Objective To evaluate the microstructural integrity of white matter (WM) in patients with amnestic mild cognitive impairment (aMCI) and mild Alzheimer's disease (AD) using voxel-based analysis (VBA), and investigate the relationship between WM abnormalities and gray matter(GM) atrophy.Methods Thirty-three cases with aMCI, 32 cases with mild AD and 31 normal aging volunteers as control subjects were scanned on a 3.0 T MR system using diffusion tensor imaging (DTI) and three-dimensional spoiled gradient-recalled(3DSPGR) sequences. Fractional anisotropy (FA) maps and morphological images were preprocessed by SPM5 and voxel-based comparisons between the 2 patient groups and the control group were performed by t test. Results Relative to the control group, patients with aMCI showed significantly reduced FA value in bilateral frontal, temporal and left occipital WM, left anterior part of cingulum, left inferior parietal lobule, and the W M adjacent to the triangular part of the right lateral ventricle(k≥20 voxels).In mild AD,significantly reduced FA value was found in bilateral hippocampal,inferior parietal lobular,frontal,temporal,and occipital WM,bilateral corpus callosum,anterior part of cingulums,the WM adjacent to the triaangular part of the bilateral lateral ventricles,left temporal stem,left thalamus,right precuneus(k≥20 voxels).Significantly reduced GM volume was found in left hippocampus,parahippocampal gyrus,lingual gyrus and superior temporal gyrus,bilateral insulae and middle temporal gyri in aMCl group whencompared with control group(k≥50 voxels).In mild AD,significantly reduced GM volume was found in bilateral hippoeampi,parahippocampal gyri,amygdalae,thalami,temporal,parietal,frontal,occipital cortex(k≥50 voxels).The pattern of areas with reduced FA differs;from that of the GM volumetric reduction.No areas with significantlv reduced FA was detected in aMCl compared with mild AD. There was no significant correlation between FA value of WM in patient groups and Mini-Mental State Examination(MMSE)scores.Conclusions Voxel-based MRI DTI analysis of whole brain white matter can objectively reveal widespread white matter abnormalities in early-stage AD.The difierence between WM FA reduction pattern and GM volumetric reduction pattern indicates that the pathological WM changes in earlyslage AD were caused by multiple mechanisms. FA did not vary significantly in patients pr0gressing from aMCI to mild AD and can hardly reflect the severitv of cognitive function damage in these patients.

Objective To investigate compliance of breast cancer patients with postoperative peripherally inserted central catheter (PICC) in terms of upper limb motion, to formulate practical plan of upper limb motion, and to improve the compliance in the patients with PICC catheter.Methods A total of 75 patients after breast cancer operation with PICC for chemotherapy were selected from Department of Thyroid and Breast Surgery for upper limb activity instructions.Plan-Do-Check-Act method was used to evaluate the feasibility and effectiveness.Two cycles were performed in two weeks.Patients' compliance was assessed by the inquiry method.Results After practicing and refining nursing process, perfecting the risk assessment table, adjusting the education time, etc., the cognition and acceptance of the significance of upper limb motion were improved in the patients.The compliance of the patients to the upper limb motion instructions was satisfactory.Conclusions The upper limb motion scheme in this study was modified and perfected through application, research, and practice.This scheme could enhance the compliance of patients in terms of upper limb motion.

Objective To compare the efficacies and prognoses of stereotactic radiosurgery and fractionated stereotactic radiosurgery in treatment of brain metastases of lung cancer with diameter of 3-7 cm.Methods A retrospective study of 80 patients with brain metastases from lung cancer with diameter of 3-7 cm treated with gamma knife in our hospital from April 2010 to November 2016 was performed.There were 46 patients in stereotactic radiosurgery group and 34 in fractionated stereotactic radiosurgery group.The local tumor rate,incidence of complications,changes ofperitumoral edema,and Kamofsky Performance Status (KPS) scale scores at 3 months after operation were compared between the two groups.Multi-factor Cox regression model was used to analyze the factors influencing the short-term efficacy of patients.Kaplan-Meier survival analysis was used to evaluate the survival rate of patients.Results Three months after operation,the local tumor control rate and incidence of complications were 73.9％ and 21.7％ in the stereotactic radiosurgery group,and 94.1％ and 2.94％ in the fractionated stereotactic radiosurgery group,with significant differences (P＜0.05).As compared with those in the stereotactic radiosurgery group,the percentage of patients with increased grading ofperitumoral edema was significantly decreased and percentage of patients with increased KPS scores was significantly increased in fractionated stereotactic radiosurgery group (P＜0.05).Multivariate Cox analysis showed that tumor diameter was the only statistically significant risk factor for prognosis (P＜0.05).The median survival time was 13.6 months in the stereotactic radiosurgery group and 16 months in the fractionated stereotactic radiosurgery group.The one-year survival rate and accumulate survival rate showed no significant differences between the two groups (P＞0.05).Conclusion As compared with stereotactic radiosurgery therapy,fractionated stereotactic radiosurgery has more advantages in the treatment of lung cancer brain metastases with diameter of 3-7 cm.

