Objective To explore the relationship between perceived stress and suicidal ideation as well as the mediating effect of resilience and depression.Methods A sample of 875 college students was recruited for the study to complete a set of self-report measures of Chinese Perceived Stress Scale(CPSS),the Resiliency Scale of University Students,Suicidal Ideation Questionnaire,and Beck Depression Inventory(BDI).Results ①College students'perceived stress and depression had significantly positive correlation with their suicidal ideation,while the students'resilience had a significantly negative correlation with their perceived stress and depression.②Perceived stress did not affect suicidal ideation of the college students directly,but indirectly affected their suicidal ideation through three significant mediating pathways:the separate mediating effects of(a)resilience and(b)depression,and the serial mediating effect of(c)resilience and depression.Conclusion Resilience and depression exert a chain mediating effect between perceived stress and suicidal ideation of college students.

To study the correlation between the level of Bordetella pertussis nucleic acid and clinical features of the disease in infants and young children and to investigate the risk factors for the development of severe pertussis. Using retrospective research methods, children aged 1 month-3 years who came to Hunan Children′s Hospital from August 2023 to February 2024 and were diagnosed with pertussis for analysis. According to the logarithmic value of BP-DNA (log 10 copies/ml), 35 cases were divided into the low load group, 78 cases were divided into the medium load group and 94 cases were divided into the high load group; 54 cases were divided into the severe whooping cough group and 153 cases were divided into the general group according to the severity of the disease; the clinical characteristics and laboratory data of the groups were compared, and the risk factors for the occurrence of severe whooping cough were analyzed at the same time. The ROC was used to evaluate the predictive efficacy of BP-DNA and WBC count for the development of severe pertussis. The results showed that in the high-dose group, the WBC count(22.59×10 9/L), L/N ratio(3.31), and hospitalization days(9.0 d) were significantly higher than those in the medium-dose group and low-dose group ( F=6.309, 2.825, 15.149, all P<0.05). The hospitalization rate (100%), combined infection rate (64.96%), incidence of severe whooping cough (31.9%), pyrexia rate (29.8%), and corticosteroid use rate (57.4%) were also significantly higher than the other two groups ( χ2=25.977, 9.163, 9.371, 8.299, 20.332, all P<0.05), and the complete immunity rate (9.6%) was significantly lower than the other two groups ( χ2=11.632, P<0.05). Compared with the group of common whooping cough, the proportion of children under 1 year old (100%, χ2=9.581), the BP-DNA load (6.56 log 10 copies/ml, Z=4.004), the WBC count(31.34×10 9/L, t=7.513), the PCT level(0.07 ng/ml, Z=2.626), the IL-6 level (6.65 ng/ml, Z=4.336), the combined infection rate (88.9%, χ2=36.536), the incidence of wheezing or dyspnea (55.6%, χ2=42.972), the rate of no improvement of symptoms with macrolides prior to the visit (77.8%, χ2=26.266), and the incidence of fever (55.6%, χ2=42.972) were all significantly higher;the complete immunity rate was significantly lower (5.6%, χ2=9.581) in the severe whooping cough group, the differences were all statistically significant(all P<0.05).The result of logistic regression analysis showed severe elevation of BP-DNA, high leukocyte count, co-infection, wheezing or shortness of breath, pyrexia and no improvement of symptoms with macrolides before the treatment were the risk factors for the development of severe pertussis and the logistic regressive model predicts a sensitivity and specificity of 0.83 and 0.90 for severe whooping cough, respectively. The sensitivity of BP-DNA>1.91×10 6 copies/ml, WBC count >19.97×10 9/L and the binominal combined test to predict the occurrence of severe pertussis were 0.87, 0.61 and 0.80, and the specificity were 0.43, 0.86 and 0.73, respectively. In conclusion, nucleic acid load in infants with pertussis correlated with clinical characteristics such as the active immunity status, fever, co-infections and hospitalisation and days in hospital. Children with high nucleic acid load, high white blood cell counts, co-infections, fever and no improvement of symptoms with macrolides prior to seeing a doctor were more likely to develop the severe pertussis. When BP-DNA >1.91×10 6 copies/ml or WBC counts>19.97×10 9/L, they have the highest predictive efficacy for severe pertussis respectively, and combined detection is better.

