3.3. Secondary endpoints
blood coagulation
Among the four indexes of blood coagulation at 10 min after tube locking, after adjusting the PT index before tube locking, the heparin group increases compared with the sodium citrate group (LSMD = 0.86, 95%CI 0.12 to 1.61, Since the four indexes of blood coagulation are missing 7 d after the tube locking, the MICE method is used to fill in them. Compared with the sodium citrate group, the APTT (LSMD = 8.05, 95%CI 6.71 to 9.4, 