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Table 2 Univariable and multivariable logistic regression

From: FAM-FACE-SG: a score for risk stratification of frequent hospital admitters

Variable Unadjusted OR (95% CI) p-value Adjusted OR (95% CI) p-value*
Patient Demographics
 Age 1.03 (1.02, 1.03) <0.001 1.01 (1.01, 1.017) <0.001
 Gender (Male) 1.05 (0.97, 1.13) 0.254 1.02 (0.93, 1.12) 0.671
Ethnicity
 Others Baseline    
 Chinese 1.14 (1.04, 1.25) 0.004 0.90 (0.70, 1.16) 0.407
 Indian 0.93 (0.81, 1.06) 0.300 1.18 (0.89, 1.59) 0.249
 Malay 1.16 (1.03, 1.30) 0.015 1.04 (0.79, 1.39) 0.764
Indicators of Socioeconomic Status
 Required financial assistance using Medifund 2.64 (2.02, 3.43) <0.001 1.49 (1.08, 2.04) 0.015
 Stayed in a subsidized ward during index admission 3.07 (2.72, 3.47) <0.001 4.05 (2.54, 6.85) <0.001
Past Healthcare Utilization
 ED visits (6 month before index admission) 1.47 (1.41,1.53) <0.001 1.15 (1.09, 1.22) <0.001
 Specialist Clinic visits (1 year before index admission) 1.07 (1.06, 1.07) <0.001 1.01 (1.00, 1.02) 0.088
 Hospital admissions (1 year before index admission) 1.77 (1.70, 1.84) <0.001 1.32 (1.26, 1.39) <0.001
Markers of Acute Illness Burden
 Index admission was urgent 1.45 (1.32, 1.61) <0.001 0.92 (0.73, 1.16) 0.465
 Required second line antibiotics during index admission 1.54 (1.30, 1.80) <0.001 1.07 (0.86, 1.32) 0.534
 Required inpatient dialysis during index admission 5.30 (4.48, 6.27) <0.001 1.72 (1.38, 2.15) <0.001
 Required intravenous Furosemide 40 mg and above during index admission 2.75 (2.40, 3.14) <0.001 1.26 (1.07, 1.48) 0.005
 Required isolation during index admission 1.64 (1.19, 2.22) 0.002 1.19 (0.81, 1.72) 0.375
 Length of stay of index admission 1.02 (1.01, 1.02) <0.001 1.00 (1.00, 1.00) 0.919
 Charlson Comorbidity Indexa 1.41 (1.38, 1.42) <0.001 1.31 (1.28, 1.33) <0.001
Medical Comorbiditiesb
 Stroke 0.99 (0.72, 1.34) 0.945 0.93 (0.64, 1.34) 0.712
 Metastatic Disease 1.09 (0.97, 1.24) 0.154 1.07 (0.90, 1.28) 0.43
 Non-metastatic malignancy 1.00 (0.90, 1.11) 0.973 0.96 (0.83, 1.11) 0.569
 Peripheral Vascular Disease 1.01 (0.83, 1.23) 0.904 1.10 (0.86, 1.40) 0.456
 Heart Failure or Fluid Overload 1.11 (0.98, 1.24) 0.093 1.00 (0.84,1.19) 0.978
 Pressure Ulcer 1.09 (0.88, 1.34) 0.435 1.14 (0.88,1.48) 0.307
 Thromboembolism 1.21 (1.04, 1.41) 0.014 1.21 (1.00,1.46) 0.045
 Spine Fracture 1.14 (0.90, 1.43) 0.266 1.05 (0.79, 1.38) 0.743
 Coronary Heart Disease or Myocardial Infarction 1.19 (1.07, 1.33) 0.001 1.1 (0.94, 1.29) 0.225
 Hip Fracture 0.93 (0.70, 1.22) 0.607 0.96 (0.69, 1.32) 0.795
 Atrial Fibrillation 1.16 (1.00, 1.33) 0.042 1.1 (0.92, 1.32) 0.302
 Epilepsy 1.02 (0.68, 1.48) 0.933 0.82 (0.51, 1.28) 0.394
 Parkinsonism 1.32 (0.98, 1.74) 0.062 1.43 (1.01, 2.00) 0.043
 Anxiety 0.76 (0.48, 1.16) 0.229 0.57 (0.33, 0.92) 0.028
 Bipolar Disorder 1.13 (0.51, 2.23) 0.745 1.18 (0.48, 2.65) 0.699
 Collagen Vascular Disease 0.85 (0.60, 1.17) 0.338 0.76 (0.51, 1.12) 0.175
 Dementia 0.93 (0.75, 1.16) 0.537 0.91 (0.70, 1.18) 0.498
 Hypothyroidism 0.88 (0.66, 1.15) 0.352 0.93 (0.67, 1.28) 0.681
 Chronic Kidney Disease, Stages 1–4 1.09 (0.98, 1.21) 0.095 0.97 (0.79, 1.18) 0.731
 Chronic Obstructive Pulmonary Disease 1.01 (0.79, 1.27) 0.947 1.07 (0.80,1.41) 0.648
 Osteoarthritis 0.96 (0.83,1.11) 0.582 0.90 (0.75, 1.07) 0.223
 Benign Prostatic Hypertrophy 0.94 (0.77, 1.12) 0.489 0.95 (0.76,1.18) 0.619
 Asthma 1.11 (0.89, 1.38) 0.354 1.22 (0.93, 1.59) 0.152
 Hyperlipidemia 1.09 (1.00, 1.19) 0.04 0.99 (0.85, 1.14) 0.868
 Hypertension 1.07 (0.99, 1.16) 0.085 0.96 (0.83, 1.11) 0.587
 Chronic Kidney Disease Stage 5 or End Stage Renal Failure 1.13 (1.01, 1.26) 0.035 1.03 (0.83, 1.28) 0.81
 Diabetes 1.07 (0.98, 1.17) 0.12 1.03 (0.90, 1.17) 0.71
 History of Alcoholism 1.24 (0.93, 1.64) 0.138 0.91 (0.64, 1.27) 0.582
 Treatment with anti-depressantsc 4.00 (3.60, 4.44) <0.001 2.33 (2.06, 2.64) <0.001
  1. OR odds ratio, ED emergency department, ICD international classification of diseases
  2. *Statistical significance was set as p < 0.02
  3. Variables selected for building final logistic regression model
  4. aBased on ICD codes of index admission
  5. bBased on ICD codes in the preceding seven years
  6. cBased on discharge and outpatient prescriptions in the preceding one year