| DCI (n, %) | 58 (9.7) | 47 (35.3) | <0.001 | 23 (24.7) | 22 (23.7) | 0.864 |
aSAH: aneurysmal subarachnoid hemorrhage; DCI: delayed cerebral ischemia mFisher: modified Fisher; SD: standard deviation; WFNS: World Federation of Neurosurgical Societies.
The authors apologize for any inconvenience caused and state that the scientific conclusions are unaffected. This correction was approved by the Academic Editor. The original publication has also been updated.
Reference
- Zhang, Y.-B.; Zheng, F.; Stavrinou, L.; Wang, H.-J.; Fan, W.-J.; Yao, P.-S.; Lin, Y.-X.; Goldbrunner, R.; Zheng, S.-F.; Stavrinou, P.; et al. Admission Serum Iron as an Independent Risk Factor for Postoperative Delayed Cerebral Ischemia Following Aneurysmal Subarachnoid Hemorrhage: A Propensity-Matched Analysis. Brain Sci. 2022, 12, 1183. [Google Scholar] [CrossRef] [PubMed]
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. |
© 2022 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).