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Table 2 Multivariable logistic regression model for ICU admission in the American cohorta

From: Intensive care unit capacity and mortality in older adults: a three nations retrospective observational cohort study

Variable Odds ratio (95% CI) P value Coefficient
Female 0.94 (0.89–0.99) 0.046 − 0.059
Age    
 90 and above
 86–89
 83–85
 80–82
0.82 (0.75–0.89)
0.85 (0.79–0.92)
0.96 (0.88–1.04)
1
 < 0.001
 < 0.001
0.27
Reference
− 0.202
− 0.161
− 0.044
Reference
LAPS score    
 38 and higher
 24–37
 15–23
 6–14
 0–5
14.65 (12.88–16.65)
3.43 (3.01–3.91)
2.03 (1.77–2.32)
1.35 (1.16–1.58)
1
 < 0.001
 < 0.001
 < 0.001
 < 0.001
Reference
2.684
1.234
0.707
0.304
Reference
Charlson comorbidity index    
 7 and higher
 6
 0–5
0.92 (0.85–1.002)
0.86 (0.8–0.92)
1
0.05
 < 0.001
Reference
0.079−
− 0.151
Reference
Primary diagnosisb
 Acute respiratory failure 21.61 (12.53–37.25)  < 0.001 3.073
 Sepsis 4.87 (4.27–5.55)  < 0.001 1.583
 Stroke and TIA 2.25 (1.91–2.64)  < 0.001 0.81
 DVT PE 1.45 (1.11–1.91) 0.01 0.374
 Acute pancreatitis 0.88 (0.59–1.32) 0.55 − 0.123
 Pneumonia 0.85 (0.73–0.99) 0.03 − 0.165
 Cholecystitis/cholangitis 0.81 (0.6–1.11) 0.2 − 0.205
 Atrial fibrillation/flutter 0.73 (0.58–0.92) 0.01 − 0.313
 Heart failure 0.72 (0.64–0.81)  < 0.001 − 0.332
 Femoral fracture 0.55 (0.45–0.66)  < 0.001 − 0.602
 Dyspnea 0.21 (0.08–0.53)  < 0.001 − 1.557
 Fever 0.17 (0.06–0.47)  < 0.001 − 1.779
 UTI 0.17 (0.13–0.23)  < 0.001 − 1.756
 Syncope 0.09 (0.04–0.18)  < 0.001 − 2.403
  1. LAPS laboratory-based Acute Physiology Score, ICU intensive care unit, URTI upper respiratory tract infection, DVT PE deep vein thrombosis and pulmonary embolism, TIA transient ischemic attack, COPD chronic obstructive pulmonary disease, UTI urinary tract infection
  2. aThe model has c-statistic of 0.8, demonstrating good discrimination
  3. bDiagnoses that were included in the model but do not appear in the table: abdominal pain, URTI, anemia, cellulitis, dizziness, hyponatremia, COPD