To study the correlation between the level of Bordetella pertussis nucleic acid and clinical features of the disease in infants and young children and to investigate the risk factors for the development of severe pertussis. Using retrospective research methods, children aged 1 month-3 years who came to Hunan Children′s Hospital from August 2023 to February 2024 and were diagnosed with pertussis for analysis. According to the logarithmic value of BP-DNA (log 10 copies/ml), 35 cases were divided into the low load group, 78 cases were divided into the medium load group and 94 cases were divided into the high load group; 54 cases were divided into the severe whooping cough group and 153 cases were divided into the general group according to the severity of the disease; the clinical characteristics and laboratory data of the groups were compared, and the risk factors for the occurrence of severe whooping cough were analyzed at the same time. The ROC was used to evaluate the predictive efficacy of BP-DNA and WBC count for the development of severe pertussis. The results showed that in the high-dose group, the WBC count(22.59×10 9/L), L/N ratio(3.31), and hospitalization days(9.0 d) were significantly higher than those in the medium-dose group and low-dose group ( F=6.309, 2.825, 15.149, all P<0.05). The hospitalization rate (100%), combined infection rate (64.96%), incidence of severe whooping cough (31.9%), pyrexia rate (29.8%), and corticosteroid use rate (57.4%) were also significantly higher than the other two groups ( χ2=25.977, 9.163, 9.371, 8.299, 20.332, all P<0.05), and the complete immunity rate (9.6%) was significantly lower than the other two groups ( χ2=11.632, P<0.05). Compared with the group of common whooping cough, the proportion of children under 1 year old (100%, χ2=9.581), the BP-DNA load (6.56 log 10 copies/ml, Z=4.004), the WBC count(31.34×10 9/L, t=7.513), the PCT level(0.07 ng/ml, Z=2.626), the IL-6 level (6.65 ng/ml, Z=4.336), the combined infection rate (88.9%, χ2=36.536), the incidence of wheezing or dyspnea (55.6%, χ2=42.972), the rate of no improvement of symptoms with macrolides prior to the visit (77.8%, χ2=26.266), and the incidence of fever (55.6%, χ2=42.972) were all significantly higher;the complete immunity rate was significantly lower (5.6%, χ2=9.581) in the severe whooping cough group, the differences were all statistically significant(all P<0.05).The result of logistic regression analysis showed severe elevation of BP-DNA, high leukocyte count, co-infection, wheezing or shortness of breath, pyrexia and no improvement of symptoms with macrolides before the treatment were the risk factors for the development of severe pertussis and the logistic regressive model predicts a sensitivity and specificity of 0.83 and 0.90 for severe whooping cough, respectively. The sensitivity of BP-DNA>1.91×10 6 copies/ml, WBC count >19.97×10 9/L and the binominal combined test to predict the occurrence of severe pertussis were 0.87, 0.61 and 0.80, and the specificity were 0.43, 0.86 and 0.73, respectively. In conclusion, nucleic acid load in infants with pertussis correlated with clinical characteristics such as the active immunity status, fever, co-infections and hospitalisation and days in hospital. Children with high nucleic acid load, high white blood cell counts, co-infections, fever and no improvement of symptoms with macrolides prior to seeing a doctor were more likely to develop the severe pertussis. When BP-DNA >1.91×10 6 copies/ml or WBC counts>19.97×10 9/L, they have the highest predictive efficacy for severe pertussis respectively, and combined detection is better.

The process of sex development in children is complex and sequential. The diseases and etiologies associated with sex development are various, and laboratory indexes evaluating the diseases are scarce, which lead to the difficulty in diagnosis. Anti-Müllerian hormone(AMH) is a kind of reproductive hormone closely related to sex development. At present, AMH is widely used to evaluate ovarian reserve and to assist in the field of reproduction. AMH takes part in the process of sex development regulated by hypothalamic-pituitary-gonadal axis, and the change of AMH level may indicate the occurrence of diseases associated with sex development in children. This review will focus on the clinical application of AMH in precocious puberty, delayed puberty and disorders of sex development.

