ArticleGeriatrics & gerontology international2026
Association Between CT-Based Rectal Stool Attenuation and Activities of Daily Living in Hospitalized Older Adults.
Article in Geriatrics & gerontology international, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
objectivesTo explore the association between rectal stool characteristics measured by computed tomography (CT), particularly stool attenuation, and activities of daily living (ADL) in hospitalized older adults who had previously undergone abdominal CT for clinical reasons.
methodsThis single-center exploratory cross-sectional study included adults aged ≥ 65 years admitted to the geriatric ward of Nagoya University Hospital who underwent abdominal CT within 1 month before or during hospitalization. Basic ADL (BADL) and instrumental ADL (IADL) were assessed using the Barthel Index and the Lawton and Brody IADL scale, respectively. Rectal stool attenuation, rectal lumen area, stool area, and gas area were measured on the axial slice with the largest rectal cross-section. High-attenuation stool was defined as > 100 HU, and 10 cm
resultsAmong 116 participants (mean age, 85.8 years), 31.0% had high-attenuation stool. High-attenuation stool was associated with significantly lower BADL scores (55.4 ± 38.0 vs. 74.4 ± 27.5) and IADL scores (2.4 ± 2.9 vs. 3.9 ± 2.8). Stool attenuation was positively correlated with stool area (r = 0.34) and negatively correlated with gas area (r = -0.31). In multivariable analysis, lower BADL (OR, 0.983; 95% CI, 0.970-0.997) and lower IADL (OR, 0.840; 95% CI, 0.715-0.986) were independently associated with high-attenuation stool. When analyzed as a continuous variable, stool attenuation was negatively correlated with both BADL (r = -0.224, p = 0.015) and IADL (r = -0.199, p = 0.032).
conclusionHigh rectal stool attenuation on CT was significantly associated with lower ADL in hospitalized older adults. These exploratory findings suggest that CT-based rectal stool attenuation may provide supplementary imaging information regarding functional vulnerability in older adults who have previously undergone abdominal CT. However, the cross-sectional design, CT-selected study population, and lack of contemporaneous assessment of constipation symptoms, bowel habits, or stool form preclude conclusions regarding causality or clinical utility.
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