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Table 2 Logistic regression analysis of independent variables according to 30-day readmission status (n=266)

From: Malnutrition and depression as predictors for 30-day unplanned readmission in older patient: a prospective cohort study to develop 7-point scoring system

Variable Readmission status RR (95% CI) p value
No, n (%) Yes, n (%)
Age
 ≤ 70 years 113 (62.1) 69 (37.9)   
 > 70 years 53 (63.1) 56 (40.9) 0.987 (0.834–1.167) 0.875
Sex
 Male 85 (65.9) 44 (34.1)   
 Female 81 (59.1) 56 (40.9) 1.114 (0.925-1.343) 0.255
Length of stay (days)
 1-14 126 (67.3) 71 (36)   
 >14 40 (58) 29 (42) 1.069 (0.919–1.244) 0.377
Frailty status
 Fit or prefail 105 (67.3) 51 (32.7)   
 Frail 61 (55.5) 49 (44.5) 1.214 (0.994–1.483) 0.049*
Functional status (Barthel Index of ADL)
 Independent 76 (73.1) 28 (26.9)   
 Dependent 90 (55.6) 72 (44.4) 1.315(1.098–1.576) 0.004*
Nutritional status (MNA-SF)
 Normal 74 (78.7) 20 (21.3)   
 At risk for malnutrition or malnutrition 92 (53.5) 80 (46.5) 1.472 (1.236–1.752) <0.001*
Cognitive status (AMT)
 Normal 129 (64) 67 (34.2)   
 Cognitive problem 37 (52.9) 33 (47.1) 1.245 (0.976–1.588) 0.055*
Depression status
 Normal 124 (70.1) 53 (29.9)   
 Strong probability or depression 42 (47.2) 47 (52.8) 1.485 (1.168–1.887) <0.001*
Charlson Comorbidity Index
 <5 (not severe) 42 (59.2) 29 (40.8)   
 >5 (severe) 124 (63.6) 71 (36.4) 0.930 (0.746–1.160) 0.509
Polypharmacy
 No 64 (61) 41 (39)   
 Yes 102 (63.4) 59 (36.6) 0.962 (0.793–1.167) 0.693
Caregiver burden
 No burden 29 (56.9) 22 (43.1)   
 With burden 137 (63.7) 78 (36.3) 1.189 (0.828–1.707) 0.363
Severity of disease
 Mild to moderate 93 (63.3) 54 (36.7)   
 Severe 73 (61.3) 46 (38.7) 1.031(0.854–1.245) 0.748
Malignancy
 No 137 (66.8) 68 (33.2)   
 Yes 29 (47.5) 32 (52.5) 1.406 (1.062–1.861) 0.006*
Previous admission (in the past 6 months)
 No 103 (69.1) 46 (30.9)   
 Yes 63 (52.9) 56 (47.1) 1.284 (1.052–1.567) 0.011*
  1. RR relative risk, CI Confidence interval, ADL activities of daily living, MNA-SF mini nutrition assessment-short form, AMT abbreviated mental test, FRAIL Fatigue, Resistance, Ambulation, Illness, Loss of weight
  2. *Variables with p<0.25 were selected for the multivariate analysis