Table 4 A comparative evaluation of NRI and IDI in predictive models for 28-day mortality in geriatric individuals with ischemic stroke.

From: Development and verification of a nomogram for predicting short-term mortality in elderly ischemic stroke populations

Index

Development dataset

Validation dataset

Estimate

95% CI

P-value

Estimate

95% CI

P-value

NRI (vs. SOFA)

0.304

0.225–0.384

 < 0.001

0.333

0.218–0.448

 < 0.001

NRI (vs. APS III)

0.205

0.123–0.286

 < 0.001

0.107

0.038–0.251

0.148

NRI (vs. LODS)

0.244

0.162–0.327

 < 0.001

0.257

0.135–0.379

 < 0.001

NRI (vs. SAPS II)

0.275

0.193–0.357

 < 0.001

0.190

0.047–0.333

0.009

NRI (vs. OASIS)

0.209

0.133–0.285

 < 0.001

0.160

0.024–0.297

0.022

IDI (vs. SOFA)

0.201

0.169–0.232

 < 0.001

0.164

0.114–0.213

 < 0.001

IDI (vs. APS III)

0.126

0.096–0.157

 < 0.001

0.067

0.013–0.121

0.016

IDI (vs. LODS)

0.146

0.115–0.177

 < 0.001

0.121

0.071–0.171

 < 0.001

IDI (vs. SAPS II)

0.155

0.121–0.188

 < 0.001

0.094

0.039–0.149

0.001

IDI (vs. OASIS)

0.118

0.090–0.146

 < 0.001

0.062

0.012–0.112

0.014

  1. NRI net reclassification index, IDI integrated discrimination improvement, CI confidence interval, SOFA sequential organ failure assessment, APS III acute physiology score III, LODS logistic organ dysfunction system, SAPS II simplified acute physiology score II, OASIS Oxford acute severity of illness score.
  2. Cutoff: 0, 0.4, 0.8, 1.
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