Table 4.

Test Characteristics of Prediction Scores

Criterion for Positive ScoreSensitivity
(95% CI)
Specificity
(95% CI)
Positive Predictive
Value (95% CI)
Development set
 Nurse prediction only72%  (66,78)90%  (88,91)49%  (44,54)
 Prediction score A (objective predictors only), score ≥233%  (27,39)94%  (93,95)43%  (36,51)
 Prediction score B (objective predictors plus nurse prediction), score ≥276%  (70,81)86%  (84,87)43%  (38,47)
 Prediction score B (objective predictors) plus nurse prediction, score ≥349%  (43,55)95%  (94,96)57%  (50,64)
Validation set
 Nurse prediction only71%  (58,82)88%  (84,91)42%  (33,52)
 Prediction score A (objective predictors only), score ≥231%  (20,44)94%  (91,96)40%  (26,55)
 Prediction score B (objective predictors plus nurse prediction), score ≥274%  (61,84)84%  (81,87)37%  (29,46)
 Prediction score B (objective predictors) plus nurse prediction, score ≥346%  (33,59)94%  (91,96)49%  (36,63)