Objective:To systematically evaluate the methodology and reporting quality of colorectal cancer (CRC) screening guidelines/consensus and provide lights for drafting CRC screening guidelines in China.Methods:The literature retrieval for all the Chinese and English guidelines published before September 1 st, 2020 was conducted by using Chinese/English databases, such as China National Knowledge Infrastructure, Wanfang Data, VIP, SinoMed, PubMed, Embase, Web of Science, Cochrane Library, Guideline International Network, and supplement with the official website of multiple regions, such as the U.S. Preventive Services Task Force and American Cancer Society. We utilized The Appraisal of Guidelines for Research & Evaluation Ⅱ (AGREE Ⅱ) and Reporting Items for Practice Guidelines in Healthcare (RIGHT) approaches to assess the quality of CRC screening guidelines/consensus comprehensively. Results:After quality control, a total of 19 guidelines/consensus released by the United States, China, Australia, Canada, Britain, South Korea, and International organizations are successfully included, and strikingly, most of those belong to the United State(7). The results of the AGREE Ⅱ quality evaluation show that the average scores of scope and purpose (87.5%) and clarity of presentation (89.6%) are high. In contrast, there are deficient in stakeholder involvement (47.0%), the rigor of development (42.3%), applicability (47.5%), and editorial independence (50.2%). Among all the guidelines, there are 12 with an overall score of 50 or more, 13 with a recommendation level of "A", 2 with a rating of "B" and 4 with a rating of "C". Additionally, the RIGHT evaluation revealed that the average report rate in each field is necessary information (76.3%), background (77.0%), evidence (55.8%), recommendations (59.4%), review and quality assurance (26.3%), funding and declaration and management of interests (43.4%), other information (49.1%). Among all the guidelines, six have good reporting quality, whereas the additional 13 have general or weak evidence. Furthermore, subgroup analysis indicates that the quality of guidelines in developed countries is superior to that of China.Conclusion:The number of CRC screening guidelines/consensus is increasing gradually, and the overall quality of those is high, but the normative nature is warranted to be strengthened.

Objective To investigate the status and influencing factors of pressuring feeding style a-mong caregivers in remote rural areas of Sichuan province.Methods Multistage sampling was conducted to select infants of 6-11 months old who had received complementary food and their caregivers in remote rural areas of Si-chuan province.A questionnaire was used to collect sociodemographic characteristics of infants and their caregivers,pressuring feeding behaviors,feeding environment,and caregivers'negative emotions.Quantile regression was em-ployed to analyze the factors influencing pressuring feeding among caregivers of infants.Results A total of 1358 pairs of infants and their caregivers were included,with the pressuring feeding behavior score of 11(8,14).Parity was the protective factor for caregivers'pressuring feeding(β25=-1.17,P＜0.001;β50=-1.40,P=0.002;β75=-2.18,P＜0.001).Whether infants played with toys while eating(β25=1.00,P＜0.001;β50=1.20,P=0.003;β75=1.42,P＜0.001)and whether infants watched TV/mobile phones(β25=0.50,P=0.048;β50=1.07,P=0.004)were the risk factors.At the 75th percentile,caregivers'negative emotions were the risk factor for pressuring feeding(β75=0.94,P=0.015).Caregivers'education background(β25=0.83,P=0.034;β50=0.87,P=0.021)and family income(β75=1.09,P=0.012)were also significantly associated with pressuring feeding scores at different quartile points.Conclusions Pressuring feeding behaviors of caregivers in remote rural areas of Sichuan province need to be improved.Based on the characteristics of infants and their families,guidance should be carried out to improve the feeding environment and the mental health of caregivers,thereby promoting reasonable feeding behaviors among caregivers of infants in rural areas.

