Table 5—

Performance of the British Thoracic Society (BTS) and modified BTS severity prediction rules

Prediction ruleSensitivitySpecificityPPVNPV
BTS rule32/64 (50)44/69 (64)32/57 (56)44/76 (58)
Modified  BTS rule43/64 (67)40/69 (58)43/72 (60)40/61 (66)
  • Data are presented as n (%). Based on 64 cases and 69 controls with complete data for assessment of the respective rules.