Objective: To investigate the lunch supply in primary and middle school dining rooms in Ningbo City, so as to provide the scientific evidence for guiding rational dietary supply and improving student health. Methods: A primary school and a junior high school were randomly sampled from each of 10 counties (districts) in Ningbo City. Food receipt and balance, dinner supply and number of students with meals were collected from school dining rooms with questionnaires formulated by Zhejiang Provincial Center for Disease Control and Prevention, and all foods in school dining rooms provided by enterprises were sorted and recorded. Daily mean lunch food, energy and nutrient supply was calculated per student, and evaluated with the Student Electronic Nutritionist platform, the 2013 revision of Chinese Dietary Reference Intakes and the national criteria of Nutrition Guidelines of Student Meals (WS/T 554-2017). Results: Six urban primary schools, six urban junior high schools, four rural primary schools and four rural junior high schools were enrolled, and there were two schools with meals provided by enterprises and eighteen schools with meals provided by their dining rooms. Appropriate supply of cereals and potatoes, excessive supply of livestock and poultry meat, vegetable oil and salt, and low supply of fruits, eggs, milk and soybean and nuts were found in primary and junior high school, and notably, milk and fruits were not provided by any rural junior high schools. Excessive energy supply was found in primary schools (excessive energy supply in rural primary schools and appropriate in urban primary schools), and appropriate energy supply was seen in junior high schools. High energy ratios of protein and fat, low energy ratio of carbohydrate, low supply of diatery fiber, vitamin A and calcium, appropriate supply of vitamin B1, B2 and C, and sufficient supply of iron and zinc were found in primary and junior high school. Conclusion Unreasonable dietary structure, excessive energy supply and nutrient imbalance are found in lunch supply by primary and junior high schools in Ningbo City.

Objective To investigate lymph node metastases in distal gastric cancer and its clinical significance. Methods From June 2006 to December 2007, 129 distal gastric cancer patients underwent radical gastrectomy with lymphadenectomy. Dissected lymph nodes were collected in groups, and histopathological studies were performed to detect lymph node metastasis. The relationship between lymph node metastasis and tumor parameters such as diameter, location, infiltrating depth, histological category,Borrmann typing was evaluated. Results Lymph node metastases was found in 80 out of 129 patients (62%). A total of 3295 lymph nodes were harvested with an average of 25.54 lymph nodes per patient,among those 889 lymph nodes were identified with metastasis. The metastasis rate was 18.60%, 48. 84%,37. 98%, 38. 76%, 44. 19%, 31.01%, 10. 85%, 14. 73%, 4. 65%, 1.55% and 0. 78% respectively in No. 1, No. 3, No. 4d, No. 5, No. 6, No. 7, No. 8a, No. 9, No. 11 p, No. 12a, No. 14v lymph node group.No. 3 and No. 6 group nodes were moat frequently invaded by metastasis. Conclusion This study provides the regular pattern of lymph node metastasis in distal gastric carcinoma patients undergoing radical gastrectomy and perigastric lymphadectomy which helps to guide lymphadectomy in terms of less trauma and favorite prognosis.

Objective To establish and verify the personalized reference interval of blood cells.Methods The results of blood cells from 2 089 health subjects in 2014,2015 and 2016 were collected.The ratio of the later results to the previous results was defined as the fluctuation (λ).The ratio (λ1) of the results of 2015 to the results of 2014 was calculated and λ1 was analyzed statistically to establish the fluctuation reference interval (CIλ).The ratio (λ2) of the results of 2016 to the results of 2015 was calculated.λ2 was used to verify λ2.The personalized reference interval (CIp) was established by multiplying each result of 2015 and CIλ.CIp was verified by results of 2016.The ratio of the upper and lower limits of CIp was calculated.The ratio of the upper and lower limits of the reference interval (WS/T 405) was calculated.Results The values of CIλ were as follows:WBC (0.66 to 1.53),L(0.67 to 1.51),M (0.50 to 2.00),N(0.56 to 1.78),E(0.4 to 2.51),PLT(0.76 to 1.32),RBC(0.92 to 1.12),Hb(0.92 to 1.11),Hct(0.91 to 1.12),MCV(0.95 to 1.07),MCH(0.95 to 1.05)and MCHC(0.94 to 1.06).The validation tests of CIλ and CIp showed that both CIλ and CIp were suitable for this laboratory.Compared with the reference interval of professional criteria,the ratio of the upper and lower limits of the CIp was smaller than that of traditional criteria.Conclusion CIp for this laboratory was established and verified.Compared with traditional criteria,CIp should be more personalized and highly sensitive.