Objective To investigate the current status of physical activity and depressive symptoms a-mong middle-aged and older adults in Chengdu,Sichuan and explore the relationship between physical activity and depressive symptoms.Methods Multi-stage proportional stratified random sampling was employed to select middle-aged and older adults aged ≥45 years as the participants,and face-to-face interviews were carried out to collect data.Logistic regression was adopted to explore the relationship between physical activity and depressive symptoms in middle-aged and older adults.The trend test was performed for the relationship between different lev-els of physical activity and depressive symptoms.The subgroup analysis and the test for multiplicative interactions were conducted for the relationship between physical activity and depressive symptoms.Results A total of 4376 middle-aged and older adults were included.Among them,14.58％(638/4376),25.98％(1137/4376),and 27.83％(1218/4376)had depressive symptoms,failed to reach the guideline-recommended standards of physical activity,and were at low levels of physical activity,respectively.There was a negative association be-tween reaching guideline-recommended physical activity standard and depressive symptoms in middle-aged and ol-der adults(OR=0.713,95％CI=0.589-0.861,P＜0.001).In addition,moderate levels(OR=0.714,95％CI=0.586-0.871,P=0.001)and high levels of physical activity(OR=0.705,95％CI=0.548-0.906,P=0.006)had negative associations with the presence of depressive symptoms.The trend test revealed that the negative association between physical activity and depressive symptoms in middle-aged and older adults enhanced as the level of physical activity increased(Pfor trend=0.001).The subgroup analysis and the test for multiplicative interactions revealed that neither reaching guideline-recommended physical activity standards or not nor the physi-cal activity level had an interaction with each of the subgroups(all Pfor interaction＞0.05).Conclusions The current status of depressive symptoms among middle-aged and older adults in Chengdu,Sichuan needs to be ameliora-ted.A negative association existed between reaching the guideline-recommended physical activity standard and pres-ence of depressive symptoms,and the negative association enhanced as the physical activity level elevated.

Objective To investigate the influence of portal hypertension (PHT) on the postoperative complications after hepatectomy for patients with hepatocellular carcinoma (HCC). Methods Clinical data of 152 HCC patients undergoing hepatectomy in Sun Yat-sen University Cancer Center from March 2003 to October 2005 were retrospectively analyzed. The patients were divided into the PHT and non-PHT groups. There were 76 patients in the PHT group including 62 males and 14 females, with a mean age of (49±11) years. There were 76 patients in the non-PHT group including 66 males and 10 females, with a mean age of (49±12) years. The informed consents of all patients were obtained and the local ethical committee approval had been received. After hospitalization, all patients received routine examination. The incidence of postoperative complications in two groups was observed and the independent risk factors for postoperative complications were evaluated. Normally distributed data were compared using t test. Non-normally distributed data were compared using Z test. The comparison of rate was conducted using Chi-square test. Independent risk factors for the incidence of postoperative complications were analyzed by Logistic multivariate regression test. Results The incidence of postoperative complications was 42%(32/76) and the liver function-related complications was 36% (27/76) in the PHT group, and were 20% (15/76), 16% (12/76) respectively in the non-PHT group, significant difference was observed between two groups (χ2=8.901, 7.760;P<0.05). No signiifcant difference was observed in the percentage of patients with grade I-II complications between PHT group [75%(24/32)] and non-PHT group [73%(11/15)] (χ2=0.015, P>0.05). No significant difference was observed in the 90-day mortality between PHT group [7%(5/76)] and non-PHT group [3%(2/76)] (χ2=0.599, P>0.05). Logistic regression analysis revealed that PHT complication (OR=3.376, 95%CI:1.564-7.287, P<0.05) and number of tumors>2 (OR=1.984, 95%CI:1.248-3.154, P<0.05) were the independent risk factors for postoperative complications. PHT complication (OR=3.231, 95%CI:1.431-7.298, P<0.05), number of tumors>2 (OR=1.832, 95%CI:1.137-2.952, P<0.05) and intraoperative transfusion > 400 ml (OR=2.776, 95%CI: 1.123-6.864, P<0.05) were the independent risk factors for liver function-related complications. Conclusions PHT can increase the incidences of postoperative complications and liver function-related complications after hepatectomy in HCC patients and is the independent risk factor for both complications. However, PHT will not increase the severity of postoperative complications or postoperative mortality.

