
468 Dong
Investigación Clínica 64(4): 2023
A total of 58 patients (24.78%) in this
study’s test set (n=234) had PTDM within
one year after surgery. PTDM is a major
cause of postoperative serious infection and
even death in patients. Herein, preoperative
BMI, family history of diabetes mellitus, 2-h
preoperative and postprandial blood glu-
cose, 2-h preoperative and postprandial pep-
tide index, postoperative hypomagnesemia,
the whole blood concentration of tacroli-
mus, triacylglycerol, glycated albumin, and
fasting blood glucose were all determined in
the univariate analysis to be influencing fac-
tors of PTDM in patients. BMI, family history
of diabetes mellitus, 2-h preoperative and
postprandial blood glucose, and postopera-
tive whole blood concentration of tacrolimus
were independent risk factors for PTDM. In
contrast, the 2-h preoperative and postpran-
dial peptide index was an independent pro-
tective factor for PTDM, as revealed by the
multivariate logistic regression analysis re-
sult. The close correlation of BMI with the
occurrence of PTDM in kidney transplant
recipients has been reported in previous lit-
erature 11.
According to a study on the Korean
population 12, kidney transplant recipients
with BMI ≥25 kg/m2 suffered a 3.64 times
higher risk of PTDM than those with BMI<
25 kg/m2. A possible mechanism is that
obesity triggers chronic inflammation and
stimulates pancreatic beta cells, thus caus-
ing insulin resistance and reduced glucose
clearance rate, eventually increasing the risk
of PTDM. It was found in a study 13 that a
family history of diabetes presented a sig-
nificant correlation with the risk of PTDM.
People with a family history of diabetes may
be subjected to abnormal glucose metabo-
lism, which in turn influences the function
of pancreatic β-cells and thus causes abnor-
mal changes in postoperative blood glucose
levels and even the occurrence of PTDM.
Hence, for patients with a family history of
diabetes mellitus, measures should be taken
to closely monitor their blood glucose and
carry out timely interventions to reduce the
incidence rate of PTDM. A related study 14
published by the ADA showed that the ma-
jority of patients experience an abnormal
glucose tolerance stage before diabetes de-
velopment, and those showing abnormal
glucose tolerance possibly become potential
diabetic patients. The study of Sato et al. 15
unveiled that preoperative glucose tolerance
was a risk factor for postoperative diabetes
in transplant recipients. The 2-h postpran-
dial peptide index, which reflects the func-
tion of pancreatic islet B cells and reduces
with the increasing duration of type 2 diabe-
tes mellitus, is related to insulin sensitivity
and is considered a protective factor against
PTDM in transplant recipients 16. Moreover,
tacrolimus is a typical drug for treating anti-
rejection reactions. Its significantly positive
correlation with the occurrence of PTDM and
stronger sugar-causing effect than cyclospo-
rine A 17 has been revealed. Additionally, for
patients receiving kidney transplantation,
the administration of tacrolimus can reduce
the synthesis and secretion of insulin in the
body, increasing the body’s blood glucose
level and thus resulting in diabetes 18. Fur-
ther, some believe that other important in-
fluencing factors on the occurrence of PTDM
in transplant recipients include hypomagne-
semia and rejection 19. However, no statisti-
cally significant difference in rejection was
found between the two groups of patients in
this study. In addition, postoperative hypo-
magnesemia was found in the multivariate
analysis not to be an independent influence
factor of PTDM, possibly related to the small
sample size of this study, which failed to
present statistical differences.
Based on the influencing factors on the
occurrence of PTDM in kidney transplant
recipients, the nomogram model was built
in this study, whose predictive performance
was evaluated with the ROC curve, calibra-
tion curve, and clinical decision curve. The
results showed that the predicted value ap-
proximated the actual observed value, sig-
nifying high discrimination and clinical va-
lidity of the model. Compared with a single