Figure 2
Kaplan-Meier survival functions according to grade and lymph node status.A. Overall survival according to tumour grade, based on 769 case subjects with total time at risk 5651.67 years. Numbers at risk at the end of the 10-year analysis period shown were 111 (grade 1), 203 (grade 2), 128 (grade 3). Hazard ratio (95% CI) 1.59 (1.30, 1.96), p = 1.0 × 10-5. B. Overall survival according to lymph node status, based on 786 case subjects with total time at risk 5808.75 years. Numbers at risk at the end of the 10-year analysis period were 316 (node negative) and 108 (node positive). Hazard ratio (95% CI) 2.59 (1.92, 3.48), p = 3.2 × 10-10.