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Table 3 Unadjusted and adjusted hazard ratios for 30-day readmission among older patients discharged early from emergency departments

From: Readmission of older acutely admitted medical patients after short-term admissions in Denmark: a nationwide cohort study

 Unadjusted HR (95% CI)Adjusted HR (95% CI)1
Diseases of the cardiovascular system
 Angina Pectoris0.84 (0.76-0.94)0.83 (0.75-0.93)
 Atrial fibrillation0.93 (0.88-0.98)1.05 (1.00-1.11)
 Deep vein thrombosis0.75 (0.65-0.86)0.82 (0.71-0.94)
 Hypertension0.74 (0.66-0.84)0.86 (0.76-0.97)
 Heart failure1.56 (1.39-1.75)1.26 (1.12-1.41)
Diseases of the respiratory system
 COPD1.51 (1.41-1.62)1.33 (1.25-1.43)
 Respiratory failure1.74 (1.51-2.02)1.55 (1.34-1.79)
Diseases of the nervous system
 TIA0.49 (0.42-0.58)0.54 (0.46-0.63)
 Epilepsy0.74 (0.61-0.90)0.71 (0.59-0.86)
Endocrine and nutritional diseases
 Diabetes1.12 (0.95-1.33)0.90 (0.76-1.07)
 Dehydration1.35 (1.24-1.47)1.28 (1.17-1.39)
Diseases of the digestive system
 Dyspepsia0.75 (0.57-0.97)0.80 (0.62-1.04)
 Esophagitis0.82 (0.43-1.58)0.81 (0.42-1.55)
 Constipation1.34 (1.20-1.47)1.26 (1.14-1.39)
 Ulcer without bleeding0.80 (0.40-1.59)0.77 (0.39-1.55)
Hematological diseases
 Anemia1.72 (1.63-1.82)1.45 (1.38-1.54)
Infectious disease
 Erysipelas1.08 (0.93-1.26)1.08 (0.93-1.25)
 Gastroenteritis1.10 (0.93-1.30)1.10 (0.93-1.29)
 Pneumonia1.22 (1.13-1.32)1.15 (1.06-1.25)
 Urinary Tract Infection1.21 (1.13-1.30)1.15 (1.07-1.24)
Spinal disease/arthritis
 Back Pain0.93 (0.81-1.07)1.02 (0.88-1.17)
 Arthritis0.47 (0.29-0.76)0.51 (0.31-0.81)
Mental and behavioral disorders
 Misuse of drugs and alcohol0.83 (0.72-0.96)0.85 (0.74-0.99)
R-diagnoses2
 Chest pain0.74 (0.68-0.80)0.76 (0.70-0.82)
 Dyspnea1.38 (1.28-1.49)1.25 (1.15-1.35)
 Fever1.77 (1.55-2.02)1.52 (1.33-1.73)
 Headache0.74 (0.60-0.91)0.80 (0.65-0.99)
 Pains in neuromuscular system0.79 (0.68-0.92)0.80 (0.69-0.94)
 Abdominal pain1.08 (1.02-1.15)1.12 (1.05-1.19)
 Other pain1.11 (0.99-1.25)1.09 (0.96-1.22)
 Vertigo0.68 (0.61-0.77)0.73 (0.65-0.82)
 Other R-diagnoses1.21 (1.16-1.27)1.18 (1.13-1.23)
Z-diagnoses3
 Malignancy1.46 (1.32-1.60)1.51 (1.37-1.66)
 Central-nervous diseases0.63 (0.55-0.71)0.66 (0.58-0.75)
 Heart diseases0.75 (0.69-0.82)0.81 (0.74-0.88)
 Myocardial infarction0.66 (0.61-0.70)0.67 (0.62-0.72)
 Rehabilitation0.87 (0.83-0.92)0.88 (0.84-0.93)
 Other Z-diagnoses0.86 (0.79-0.93)0.88 (0.82-0.95)
  1. CI confidence interval. COPD chronic obstructive pulmonary disease. HR hazard ratio. TIA transient ischaemic attack
  2. 1Adjusted for age, gender, Charlson Comorbidity Index and marital status
  3. 2Used if symptoms, signs and abnormal clinical and laboratory findings are not elsewhere classified. 3 Used when a diagnosis has not yet been confirmed