The DOI matches its Crossref record; 2 of the 2 references it cites were found in a registry or an index.
Grading the amount of blood on computed tomograms after subarachnoid hemorrhage.
Abstract
According to several studies, the amount of subarachnoid blood on the initial computed tomogram of patients with aneurysmal subarachnoid hemorrhage has predictive value with respect to infarction and outcome. Of several methods for assessing the amount of subarachnoid blood, none has been subjected to a study of interobserver agreement. We describe our own method, applied in previous studies, in which the amounts of blood in 10 basal cisterns and fissures and in four ventricles are graded separately. In grading single computed tomograms of 182 consecutive patients with subarachnoid hemorrhage, the agreement between pairs of three observers, studied with kappa statistics, was relatively good for individual cisterns or fissures (kappa between 0.35 and 0.65) and ventricles (kappa between 0.47 and 0.74). The Spearman rank correlation coefficients for the sum of the scores for subarachnoid and intraventricular blood were very high. Summed scores for extravasated blood are suitable as a baseline variable in follow-up studies of patients with subarachnoid hemorrhage.
Overview
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Verification
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Citations
Cites
The Measurement of Observer Agreement for Categorical Data
Landis, J. R., & Koch, G. G. (1977) · Biometrics · doi:10.2307/2529310 · Cited by 81,148
Statistical Methods for Rates and Proportions
Fleiss, J. L., Levin, B., & Paik, M. C. (2003) · Wiley Series in Probability and Statistics · doi:10.1002/0471445428 · Cited by 18,646
Cited by
Subarachnoid haemorrhage: diagnosis, causes and management
van Gijn, J., & Rinkel, G. J. E. (2001) · Brain · doi:10.1093/brain/124.2.249 · Cited by 1,353
Self-citationSpontaneous subarachnoid haemorrhage
Macdonald, R. L., & Schweizer, T. A. (2017) · The Lancet · doi:10.1016/s0140-6736(16)30668-7 · Cited by 1,149
Macdonald, R. L., Kassell, N. F., Mayer, S., Ruefenacht, D., Schmiedek, P., Weidauer, S., Frey, A., Roux, S., & Pasqualin, A. (2008) · Stroke · doi:10.1161/strokeaha.108.519942 · Cited by 648
Spontaneous subarachnoid haemorrhage
Claassen, J., & Park, S. (2022) · The Lancet · doi:10.1016/s0140-6736(22)00938-2 · Cited by 587
Subarachnoid Hemorrhage Grading Scales: A Systematic Review
Rosen, D. S., & Macdonald, R. L. (2005) · Neurocritical Care · doi:10.1385/ncc:2:2:110 · Cited by 351
Metadata
- Authors
- Hijdra, A., Brouwers, P. J., Vermeulen, M., & van Gijn, J.
- Venue
- Stroke
- Published
- 1990-08
- Volume
- 21
- Issue
- 8
- Pages
- 1156-1161
- ISSN
- 0039-2499 (ISSN-L)
- 1524-4628
- OpenAlex
- W2051837238
- Cited by
- 429
- References
- 2
- FWCI
- 2.19
- Type
- journal article
- Language
- en
- Open access
- closed
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review
How to cite
Cite CoChat for the checks on this page, and the paper for its own findings.
- This page
- CoChat. (2026). Citation check: Grading the amount of blood on computed tomograms after subarachnoid hemorrhage. https://app.cochat.ai/papers/10.1161/01.str.21.8.1156
- The paper
- Hijdra, A., Brouwers, P. J., Vermeulen, M., & van Gijn, J. (1990). Grading the amount of blood on computed tomograms after subarachnoid hemorrhage. Stroke. https://doi.org/10.1161/01.str.21.8.1156
Data sources
Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
