When a critically ill patient receives a Gastrointestinal Dysfunction Score in the intensive care unit, the number on the chart may not mean the same thing from one bedside to the next. That is the central concern raised in a Matters Arising commentary published in Critical Care, responding to a large prospective multicentre evaluation of the GIDS in 2679 ICU patients. The original study, published on 30 September 2026, reported that higher GIDS values were associated with 28-day and 90-day mortality, and that the score also showed relationships with ICU-free days and the use of parenteral nutrition. The commentary’s authors, led by Qingdong Jia and including Caibao Hu, acknowledge this as an important contribution to efforts to incorporate gastrointestinal dysfunction into the assessment of multiple organ dysfunction syndrome, building on the earlier five-grade score development study. Yet their principal question is a deceptively simple one: what does an individual GIDS value actually mean at the bedside?
The answer, they argue, depends heavily on how the score was assembled. Two of the defined GIDS components, intra-abdominal pressure and gastric residual volume, were not measured uniformly across the study cohort. Intra-abdominal pressure was recorded in only 20.6 percent of patients, and gastric residual volume in 41.1 percent. On the first study day, neither measurement was available for the majority: intra-abdominal pressure was not measured in 86.6 percent of patients and gastric residual volume in 69.0 percent. When these components were not measured, they were treated as normal. The commentary describes this as a pragmatic approach that is understandable in routine ICU practice, but it also points out that the opportunity to obtain such measurements differed according to illness severity and admission type.
This pattern, the authors write, conceptually resembles an informative observation process, in which whether a variable is measured may itself carry information about the patient’s clinical state. The consequence is that the same numerical score can arise from different combinations of recorded clinical information. One patient may receive a given GIDS value largely from documented clinical signs, without any intra-abdominal pressure or gastric residual volume assessment at all. Another patient may receive an identical score only after abnormal measurements have been documented. Whether these two values carry the same bedside meaning, the commentary concludes, remains uncertain.
The original study’s authors did test the robustness of their mortality association. Sensitivity analyses showed that the association persisted when intra-abdominal pressure was removed, when both intra-abdominal pressure and gastric residual volume were removed, and when centres with and without intra-abdominal pressure measurement were compared. The commentary’s authors call these analyses important and note that they support the persistence of an outcome association. Their objection is more subtle: robustness to component removal does not establish that a given score denotes the same clinical state when the measurement context differs.
The distinction matters because several GIDS components are shaped by clinical management rather than physiology alone. Absent oral intake and prokinetic administration are both influenced by treatment decisions, while gastric residual volume contributes to the score only when clinicians choose to measure it. The original study’s authors themselves noted that the association between GIDS and parenteral nutrition may reflect clinical decision-making. Taken together, the commentary suggests, a high GIDS may partly reflect the intensity of gastrointestinal monitoring and treatment, in addition to underlying dysfunction.
The commentary also examines the limits of the fully measured version of the score. The measurement-complete analysis in the original study included only 311 patients for 28-day mortality and 309 patients for 90-day mortality, and component availability did not require same-day measurement. Within this smaller cohort, the 90-day mortality estimate was less precise and included the null, with a hazard ratio of 1.19 and a 95 percent confidence interval of 0.96 to 1.48. The commentary is careful about what this does and does not show. It does not negate the broader outcome associations reported in the full cohort, but it provides limited direct evidence about how the fully measured score performs.
Despite these reservations, the commentary stops short of dismissing the score. Clinically, it states, the findings support GIDS as a framework for structured gastrointestinal observation and as an outcome-associated descriptive score. What the evidence does not establish is whether GIDS-guided changes in enteral nutrition, prokinetic therapy, post-pyloric feeding, or parenteral nutrition improve outcomes. The commentary keeps association and intervention firmly separate: a score that tracks with mortality in observational data is not the same as a treatment target whose manipulation improves outcomes.
The authors outline what future validation should look like. Studies should report GIDS alongside the measurement context that generated it, evaluate pragmatic and fully measured implementations separately, and use prespecified, clinically justified approaches to intra-abdominal pressure and gastric residual volume ascertainment. They also call for research to assess whether changes in GIDS correspond to reproducible changes in gastrointestinal function, using an independent clinical or physiological reference.
Standardization may help. The commentary points to standardized outcome definitions and monitoring frameworks such as COSMOGI as tools that may improve comparability across studies, while established consensus procedures should guide intra-abdominal pressure measurement. For now, the authors offer a measured conclusion: in current practice, GIDS is best interpreted as a pragmatic, outcome-associated composite whose bedside meaning depends partly on which components were assessed.
Subject of Research: A commentary on the bedside interpretation of the Gastrointestinal Dysfunction Score in ICU patients
Article Title: What does a GIDS value mean at the bedside?
Article References: Jia, Q., Yuan, M., Chen, S., Faith, K., & Hu, C. (2026). What does a GIDS value mean at the bedside?. Critical Care, 30(1), Article 564. https://doi.org/10.1186/s13054-026-06399-7
Image Credits: AI Generated
DOI: 10.1186/s13054-026-06399-7
Keywords: GIDS, gastrointestinal dysfunction, ICU, intra-abdominal pressure, gastric residual volume, mortality, multiple organ dysfunction syndrome, parenteral nutrition, measurement context, COSMOGI, critical care, does
News Source: Ophelia Keating. (November 5, 2026). GIDS at the bedside: what the score hides when pressure and gastric volumes go unmeasured. Scienmag.
