Practical Geriatrics ›› 2024, Vol. 38 ›› Issue (8): 831-836.doi: 10.3969/j.issn.1003-9198.2024.08.017

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Prediction value of GNRI and CONUT score for≥grade 2 radiation pneumonia after radiotherapy in elderly patients with locally advanced non-small cell lung cancer

HUANG Rui   

  1. Department of Radiotherapy, Fuyang People’ Hospital, Fuyang 236000, China
  • Received:2023-10-23 Online:2024-08-20 Published:2024-08-26

Abstract: Objective To analyze the predictive value of geriatric nutritional risk index (GNRI) and controlling nutritional status (CONUT) score for ≥grade 2 radiation pneumonia (RP) after radiotherapy in the elderly patients with locally advanced non-small cell lung cancer (NSCLC). Methods A total of 81 elderly patients with stage Ⅲ NSCLC aged ≥65 years who received radiotherapy in our hospital from January 2019 to January 2022 were enrolled in this study, and they were followed up for 3 months after radiotherapy. According to the occurrence of RP, the patients were divided into ≥grade 2 RP group (group A,25 cases) and <grade 2 group (group B,56 cases). The clinical data and radiotherapy dosimetry parameters of the patients were collected. GNRI and CONUT scores at the end of radiotherapy were evaluated and compared between the two groups. Multivariate Logistic regression analysis was used to explore the influencing factors of ≥grade 2 RP after radiotherapy, and receiver operating characteristic(ROC)curve was used to analyze the predictive value of GNRI and CONUT scores for ≥grade 2 RP after radiotherapy in the elderly patients with locally advanced NSCLC. Results The dosimetry comparison between the two groups showed that V20 (percentage of lung volume receiving radiation dose >20 Gy in both lungs) in group A was higher than that in group B (P < 0.05). At the end of radiotherapy, GNRI was lower while the CONUT score was higher in group A than that in group B (P < 0.05) . Multivariate Logistic regression showed that low GNRI and high CONUT score at the end of radiotherapy were independent risk factors for ≥grade 2 RP after radiotherapy in the elderly patients with locally advanced NSCLC. ROC curve analysis showed that the cut-off value of GNRI and CONUT score in predicting ≥grade 2 RP after radiotherapy was 94.22 and 4.5, with an area under the curve(AUC) of 0.785 and 0.894 respectively. The AUC of the combination of GNRI and CONUT score in predicting ≥grade 2 RP after radiotherapy was 0.925, and the sensitivity was 0.840, and the specificity was 0.929. Conclusions Low GNRI and high CONUT score at the end of radiotherapy are independent risk factors for ≥grade 2 RP after radiotherapy in the elderly patients with locally advanced NSCLC, and combination of GNRI and CONUT score have high predictive value.

Key words: locally advanced non-small cell lung cancer, aged, radiation pneumonia, geriatric nutrition risk index, controlling nutritional status score

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