3.3 Long-term follow-up and survival
Of the 20 patients, 1 patient was lost to follow-up, and one patient died. The median treatment time was 79 (33-129) months, and the OS 10 years after diagnosis was estimated to be 121 months. We analyzed the overall survival of 19 PNH patients in terms of age, Hb level and LDH elevation. The results showed that there was no significant difference in the effects of the above factors on survival (Fig. 3).