ObjectiveTo study relevant factors for the postoperative recurrence in patients of nodular goiter. Method Nine clinical factors were recruited for the study in relation to postoperative recurrence of 230 patients with nodular goiter.Data were analyzed by ? 2 test and Logistic regression.Result Two independent factors were found significantly in relation to recurrence(B=-1 652?6,B=1 070?7, P

Objective:To study the levels of serum ferritin (SF) in preterm infants of different gestational ages and analyze the influencing factors.Method:From October 2018 to October 2020, preterm infants hospitalized in our hospital were included for prospective study. According to the gestational age, the infants were assigned into 3 groups: 34~36 w group, 32~33 w group and <32 w group. The SF levels were compared among the groups and the influencing factors were analyzed.Result:A total of 919 preterm infants were included, including 481 in the 34~36 w group, 293 in the 32~33 w group and 145 in the <32 w group. The incidence of Cesarean section in the <32 w group was lower than the other two groups ( P<0.001). The incidence of twin birth in the 32~33 w group was higher than the other two groups ( P<0.05). No significant differences existed in gender among the three groups ( P>0.05). The serum SF levels in the 34~36 w group, 32~33 w group and <32 w group were (240.1±167.4), (216.2±137.0) and (204.4±112.8)μg/L, respectively. The serum SF levels in the 34~36 w group were higher than the other two groups ( P<0.05). No significant differences existed in serum SF levels between the 32~33 w group and the <32 w group ( P>0.05). Multiple　linear　regression　analysis　showed　that SF levels were lower in premature infants with small gestational age and Cesarean section delivery ( P<0.05). Conclusion:SF levels in premature infants with small gestational age and Cesarean section delivery are lower and more monitoring of SF are needed.