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Table 1 Characteristics of study group (N = 1402)

From: Impact of data source and time reference of functional status on hospital mortality prediction

Characteristics Study Group
Mean age, y (SD) 77.8 (7.8)
Female, % 59.7
Ethnic Group, %  
Chinese 81.0
Malay 9.6
Indian 7.3
Others 2.1
Marital status  
Married 45.4
Widowed 50.4
Single 2.9
Divorced/Separated 1.4
Housing type*  
1-2 room public flat 8.9
3-5 room public flat 73.1
Private housing 11.9
Others (Sheltered housing) 6.0
Primary Diagnosis ≥1% Prevalence, %  
Pneumonia 16.6
Diabetes Mellitus with End Organ Damage 4.5
Congestive Heart Failure 2.3
Chronic Obstructive Pulmonary Disease 2.0
Renal Failure 1.9
Sepsis 1.8
Acute Myocardial Infarction 1.7
Cancer (solid tumor, localized) 1.2
Major Stroke (hemiplegia) 1.1
Charlson Comorbidity Index, %  
= 0 17.5
= 1 23.5
= 2 21.7
≥ 3 37.3
Pre-admission, Any ADL Impairment, % † 47.6
On-admission, Any ADL Impairment, % † 50.4
Hospital mortality, % 6.0
  1. * Missing data were present for the following variables: Housing type (9 subjects).
  2. † Based on interview with patients and their proxies.
  3. S.D: standard deviation; ADL: Activities of Daily Living.