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Objective To perform a Meta-analysis on hepatitis B surface antigen (HBsAg)-positive rates among general Chinese population aged 1-59 years.Methods We systemically reviewed the related data (January 2007 to August 2016) published from Chinese National Knowledge Infrastructure (CNKI),VIP,and PubMed.We also assessed the HBsAg-positive rates among general Chinese populations aged 1-59 years,using a random effects regression model with the comprehensive Meta-analysis software 2.2.Results A total of 46 papers were finally included,with a total sample size of 625 053 individuals.Results from the Meta-analysis showed that the overall combined HBsAg-positive rate was 5.7％ (95％CI:4.8％-6.6％) among general Chinese populations aged 1-59 years.When comparing the HBsAg-positive rates in different regions,data showed that the HBsAg-positive rate of was higher in the mid-western areas (6.3％,95％CI:4.9％-8.0％)than in the eastern areas (5.5％,95％CI:4.4％-6.8％).Results showed that HBsAg-positive rates was higher in males (6.1％,95％CI:5.3％-7.0％) than in females (4.8％,95％CI:4.2％-5.5％).As for the HBsAg-positive rates in different time periods,data showed positive rate of 6.3％ (95％CI:5.5％-7.2％)in 2007-2009,5.9％ (95％CI:4.4％-8.0％) in 2010-2012 and 3.5％ (95％CI:2.0％-6.1％) in 2013-2016,respectively.Conclusion The prevalence of hepatitis B virus infection was decreasing between 2007 and 2016 in China,making the country an intermediate endemic area on HBV.
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Objective To grope for an ideal immune strategy in grown-ups via comparison of immunological effects under 4 different vaccination schemes.Methods Study population was selected by stratified random cluster sampling.A total of 4 different vaccination proposals,including Strategy A (3 doses,10 μg,administrated repeatedly into the unilateral deltoid muscle at 0-1-6 months),Strategy B (2 doses,20 μg,administrated into the bilateral deltoid muscles simultaneously),Strategy C (3 doses,10 μ g,administrated repeatedly into the unilateral deltoid muscle at 0-1-2 months) and Strategy D (2 doses,10 μg,administrated to the bilateral deltoid muscles at the same time),were conducted in Liangzhou,Minqin Gulang,and the Tianzhu Tibetan Autonomic county respectively,in Wuwei city,Gansu province.Under 4 different strategies,post-vaccination immunological effectiveness was evaluated when blood samples of participants collected in the eighth months,post-first injection and in the third year,and tested by enzyme-linked immunoassays and electro-chemiluminescence immunoassay.Chi-squared test and Fisher exact test were used to evaluate the immumological differences between the 4 strategies.Wilcoxon's signed rank test and Kruskal-Waillis H test were conducted to compare the differences of the geometric mean titers (GMTs) of antibody against HBV surface antigen (anti-HBs) titers.Results A total of 1 621 eligible participants aged 16 to 60 years old,were recruited for the study.Numbers of administration and gender were testified as the presuming factors for influencing immune effectiveness.The vaccination completion rates were 53.97％ and 79.82％ in Strategy A and C,respectively,and the difference statistically significant (P＜0.05).In the first year,the protective antibody sero-conversion rates (standardization rate) were 89.21％,54.88％,92.11％,and 41.63％,in Strategy A,B,C and D,respectively,and the significant statistically differences emerged (P＜0.05) if Strategy B,C and D were compared with Strategy A (as the gold standard).Over a 3-year follow-up period,the levels of GMTs on protective antibody declined from 179.2 IU/L,51.6 IU/L,277.1 IU/L and 10.1 IU/L to 61.3 IU/L,21.2 IU/L,31.8 IU/L and 6.0 IU/L in Strategy A,B,C and D,respectively,and the differences of declination on GMTs showed statistically significant differences (P＜0.05) when compared within or between the 4 strategies.Conclusion The 0-1-2 months' prophylactic schedules (Strategy C) seemed superior to the others,in terms of effectively inducing the protective antibody,with shorter duration of vaccination,persisting longer immunity and having higher rate of completive vaccination,so is worth to be recommended as a feasible immune programme for adults,especially for migrants from the rural regions.
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Objective To perform a Meta-analysis on hepatitis B surface antigen (HBsAg)-positive rates among general Chinese population aged 1-59 years.Methods We systemically reviewed the related data (January 2007 to August 2016) published from Chinese National Knowledge Infrastructure (CNKI),VIP,and PubMed.We also assessed the HBsAg-positive rates among general Chinese populations aged 1-59 years,using a random effects regression model with the comprehensive Meta-analysis software 2.2.Results A total of 46 papers were finally included,with a total sample size of 625 053 individuals.Results from the Meta-analysis showed that the overall combined HBsAg-positive rate was 5.7％ (95％CI:4.8％-6.6％) among general Chinese populations aged 1-59 years.When comparing the HBsAg-positive rates in different regions,data showed that the HBsAg-positive rate of was higher in the mid-western areas (6.3％,95％CI:4.9％-8.0％)than in the eastern areas (5.5％,95％CI:4.4％-6.8％).Results showed that HBsAg-positive rates was higher in males (6.1％,95％CI:5.3％-7.0％) than in females (4.8％,95％CI:4.2％-5.5％).As for the HBsAg-positive rates in different time periods,data showed positive rate of 6.3％ (95％CI:5.5％-7.2％)in 2007-2009,5.9％ (95％CI:4.4％-8.0％) in 2010-2012 and 3.5％ (95％CI:2.0％-6.1％) in 2013-2016,respectively.Conclusion The prevalence of hepatitis B virus infection was decreasing between 2007 and 2016 in China,making the country an intermediate endemic area on HBV.
