Table 3.

Test and treatment thresholds by univariate subgroups in comparison with true disease probability

SubgroupProbability of CAP (95% CI)P-value of the difference
Test thresholds
Practice type
  Primary care9.6 (8.6 to 10.7)0.666
  Non-primary9.1 (7.1 to 11.3)
Radiography proximity
  On site9.1 (8.0 to 10.3)0.283
  Not on site10.1 (8.7 to 11.6)
Time in practice, years
  0–109.0 (7.7 to 10.4)0.230
  >1010.1 (8.9 to 11.5)
Site
  US9.8 (8.8 to 10.9)0.334
  Swiss8.8 (7.1 to 10.6)
Treatment thresholds
Practice type
  Primary care41.2 (37.9 to 44.9)0.002a
  Non-primary53.7 (46.5 to 61.6)
Radiography proximity
  On site46.4 (42.4 to 50.9)0.028a
  Not on site39.8 (35.4 to 44.6)
Time in practice, years
  0–1044.7 (40.5 to 49.5)0.619
  >1043.2 (39.0 to 48.0)
Site
  Swiss53.9 (47.4 to 61.0)<0.001a
  US40.1 (36.9 to 43.6)
  • a Statistically significant difference between subgroups. CI = confidence interval. CAP = community-acquired pneumonia.