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. 2016 Jul 7;6:29466. doi: 10.1038/srep29466

Table 3. Risk group classifications.

Risk Group Prognostic Score Patients n (%) Mean time to recurrence (months)
Low 0 99(40.9) 45.23(95% CI: 39.54–50.91)
Medium 1 123(50.8) 24.74(95% CI: 20.9–28.59)
High 2–3 20(8.3) 7.75(95% CI: 5.97–9.53)

The prognostic score was calculated as follows: eGFR (60–20 ml/min) × 0.56/1.199 + eGFR (<20 ml/min) × 1.199 /1.199 + Current-Smoker × 1.128/1.199 + Heavy-areca nut chewing × 0.778/1.199 + Grade-high × 0.663/1.199.