Objective: To analyze the epidemiological and pathogenic characteristics of foodborne diseases among students in Ningbo from 2014 to 2021, so as to provide a scientific basis for the prevention and control of foodborne diseases in schools. Methods: Information on foodborne disease cases among students attending all surveillance hospitals in Ningbo from 2014 to 2021 was collected from the Foodborne Disease Surveillance System of Zhejiang Province, and epidemiological characteristics and pathogenic analysis were analyzed. Results: A total of 3 602 cases of foodborne diseases in the student population were reported in Ningbo, of which 54.58% were males and 45.42% were females. Students aged 18 years and above accounted for the highest incidence group, and the incidence time mainly showed two peaks in May to June and September to October. Meat and meat products accounted for the largest proportion of suspicious foods (21.11%), and the positive pathogen detection rates were 11.20% for Norovirus, 3.30% for Vibrio parahaemolyticus, 1.77% for Salmonella, 1.30% for diarrheogenic Escherichia coli and 0.18% for Shigella. Conclusion The main suspect foods for foodborne diseases among students in Ningbo are primarily meat and meat products, and the main etiological agent is norovirus, which requires strengthening food safety health education and food safety management.

Objective: To analyze the situation and associated factors of school lunch leftovers of primary and middle school students in Ningbo, so as to provide a basis for formulating policies to improve the quality of nutritious meals and reduce the leftover meal rates. Methods: During March to May of 2022, 20 primary and middle schools were selected from 10 districts in Ningbo, and 4 443 students were selected from grade 4 to 6 of primary school and grade 1 to 3 of middle school. A questionnaire was conducted among them for the students general situation and remaining meal situation. Results: The total leftover rate was 62.4%, 7.9% of the students left rice every day, and 18.3% of the students left vegetables every day. The frequency of primary school students leftover food was lower than that of junior high school students ( χ 2=-2.18, P <0.05). Most of the students (68.3%) had only a little leftover food, half of the students (49.4%) had less than half leftovers, and the proportion of primary school students with large leftover food and leftovers was smaller than that of junior high school students ( χ 2=-2.05, -2.36, P <0.05). The main reason for students leftover food was "too much to eat" (accounting for 30.6%), and there was a statistical difference between primary school students and junior high school students in the composition of leftover food and leftovers ( χ 2=16.94, 14.28, P <0.05). The leftover rate of vegetables was the highest (54.5%) and the leftover rate of milk was the lowest (2.5%). Multivariate Logistic regression model showed that nutrition and food related courses during recent year, being aware the Chinese residents dietary guidelines, statisfaction with canteen food (general, more satisfied, very satisfied), reckoning school canteen food better than home food (almost, better than home) were less possibility to have leftover meals ( OR=0.79, 0.73, 0.57, 0.41, 0.26, 0.69, 0.82, P <0.05). Students chosed the meal after the teacher served the meal, the teacher divided meals and students who ate more frequently (4-6 times/week, 1 time/d, 2 times/d, ≥3 times/d) were more likely to have leftover meals ( OR=1.64, 2.23, 1.27, 1.21, 1.52, 1.44 , P < 0.05). Conclusion More than half of the students have leftovers. It should optimize the configuration of nutrition lunch, strengthen the education of nutrition knowledge and reduce the leftovers rate.

