CRB-65 Comorbidities group A group B 0 COPD 30% 28%   CHF 5% 11%   CRF 1% 12%   DM 5% 10%   CVD 3% 7%   CLD 0.5 % 0.5% 1 COPD 34% 34%   CHF 4% 11%   CRF 0.5% 12%   DM 5% 9%   CVD 3% 7%   CLD 0.8% 2% 2/3 COPD 30% 29%   CHF 5% 12%   CRF 1% 12%   DM 5% 16%*   CVD 6% 25%**   CLD 0.5% 1% *p<0.01 vs. CRB-65 0/1; **p<0.01 vs CRB-65 0/1 COPD: chronic obstructive pulmonary disease, CHF: congestive heart failure, CRF: chronic renal failure, DM: diabetes mellitus, CVD: cerebrovascular disease, CLD: chronic liver disease

Table 2: Comorbidities of outpatients (group A) n=1403 and subsequent hospitalized outpatients (group B) n=114 dependent on CRB-65 risk classes.