Objective:To evaluate the quality of the published breast cancer screening guidelines to provide a reference for domestic studies in the future.Methods:PubMed, Embase, Cochrane Library, Web of Science, SinoMed, China National Knowledge Infrastructure, VIP, and Wanfang Data were searched to identify breast cancer screening guidelines on until August 2020. Two reviewers screened literature and extracted data independently. The Appraisal of Guidelines for Research & Evaluation Ⅱ(AGREEⅡ) and Reporting Items for Practice Guidelines in Healthcare(RIGHT) tools were used to evaluate the quality of the included guidelines.Results:A total of 15 breast cancer screening guidelines were included, of which seven were published in the United States, with publication years focusing on 2015 to 2019, and 11 guidelines had updated versions. "Rigour of development" (47.0%±22.1%) and "Applicability" (44.0%±15.1%) of AGREEⅡ scored lower than other domains. "Review and quality assurance" (46.7%±39.9%) and "Funding, declaration, and management of interests" (41.7%±24.4%) of RIGHT were reported poorer than others. There were six guidelines recommended and another nine recommended with modifications based on the overall AGREEⅡ score. There were four guidelines with a good level, and another 11 were with a moderate level of RIGHT. The National Comprehensive Cancer Network published the best overall quality guidelines in 2018 (AGREEⅡ: 83.3%, RIGHT: 80.0%) and by the American Cancer Society in 2015 (AGREEⅡ: 83.3%, RIGHT: 85.7%).Conclusion:The quality of breast cancer screening guidelines was predominantly of moderate quality, and greater attention should be paid to the guideline development process and quality control of the guidelines.

Objective:To investigate the relationship between metabolic syndrome (MS) and the risk of breast cancer in Chinese females.Methods:From May 2006 to December 2015, based on the Kailuan Women′s Dynamic Cohort,a total of 25 618 female employees and retirees of the Kailuan Group were included and followed. Questionnaire surveys, physical measurements and laboratory tests were used to collect baseline sociodemographic characteristics, height, weight, blood glucose, blood lipids, blood pressure, tumor incidence and outcome information. Cox proportional hazards regression models were used to analyze the relationship between MS and its components (body mass index, blood pressure, blood glucose and blood lipid) and the risk of breast cancer in females.Results:The age of 25 618 women was (47.65±12.02) years old and median follow-up time was 8.78 years; 235 new cases of breast cancer were detected, and the incidence density was 113.19/100 000 person-years. After adjusting for age, education, income, smoking status, drinking status and other factors, people who were overweight or obese had a higher risk of breast cancer, with HR (95% CI) about 1.47 (1.12-1.93), than those with normal body mass index. Compared with those without MS abnormal components, women with two MS abnormal components had an increased risk of breast cancer ( HR=1.70, 95% CI: 1.16-2.50). With the increase of the number of MS abnormal components, the risk of breast cancer increased gradually ( Ptrend value<0.05). Conclusion:Overweight/obesity and the number of abnormal components of MS can increase the risk of breast cancer in women.

Background::Non-smokers account for a large proportion of lung cancer patients, especially in Asia, but the attention paid to them is limited compared with smokers. In non-smokers, males display a risk for lung cancer incidence distinct from the females—even after excluding the influence of smoking; but the knowledge regarding the factors causing the difference is sparse. Based on a large multicenter prospective cancer screening cohort in China, we aimed to elucidate the interpretable sex differences caused by known factors and provide clues for primary and secondary prevention.Methods::Risk factors including demographic characteristics, lifestyle factors, family history of cancer, and baseline comorbidity were obtained from 796,283 Chinese non-smoking participants by the baseline risk assessment completed in 2013 to 2018. Cox regression analysis was performed to assess the sex difference in the risk of lung cancer, and the hazard ratios (HRs) that were adjusted for different known factors were calculated and compared to determine the proportion of excess risk and to explain the existing risk factors.Results::With a median follow-up of 4.80 years, 3351 subjects who were diagnosed with lung cancer were selected in the analysis. The lung cancer risk of males was significantly higher than that of females; the HRs in all male non-smokers were 1.29 (95% confidence interval [CI]: 1.20-1.38) after adjusting for the age and 1.38 (95% CI: 1.28-1.50) after adjusting for all factors, which suggested that known factors could not explain the sex difference in the risk of lung cancer in non-smokers. Known factors were 7% (|1.29-1.38|/1.29) more harmful in women than in men. For adenocarcinoma, women showed excess risk higher than men, contrary to squamous cell carcinoma; after adjusting for all factors, 47% ([1.30-1.16]/[1.30-1]) and 4% ([7.02-6.75]/[7.02-1])) of the excess risk was explainable in adenocarcinoma and squamous cell carcinoma. The main causes of gender differences in lung cancer risk were lifestyle factors, baseline comorbidity, and family history.Conclusions::Significant gender differences in the risk of lung cancer were discovered in China non-smokers. Existing risk factors did not explain the excess lung cancer risk of all non-smoking men, and the internal causes for the excess risk still need to be explored; most known risk factors were more harmful to non-smoking women; further exploring the causes of the sex difference would help to improve the prevention and screening programs and protect the non-smoking males from lung cancers.