Objective To establish and verify the fluctuation of reference intervals for biochestry parameters in routine physical exami-nation. Methods The results of biochemistry parameters,i.e., total protein (TP), albumin (Alb), total bilirubin (T-Bil), alanine aminotransferase (ALT), glucose (Glu), urea (Urea), creatinine (Cr), uric acid (UA), triacylglycerol (TG) and total cholesterol ( TC) from 2 089 healthy subjects in routine physical examination during consecutive 2014, 2015 and 2016 were randomly collected, in which all the results were within the reference range. The ratio (λ1) of the results of 2015 to those of 2014, and ratio (λ2) of the re-sults of 2016 to those of 2015 were calculated. λ1was analyzed statistically to establish the fluctuation of reference interval (CIλ). CIλ was verified by λ2.The personalized reference interval (CIp) was established by multiplying each result of 2015 and the upper and low-er limits of CIλ. The CIpwas verified by the results of 2016. The ratios of CIpto the upper and lower limits of conventional reference in-terval were calculated. Results The values of CIλwere as follows: TP: 0.91 to 1.08, Alb: 0.91 to 1.08, T-Bil: 0.58 to 1.74, ALT:0.49 to 1.99, Glu: 0.84 to 1.20, Urea: 0.67 to 1.50, Cr: 0.82 to 1.22, UA: 0.77 to 1.32, TG: 0.51 to 1.98 and TC: 0.80 to 1.26. Compared with conventional reference interval, the ratio of the upper and lower limits of CIp was lessened. Conclusion The personal-ized reference interval (CIp) which may increase the sensitivity of conventional reference intervals was established and verified.

Objective To strengthen human genetic resource management in clinical trials.Methods This article analyzes the common problems in the process of reviewing human genetic resources application by the drug clinical trial institute in our hospital,and proposes solutions for solving the problems.Results Common questions are also the key points for future review of human genetic resources applications,including the collection of sample and consistency with clinical trial plan,ethical review and informed consent,intellectual property rights etc.Conclusions Strictly reviewing applications of human genetic resources,as well as strengthen the management of human genetic resources in clinical trials,are not only make traceability of human genetic resources traceable,but also have important significance for the authenticity and scientific validity of trial results.

Objective The aim of the study was to explore the influencing factors of exercise tolerance in patients with myocardial infarction (MI) after percutaneous coronary intervention (PCI) revascularization in acute state. Methods A total of 112 patients with first MI undergoing PCI revascularization in acute state and completing cardiopulmonary exercise testing (CPET) were enrolled. Exercise capacity was evaluated by peak oxygen consumption percentage (VO2 peak%) in CPET. Patients were divided into normal exercise capacity (NEC) group (n=40) and abnormal (AEC) group (n=72) according to VO2 peak% value. Clinical manifestations, histories of hypertension and diabetes, medications, coronary arterial angiography and echocardiography findings of patients were compared. The onsets of diabetes and blood glucose levels during the period of CPET were evaluated in the MI patients with diabetes. The patients were followed up for major adverse cardiovascular events (MACE) (admission due to chest pain, re?revascularization, re?infarction and all?cause death) within 24 months after PCI. Multivariate logistic regression analyses were conducted to examine influencing factors for exercise tolerance. Results The ratio of diabetes, type C lesions in the AEC group were higher than those in the NEC group (diabetes: 37.5% vs. 17.5%; type C lesions: 69.4% vs. 42.5%, respectively, all P<0.05). The left ventricular ejection fraction (LVEF) in patients in the AEC group was lower than that in the NEC group [(60.6±10.0) % vs. (65.0±8.2) %, P=0.019]. Multivariate logistic regression analyses showed that history of diabetes and history of type C lesions were the independent risk factors for the declined exercise capacity in the MI patients after PCI revascularization ( OR=3.14, 95%CI 1.167-8.362, P=0.023; OR=3.32, 95%CI 1.444-7.621, P<0.01). Among the MI patients with diabetes, the duration of diabetes in the AEC group was significantly longer than that in the NEC group[ (7.7 ± 3.6)years vs. (5.0 ± 2.4)years] and the proportions of subjects reaching target levels of fasting plasma glucose (40.7% vs. 57.1%) and glycosylated hemoglobin A1c(HbA1c) (55.6% vs. 71.4%) in this group were significantly lower than those in the NEC group (all P<0.05). A multivariate logistic regression analysis showed that reaching HbA1c target was an independent predictor of improved exercise tolerance in MI patients with diabetes who received PCI ( OR=2.518, 95%CI 1.395-7.022, P=0.021). No significant differences were observed in incidence of admission due to chest pain, re?revascularization and re?infarction between the two groups within 24 months after PCI between the groups. Conclusions Diabetes and type C lesions are independent risk factors of declined exercise capacity in patients with first myocardial infarction who received revascularization in acute state. Reaching target HbA1c is independent factor of improved exercise capacity in patients with myocardial infarction and diabetes.

