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. 2012 Feb 21;4(1):77–82. doi: 10.1136/heartasia-2011-010079

Table 3.

Calculation of Net Reclassification Improvement (NRI) for the modified RAMA-EGAT score versus the traditional RAMA-EGAT score

+ Significant CAD (N=346) (Cases) Modified RAMA-EGAT score
RAMA-EGAT score Risk group Low Intermediate High Cases classified upward = 4+38 (12.14%)
Low 3 4 6 Cases classified downward = 4+17 (6.07%);
Intermediate 4 4 38 Cases classified upward-Cases classified downward = 12.14% − 6.07% = 6.07%
High 0 17 270
− Significant CAD (N=1045) (Non-cases) Modified RAMA-EGAT score
RAMA-EGAT score Risk group Low Intermediate High Cases classified upward = 40+121 (15.41%)
Low 106 40 48 Cases classified downward = 109+278 (37.03%)
Intermediate 109 81 121 Cases classified downward-Cases classified upward = 37.03% − 15.41% = 21.62%
High 59 278 203 NRI = 6.07% + 21.62% = 27.69%