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Table 3 NRI and IDI between different models

From: Novel physical performance-based models for activities of daily living disability prediction among Chinese older community population: a nationally representative survey in China

  NRI (95%CI) P value IDI (95%CI) P value
Model 1 vs Model 2 0.146 (0.026–0.265) 0.017* 0.005 (0.001–0.009) 0.011*
Model 1 vs Model 3 0.406 (0.288–0.524) < 0.001* 0.035 (0.024–0.045) < 0.001*
Model 1 vs Model 4 0.367 (0.251–0.484) < 0.001* 0.014 (0.008–0.019) < 0.001*
Model 1 vs Model 5 0.396 (0.278–0.514) < 0.001* 0.036 (0.025–0.046) < 0.001*
Model 1 vs Model 6 0.341 (0.224–0.459) < 0.001* 0.017 (0.010–0.023) < 0.001*
Model 2 vs Model 5 0.358 (0.239–0.476) < 0.001* 0.031 (0.021–0.040) < 0.001*
Model 2 vs Model 6 0.346 (0.229–0.463) < 0.001* 0.012 (0.007–0.017) < 0.001*
Model 3 vs Model 5 0.058 (0.062–0.178) 0.341 0.001 (0.010–0.023) 0.276
Model 4 vs Model 6 0.071 (0.049–0.191) 0.247 0.003 (0.000–0.006) 0.049
  1. Note. IDI Integrated Discrimination Improvement, NRI Net Reclassification Improvement; Model 1 incorporated seven predictors, including gender, age, smoking, self-report health condition, BMI, depressive symptoms, and cognitive function. Besides, five physical performance-based models were established based on Model 1, adding handgrip strength (Model 2), SPPB (Model 3), gait speed (Model 4), handgrip strength plus SPPB (Model 5), and handgrip strength plus gait speed (Model 6), respectively
  2. *p < 0.05