Objective:To investigate the anatomy and therapeutic effecton skin soft tissue defect at the great toe of perforator flap from distal deep branch of medial plantar artery.Methods:The arteries of one adult foot specimens were filled with red latex and vascular anatomy was performed. Branch distribution and anastomosis of medial plantar artery and dorsal foot artery were observed. The clinical data of 12 patients with skin soft tissue defect at the great toe repaired by retrograde perforator flap from distal deepbranch of medial plantar artery from September 2016 to September 2019 in Affiliated Hospital of Zunyi Medical University was selected, and the donor sites were repaired with skin grafts. The flap survival and complications were observed.Results:Anatomy result demonstrated that deep branch of the medial plantar artery was direct continuation of the medial plantar artery. It traveled along between short toe flexor muscle and abductor hallucis muscle, and gave out several perforators. The proximal perforators passed through the abductor hallucis muscle, and anastomosed with superficial branch of medial plantar artery, anterior medial malleolus artery, and medial tarsal artery. Three perforators were issued at the proximal end of the first metatarsophalangeal joint, namely articular perforator, cutaneous perforator, and communication branch. The cutaneous perforator was main blood supply source for perforator flap from distal deep branch of medial plantar artery.A total of 12 skin flaps were harvested from 12 patients, with an area from 4.5 cm×3.0 cm to 9.0 cm×6.0 cm. Postsurgery dark purple and a few blisters occurred in three flaps, and the sutures at the pedicle were immediately removed, and the flap was coated with antibiotic ointment to keep it moist, then the flap color gradually improved after postsurgery 5 days.12 skin flaps eventually survived completely. All patients were followed up by telephone for 2-12 months. The flap color, texture and appearance were excellent. The traumatic feet walked normally.Conclusions:The perforator flap from distal deep branch of medial plantar artery has reliable blood supply for retrograde repairing small and medium skin defect at the great toe of distal the first metatarsophalangeal joint, with simple operation, less trauma, and positive postoperative effect.

Objective:To investigate the anatomy and therapeutic effecton skin soft tissue defect at the great toe of perforator flap from distal deep branch of medial plantar artery.Methods:The arteries of one adult foot specimens were filled with red latex and vascular anatomy was performed. Branch distribution and anastomosis of medial plantar artery and dorsal foot artery were observed. The clinical data of 12 patients with skin soft tissue defect at the great toe repaired by retrograde perforator flap from distal deepbranch of medial plantar artery from September 2016 to September 2019 in Affiliated Hospital of Zunyi Medical University was selected, and the donor sites were repaired with skin grafts. The flap survival and complications were observed.Results:Anatomy result demonstrated that deep branch of the medial plantar artery was direct continuation of the medial plantar artery. It traveled along between short toe flexor muscle and abductor hallucis muscle, and gave out several perforators. The proximal perforators passed through the abductor hallucis muscle, and anastomosed with superficial branch of medial plantar artery, anterior medial malleolus artery, and medial tarsal artery. Three perforators were issued at the proximal end of the first metatarsophalangeal joint, namely articular perforator, cutaneous perforator, and communication branch. The cutaneous perforator was main blood supply source for perforator flap from distal deep branch of medial plantar artery.A total of 12 skin flaps were harvested from 12 patients, with an area from 4.5 cm×3.0 cm to 9.0 cm×6.0 cm. Postsurgery dark purple and a few blisters occurred in three flaps, and the sutures at the pedicle were immediately removed, and the flap was coated with antibiotic ointment to keep it moist, then the flap color gradually improved after postsurgery 5 days.12 skin flaps eventually survived completely. All patients were followed up by telephone for 2-12 months. The flap color, texture and appearance were excellent. The traumatic feet walked normally.Conclusions:The perforator flap from distal deep branch of medial plantar artery has reliable blood supply for retrograde repairing small and medium skin defect at the great toe of distal the first metatarsophalangeal joint, with simple operation, less trauma, and positive postoperative effect.

