P730 - ASSOCIATION BETWEEN THE GERIATRIC NUTRITIONAL RISK INDEX AND ERECTOR SPINAE MUSCLE MASS IN PATIENTS WITH ASPIRATION PNEUMONIA

P730

ASSOCIATION BETWEEN THE GERIATRIC NUTRITIONAL RISK INDEX AND ERECTOR SPINAE MUSCLE MASS IN PATIENTS WITH ASPIRATION PNEUMONIA

Y. Hiraoka^1,*, T. Ogasawara¹

¹Respiratory Medicine, Hamamatsu Medical Center, Hamamatsu, Japan

Rationale: Aspiration pneumonia has become a social concern in aging societies like Japan. The Geriatric Nutritional Risk Index (GNRI) and erector spinae muscle mass are recognized as important prognostic indicators in older adults and patients with sarcopenia or malignancy. This study aimed to clarify the relationship between GNRI and erector spinae muscle mass in patients with aspiration pneumonia and to assess their prognostic value.

Methods: This retrospective cohort study included 190 patients with aspiration pneumonia who were admitted to our hospital between November 2019 and November 2023. All patients followed a standardized clinical pathway for aspiration pneumonia. Clinical and nutritional data, including GNRI, were collected. The cross-sectional area of the erector spinae muscles (ESM_CSA) at the level of the 12th thoracic vertebra was measured on computed tomography and normalized by height squared (cm²/m²). Pearson correlation was used to evaluate the relationship between GNRI and normalized ESM_CSA. The Mann–Whitney U test was used to assess their association with the maintenance of oral intake.

Results: GNRI and normalized ESM_CSA showed a moderate positive correlation (r = 0.51, p < 0.001). Among the 190 patients (mean age: 87 years [range: 69–99]; 124 men and 66 women), 81 (43%) maintained oral intake at discharge (oral intake was discontinued in cases of death). GNRI was significantly higher in the oral intake group than in the non-oral intake group (83.0 [IQR, 75.4–89.5] vs. 76.0 [IQR, 68.0–81.5], p < 0.001), while normalized ESM_CSA tended to be higher in this group but not significantly (6.3 [IQR, 4.9–7.7] cm²/m² vs. 5.6 [IQR, 4.4–7.0] cm²/m², p = 0.10).

Conclusion: GNRI is positively correlated with erector spinae muscle mass in patients with aspiration pneumonia. Both measures may serve as useful prognostic indicators for the maintenance of oral intake.

Disclosure of Interest: None declared