Table 5.

PPA and NPA and calculated AUC of the software algorithm compared with a clinical diagnosis of CAP

PPA, % (95% CI) (n= CAP positive)NPA, % (95% CI) (n= CAP negative)AUC (95% CI)
Total cohort (N= 322)
86.2 (79.8 to 91.1) (n= 159)86.5 (80.3 to 91.3) (n= 163)0.95 (0.93 to 0.97)
22–<65 years (N= 192)
85.7 (76.4 to 92.4) (n = 84)87.0 (79.2 to 92.7) (n= 108)0.94 (0.91 to 0.97)
≥65 years (N= 86)
85.7 (75.3 to 92.9) (n= 70)87.5 (61.7 to 98.4) (n= 16)0.95 (0.91 to 0.97)
  • AUC = area under curve. CAP = community-acquired pneumonia. NPA = negative percentage agreement. PPA = positive percentage agreement.