ObjectiveTo investigate the correlation of serum 25-hydroxy vitamin D［25(OH)D］ level with the severity of infantile cholestatic hepatopathy (ICH). MethodsA total of 121 infants with ICH who were admitted or referred to Liver Research Center in our hospital from July 2015 to December 2017 were enrolled, and according to the presence or absence of liver cirrhosis, these infants were divided into liver cirrhosis group with 26 infants and non-liver cirrhosis group with 95 infants. The two groups were compared in terms of age, sex ratio, 25(OH)D, liver function parameters ［total bilirubin (TBil), direct bilirubin (DBil), total protein (TP), albumin (Alb), alanine aminotransferase (ALT), aspartate aminotransferase (AST), gamma-glutamyl transpeptidase (GGT), alkaline phosphatase (ALP), total bile acid (TBA), and prothrombin time (PT)］, serological markers of liver fibrosis ［procollagen Ⅲ peptide (PⅢNP), laminin (LN), hyaluronic acid (HA), and type Ⅳ collagen (C-Ⅳ)］, and indices associated with vitamin D metabolism (Ca and P). The independent samples t-test or the Mann-Whitney U test was used for comparison of continuous data between two groups, and the chi-square test was used for comparison of categorical data between two groups. A binary logistic regression analysis was used to investigate the factors associated with the development of liver cirrhosis. ResultsOf all 121 infants, 107 (88.43%) had vitamin D deficiency, and all 26 infants with liver cirrhosis had vitamin D deficiency. Compared with the non-liver cirrhosis group, the liver cirrhosis group had significant reductions in the serum levels of 25(OH)D and Alb (Z=3.029, t=2.294, P＜0.05) and significant increases in the levels of DBil, AST, GGT, HA, and C-Ⅳ(Z=3.032, 2.026, 3.439, 3.143, and 2.247, P＜0.05), while there were no significant differences in the other indices between the two groups (all P＞0.05). The multivariate logistic regression analysis showed that 25(OH)D (odds ratio ［OR］=0.865, 95% confidence interval ［CI］: 0.755-0.922, P=0.038), GGT(OR=1.002, 95%CI: 1.000-1.004, P=0.039), and HA (OR=1.004, 95%CI: 1.000-1.008, P=0.034) were associated with liver cirrhosis in infants with ICH. ConclusionSerum 25(OH)D has a certain clinical value in predicting the severity of hepatocyte damage and the development of early liver cirrhosis in infants with ICH.

Objective: To explore the clinical value of determining heparin-binding protein(HBP) of cerebrospinal fluid(CSF) in the diagnosis and prognostic prediction in children with purulent meningitis(PM). Methods: 76 children with PM, 55 children with viral encephalitis(VE) and 40 control children with non-infectious diseases, all admitted to Hunan Children′ Hospital from August 2018 to January 2019, were enrolled in this retrospective study. Children with PM were divided into favorable prognosis group and poor prognosis group according to the Glasgow Outcome Scale on discharge. CSF HBP, white blood cell count(WBC), percentage of neutrophilic granulocyte(N%), glucose(Glu), total protein(TP), lactic dehydrogenase (LDH) and serum procalcitonin(PCT) were analyzed on the first day of admission(DAY1) in PM group, VE group and control group, and on the seventh day of admission(DAY7) in PM group. Nonparametric tests were used to detect the differences of the laboratory indexes and Spearman rank correlation test was utilized to analyze the correlation between HBP and other markers. Receiver operating characteristic curves (ROC curves) were established to evaluate the values of the detection indexes in the diagnosis and prognosis of PM. Results: The differences of CSF HBP[63.09(18.10-272.19)ng/mL, 5.90(5.90-6.40)ng/mL and 5.90(5.90-5.90)ng/mL], WBC[365.00(20.00-1285.00)×10⁶/L, 21.00(8.00-30.00)×10⁶/L and 13.50(7.25-21.00)×10⁶/L], N%[0.65(0.50-0.79), 0.19(0.10-0.25) and 0.21(0.15-0.27)], Glu[1.97(1.07-3.08)mmol/L, 2.89(2.66-3.42)mmol/L and 3.04(2.68-3.42)mmol/L], TP[1.43(0.63-1.88)g/L, 0.23(0.16-0.32)g/L and 0.13(0.10-0.31)g/L], LDH[152.00(46.50-461.50)IU/L, 16.00(13.20-22.00)IU/L and 16.00(10.25-19.75) IU/L] and serum PCT[1.35(0.19-9.33)ng/mL, 0.06(0.03-0.11)ng/mL and 0.08(0.05-0.14)ng/mL] levels on DAY1 were statistically significant among PM group, VE group and control group(H_HBP=138.62, H_WBC=69.72, H_N%=106.67, H_Glu=34.08, H_TP=68.00, H_LDH=85.11, H_PCT=79.20, P<0.001). HBP had the largest area under curve(AUC=0.997) for the diagnosis of PM, and had excellent sensitivity, specificity, positive predictive value, negative predictive value (98.70%, 97.90%, 97.40%, 98.94%, respectively) at the optimal cut-off value (11.84 ng/mL). Compared with DAY1,CSF HBP, WBC, N%, TP, LDH and serum PCT levels on DAY7 were statistically lower in favorable prognosis group(P<0.05). The differences for all the indexes between DAY1 and DAY7 in poor prognosis group were not statistically significant, however. It was not significant for all the indexes on DAY1 to predict poor prognosis(P>0.05). But the indexes on DAY7 for predicting poor prognosis were significant (P<0.05) and HBP still had the largest AUC (0.976) for predicting the poor prognosis with good sensitivity, specificity, positive predictive value, negative predictive value (100.0%, 93.8%, 76.3%, 100.0%, respectively) at the optimal cut-off value(128.84 ng/mL). CSF HBP was positively correlated to CSF WBC, N%, TP, LDH, serum PCT level(r_WBC=0.670, r_N%=0.802, r_TP=0.562, r_LDH=0.524, r_PCT=0.436, P<0.001) and negatively correlated to CSF Glu level(r=-0.469, P<0.001). Conclusions CSF HBP is valuable in the diagnosis and prognostic prediction in children with purulent meningitis.

