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. Author manuscript; available in PMC: 2019 Mar 1.
Published in final edited form as: J Pain Symptom Manage. 2017 Dec 6;55(3):792–797. doi: 10.1016/j.jpainsymman.2017.11.028

Table 3.

Net Reclassification Table

PPI better than CPS N (%)1 CPS better than PPI N (%)1 NRI (from CPS to PPI)2(95% CI) P-value
Died within 30 days 19 (58) 14 (42) 67% (31%, 103%) 0.0005
Alive after 30 days 123 (76) 39 (24)
Died within 100 days 43 (47) 48 (53) 20% (−9%, 48%) 0.19
Alive after 100 days 55 (63) 33 (37)

Abbreviations: CI, confidence interval; CPS, clinician prediction of survival; NRI, net reclassification improvement; PPI, palliative prognostic index

1

We applied logistic regression modeling to compute the probability of an outcome of interest (e.g. death within 30 or 100 days) for each prognostication approach (i.e. CPS or PPI). We then compared the outcomes for each approach. Each cell shows the number of patients in which the probability of having the outcome based on one prognostication approach is closer to predicting the outcome than the other approach, along with the row percentage in parenthesis.

2

The percentage of subjects who were correctly reclassified using PPI instead of CPS. A positive value indicates better discrimination.