Objective: The aim of the study was to explore the influencing factors of exercise tolerance in patients with myocardial infarction (MI) after percutaneous coronary intervention (PCI) revascularization in acute state. Methods: A total of 112 patients with first MI undergoing PCI revascularization in acute state and completing cardiopulmonary exercise testing (CPET) were enrolled. Exercise capacity was evaluated by peak oxygen consumption percentage (VO_{2 peak}%) in CPET. Patients were divided into normal exercise capacity (NEC) group (n=40) and abnormal (AEC) group (n=72) according to VO_{2 peak}% value. Clinical manifestations, histories of hypertension and diabetes, medications, coronary arterial angiography and echocardiography findings of patients were compared. The onsets of diabetes and blood glucose levels during the period of CPET were evaluated in the MI patients with diabetes. The patients were followed up for major adverse cardiovascular events (MACE) (admission due to chest pain, re-revascularization, re-infarction and all-cause death) within 24 months after PCI. Multivariate logistic regression analyses were conducted to examine influencing factors for exercise tolerance. Results: The ratio of diabetes, type C lesions in the AEC group were higher than those in the NEC group (diabetes: 37.5% vs. 17.5%; type C lesions: 69.4% vs. 42.5%, respectively, all P<0.05). The left ventricular ejection fraction (LVEF) in patients in the AEC group was lower than that in the NEC group [(60.6±10.0)% vs. (65.0±8.2)%, P=0.019]. Multivariate logistic regression analyses showed that history of diabetes and history of type C lesions were the independent risk factors for the declined exercise capacity in the MI patients after PCI revascularization (OR=3.14, 95%CI 1.167-8.362, P=0.023; OR=3.32, 95%CI 1.444-7.621, P<0.01). Among the MI patients with diabetes, the duration of diabetes in the AEC group was significantly longer than that in the NEC group[(7.7±3.6)years vs. (5.0±2.4)years] and the proportions of subjects reaching target levels of fasting plasma glucose (40.7% vs. 57.1%) and glycosylated hemoglobin A1c(HbA1c) (55.6% vs. 71.4%) in this group were significantly lower than those in the NEC group (all P<0.05). A multivariate logistic regression analysis showed that reaching HbA1c target was an independent predictor of improved exercise tolerance in MI patients with diabetes who received PCI (OR=2.518, 95%CI 1.395-7.022, P=0.021). No significant differences were observed in incidence of admission due to chest pain, re-revascularization and re-infarction between the two groups within 24 months after PCI between the groups. Conclusions Diabetes and type C lesions are independent risk factors of declined exercise capacity in patients with first myocardial infarction who received revascularization in acute state. Reaching target HbA1c is independent factor of improved exercise capacity in patients with myocardial infarction and diabetes.

Objective:To explore the epidemiological characteristics and spatiotemporal clustering of foodborne infection of Vibrio ( V.) parahaemolyticus in Ningbo, Zhejiang Province, from 2014 to 2022, and provide reference and evidence for the prevention and control of related diseases. Methods:The incidence data on of foodborne infection of V. parahaemolyticus in Ningbo from 2014 to 2022 were collected from Ningbo Foodborne Disease Surveillance System, and the case counts and the positive rates in different districts (counties, cities) were calculated. Spatial autocorrelation analysis and spatiotemporal scanning analysis were conducted to analyze the spatiotemporal clustering of the diseases. Results:A total of 1 822 cases of foodborne infection of V. parahaemolyticus were reported in Ningbo from 2014 to 2022, with an overall positive rate of 3.78%. Spatial autocorrelation analysis showed that the positive rate of foodborne infection of V. parahaemolyticus in Ningbo was unevenly distributed from 2014 to 2022, Ninghai was a high-high clustering area, while Zhenhai was a high-low clustering area, and Jiangbei was a low-low clustering area. The annual incidence was high during July-September. Spatiotemporal scanning analysis found one class Ⅰ spatiotemporal clustering area and three class Ⅱ spatiotemporal clustering areas, with the class Ⅰ spatiotemporal clustering area being observed in Jiangbei and Zhenhai from 2019 to 2022. Conclusions:Spatiotemporal clustering of foodborne infection of V. parahaemolyticus existed in Ningbo from 2014 to 2022, with an annual high incidence period from July to September. The key areas for the prevention and control of foodborne infection of V. parahaemolyticus are coastal districts (counties, cities) in Ningbo.