Objective To study the change and clinical value of thrombomodulin (TM ) in children with se-vere pneumonia .Methods Sixty-five children cases of severe pneumonia were divided into the disseminated in-travascular coagulation (DIC) group and non-DIC group according to whether complicating DIC .And 30 healthy children were selected as the control group .Plasma TM levels were analysed and compared among the three groups .The receiver operating characteristic(ROC) curve was used to conduct the evaluation .Results The plasma TM level had statistically significant difference among the control group ,non-DIC group and DIC group(H=53 .14 ,P=0 .000) ,moreover the pairwise comparison also had statistical difference (P<0 .05) .A-mong sputum culture positive 24 cases of severe pneumonia complicating DIC ,the T M level had no statistical difference between the children patients with Gram-positive bacterial infection and children patients with Gram-negative bacterial infection(P>0 .05) .The area under ROC curve of TM for diagnosing DIC was 0 .74 . The sensitivity ,specificity ,positive likelihood ratio and negative likelihood ratio were 0 .76 ,0 .63 ,2 .05 and 0 .38 respectively .Conclusion The change of plasma TM level is associated with the severity of children with severe pneumonia ,and T M can be used as one of the reference indicators for the early diagnosis in children with severe pneumonia complicating DIC .

Objective To investigate the level of 25-hydroxyvitamin D[25(OH)D]and relationship to C-reactive protein(CRP) and procalcitonin(PCT)in children with severe pneumonia.Methods Serum 25 (OH)D levels of 86 cases of children with severe pneumonia,81 cases of children with mild pneumonia and 85 cases of children in healthy control group on admission were deter-mined by ELISA respectively and compared.At the same time,CRP and PCT were tested and the correlation to 25(OH)D in chil-dren with severe pneumonia was analyzed.Results There are statistical differences among three groups(P <0.05,α=0.05 ).The mean values of serum 25 (OH)D were (62.03 ±17.94),(68.90 ±15.22)and (82.21 ±17.89)μmol/L in severe pneumonia pa-tients,mild pneumonia patients and healthy children respectively,furthermore,prevalence of vitamin D deficiency of the sever pneu-monia group was significantly higher than that of the case-control group and normal group (P < 0.05,α= 0.05 ).The level of 25(OH)D was not significantly related to CRP and PCT level in children with severe pneumonia(P <0.05,α=0.05).Conclusion The mean level of vitamin D in children with severe pneumonia was significantly lower,which may be associated with the occurrence and develop-ment of severe pneumonia in children.