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Table 1 Characteristics of the studied population according to the Geriatric Nutritional Risk Index (GNRI)

From: The geriatric nutrition risk index versus the mini-nutritional assessment short form in predicting postoperative delirium and hospital length of stay among older non-cardiac surgical patients: a prospective cohort study

CharacteristicTotalHigh Risk < 92 (n = 45)Low Risk 92–98 (n = 85)No Risk > 98 (n = 158)P-value a
Age (years), median (IQR)74 (72–78)75 (73–79)75 (72–78)74 (71–77)0.086
Male gender, n (%)148 (51.4)24 (53.3)36 (42.4)88(55.7)0.134
Preoperative pain, n (%)169 (58.7)26 (57.8)56 (65.9)87 (55.1)0.261
Depression, n (%)19 (6.6)4 (8.9)5 (5.9)10 (6.3)0.79
CCI, n (%)
 Mild (≤2)214 (74.3)34 (75.6)58 (68.2)122 (77.2) 
 Moderate (3, 4)52 (18.1)7 (15.6)21 (24.7)24 (15.2)0.546
 Severe (≥5)22 (7.6)4 (8.9)6 (7.1)12 (7.6) 
GNRI score, mean ± SD98.98 ± 8.4685.09 ± 5.45 b95.12 ± 2.17 b105.01 ± 4.49 b<0.001
MNA-SF score, med (IQR)12 (9–13)9 (7–11)10 (8–12)12 (11–14)<0.001
Barthel Index, median (IQR)100 (90–100)95 (72–100)100 (87–100)100 (95–100)0.010
Postoperative delirium, n (%)49 (17.0)14 (31.1)11 (12.9)24 (15.2)0.021
Length of stay, med (IQR)14 (21–10)17 (12–21)17 (12–23)13 (9–18)<0.001
  1. BMI body mass index, CCI Charlson Comorbidity Index, MNA-SF Mini Nutritional Assessment-Short Form.
  2. Notes: ap values according to ANOVA, Kruskall-Wallis or Chi-square tests;
  3. b Significantly different from the other groups by post-hoc comparison
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