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Table 1 Patient characteristics

From: Improving antibiotic prescribing for adults with community acquired pneumonia: Does a computerised decision support system achieve more than academic detailing alone? – a time series analysis

Variable Baseline Academic detailing Computerised decision support Pvalue#
  N = 392 N = 215 N = 133  
Age: median (range) 74 (18–96) 73 (18–98) 79 (18–98) 0.05
Sex Female: n (%) 158 40.0% 100 46.0% 60 45.1% 0.29
Nursing home residents: n (%) 55 14.0% 31 14.0% 18 13.5% 0.97
Suspected aspiration: n (%) 39 9.9% 20 9.3% 7 5.3% 0.25
Antibiotics prior to ED: n (%) 100 25.5% 54 25.1% 18 13.5% 0.01
Known beta lactam allergy n (%) 42 10.7% 23 10.6% 21 15.8% 0.25
   Non-immediate 13   6   15   
   Uncertain 21   17   2   
   Immediate 8   0   4   
PSI class (%)        
   I 11.9%   13.4%   12.8%   
   II 14.5%   17.2%   14.3%   
   III 17.3%   14.8%   11.3%   
   IV 33.4% }56.1% 28.8% }54.4% 31.5% }61.6% 0.39
   V 22.7%   25.6%   30.1%   
CURB severe n (%) 182 46.4% 96 44.6% 55 41.3% 0.65
ICU admission any time n (%) 26 6.6% 12 5.6% 10 7.5% 0.76
Length of stay – days, median (range) 4 (1–76) 4 (1–51) 4 (1–41) 0.93
Death: Total n (%) 37 9.4% 14 6.5% 21 15.7% 0.15*
Death: (excl. died in ED) n (%) 35/390 8.9% 12/213 6.5% 16/128 7.8% 0.23*
Comorbidities: (%)        
   CCF 20.4   15.3   18.0   0.30
   COAD 23.4   15.3   26.3   0.02
   Neoplasia 13.7   14.4   16.5   0.73
   CRF 11.9   13.0   12.7   0.92
   Dementia 13.2   14.4   21.0   0.09
   Alcohol 9.6   7.9   5.2   0.27
   CVA 18.8   17.6   12.8   0.27
   Diabetes 22.2   22.7   19.5   0.76
   Age >85 19.6   12.5   27.0   <0.01
  1. * Adjusted for age, # p values calculated using chi squared test for categorical variables and analysis of variance for continuous variables
  2. ED: Emergency department, ICU: Intensive care unit, PSI: Pneumonia Severity Index, CURB: modified British Thoracic Society Severity score, CCF: Congestive cardiac failure, COAD: Chronic obstructive airways disease, CRF: Chronic renal failure, CVA: Cerebrovascular disease