Table 2

Prediction of inpatient mortality by admission score

Call-outGroup and scoreSensitivitySpecificityPPVNPV
Score ≥5COPD
 NEWS76% (61 to 88)57% (54 to 61)8% (5 to 11)98% (97 to 99)
 CREWS48% (32 to 64)88% (85 to 90)15% (10 to 23)97% (96 to 98)
 Salford-NEWS24% (12 to 39)91% (89 to 93)11% (5 to 19)96% (95 to 97)
AMU NEWS43% (40 to 46)90% (90 to 91)17% (16 to 19)97% (97 to 97)
Score ≥7COPD
 NEWS60% (43 to 74)80% (77 to 83)12% (8 to 18)98% (96 to 99)
 CREWS13% (6 to 23)96% (95 to 97)21% (10 to 37)93% (91 to 95)
 Salford-NEWS14% (5 to 29)95% (94 to 97)12% (5 to 25)96% (95 to 97)
AMU NEWS25% (23 to 28)96% (96 to 97)25% (22 to 28)96% (96 to 97)
  • Sensitivity, specificity, PPV, NPV (with 95% CIs) at RCP suggested NEWS thresholds of 5 points and 7 points for first AECOPD admission (n=942) using NEWS, CREWS, Salford-NEWS scores and the NEWS for the AMU cohort (n=20 415).

  • AECOPD, acute exacerbation of COPD; AMU, acute medical unit; CREWS, Chronic Respiratory Early Warning Score; NEWS, National Early Warning Score; NPV, negative predictive value; PPV, positive predictive value; RCP, Royal College of Physicians.