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Table 4 Multinomial regression to determine factors that are associated with over-reporting and under-reporting of comorbidity (n = 100659)

From: A comparison of comorbidities obtained from hospital administrative data and medical charts in older patients with pneumonia

Explanatory variable Odds Ratio (95% confidence interval)
  Over-reporting vs. same-reporting Under-reporting vs. same-reporting
Age (per year) 1.003 (0.999 - 1.007) 1.010 (1.007 - 1.013)*
Male gender 1.009 (0.924 - 1.103) 1.057 (0.997 - 1.121)
Hospital admission in the previous 90 days 0.974 (0.879 - 1.079) 1.108 (1.039 - 1.182)*
Number of co-morbid conditions 1.013 (0.984 - 1.044) 1.443 (1.418 - 1.469)*
CURB score:   
   0 (reference) 1.000 1.000
   1 1.352 (1.219 - 1.500)* 1.109 (1.035 - 1.187)*
   ≥ 2 1.488 (1.303 - 1.700)* 1.058 (0.966 - 1.158)
Length of hospital stay (per day) 1.013 (1.011 - 1.015)* 1.000 (0.997 - 1.002)
Death in hospital 1.028 (1.118 - 1.379)* 1.028 (0.958 - 1.103)
  1. * Statistical significance at p-value < 0.05