Figure 3. Kaplan-Meier survival analysis of severely paraquat-poisoned patients who received repeated pulse therapy with early hemoperfusion (<5 h; n = 21, 12/21 = 57.1%) and those that received late hemoperfusion (≥5 h; n = 115, 39/115 = 33.9%).

Log-rank tests, Chi-square = 4.47; P = 0.035.