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Objective To grope for an ideal immune strategy in grown-ups via comparison of immunological effects under 4 different vaccination schemes.Methods Study population was selected by stratified random cluster sampling.A total of 4 different vaccination proposals,including Strategy A (3 doses,10 μg,administrated repeatedly into the unilateral deltoid muscle at 0-1-6 months),Strategy B (2 doses,20 μg,administrated into the bilateral deltoid muscles simultaneously),Strategy C (3 doses,10 μ g,administrated repeatedly into the unilateral deltoid muscle at 0-1-2 months) and Strategy D (2 doses,10 μg,administrated to the bilateral deltoid muscles at the same time),were conducted in Liangzhou,Minqin Gulang,and the Tianzhu Tibetan Autonomic county respectively,in Wuwei city,Gansu province.Under 4 different strategies,post-vaccination immunological effectiveness was evaluated when blood samples of participants collected in the eighth months,post-first injection and in the third year,and tested by enzyme-linked immunoassays and electro-chemiluminescence immunoassay.Chi-squared test and Fisher exact test were used to evaluate the immumological differences between the 4 strategies.Wilcoxon's signed rank test and Kruskal-Waillis H test were conducted to compare the differences of the geometric mean titers (GMTs) of antibody against HBV surface antigen (anti-HBs) titers.Results A total of 1 621 eligible participants aged 16 to 60 years old,were recruited for the study.Numbers of administration and gender were testified as the presuming factors for influencing immune effectiveness.The vaccination completion rates were 53.97％ and 79.82％ in Strategy A and C,respectively,and the difference statistically significant (P＜0.05).In the first year,the protective antibody sero-conversion rates (standardization rate) were 89.21％,54.88％,92.11％,and 41.63％,in Strategy A,B,C and D,respectively,and the significant statistically differences emerged (P＜0.05) if Strategy B,C and D were compared with Strategy A (as the gold standard).Over a 3-year follow-up period,the levels of GMTs on protective antibody declined from 179.2 IU/L,51.6 IU/L,277.1 IU/L and 10.1 IU/L to 61.3 IU/L,21.2 IU/L,31.8 IU/L and 6.0 IU/L in Strategy A,B,C and D,respectively,and the differences of declination on GMTs showed statistically significant differences (P＜0.05) when compared within or between the 4 strategies.Conclusion The 0-1-2 months' prophylactic schedules (Strategy C) seemed superior to the others,in terms of effectively inducing the protective antibody,with shorter duration of vaccination,persisting longer immunity and having higher rate of completive vaccination,so is worth to be recommended as a feasible immune programme for adults,especially for migrants from the rural regions.
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Objective To investigate the subtype distribution of HIV-1 infection among men having sex with men (MSM) in Xi' an city.Methods 5 ml anti-coagulating blood samples were collected from MSM who had been reported during 2010-2012 in Xi'an.Both gag and env genes were amplified by nested RT-PCR from the extracted RNA and then sequenced.The acquired sequences were compared with international subtype references,and then the genetic distances were calculated and phylogenetic trees were constructed by Mega 5.2.Epidemiological information including sexual behavior characteristics,history of drug use,blood donation,etc.were gathered.Results 168 samples were successfully amplified and sequenced.Results from Phylogenic analysis showed that the gag and env sequences of 165 samples shared the same subtypes,of which 79 (47.0％) were CRF01_AE,74 (44.0％) were CRF07_BC and 12 (7.1％) belonged to subtype B.There were 3 samples with gag and env sequences classified into different subtypes,of which 2 (1.2％) were CRF01_AE/A1,and the other 1 was CRF07_BC/CRF01_AE.Conclusion At least three HIV-1 subtypes including CRF01_AE,CRF07_BC were identified among MSM population in Xi'an city.
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Objective This study was to compare surgical safety and oncologic adequacy of laparoscopy-assisted gastrectomy (LAG) versus open gastrectomy (OG) for advanced gastric cancer.Methods 120 consecutive AGC patients undergoing LAG with D2 lymph node dissection between September 2005 to December 2009 were compared with 120 AGC patients undergoing OG during the same period.In each group,50 underwent distal gastrectomy,70 for total gastrectomy.Results There was no conversion to open surgery in LAG.The operative time was significantly longer in LAG than OG [(307 ± 84) min vs.(203 ± 52) min,t'=11.556,P ＜ 0.01].The estimated blood loss was significantly less in LAG group than OG group [(258 ± 78) ml vs.(318 ± 89) ml,t =5.550,P ＜ 0.01].The number of lymph nodes retrieved was(17 ±11) in LAG,(16 ±10)in OG (t =0.723,P＞0.05).All margins were tumor free in both groups.9 patients had the postoperative complication in LAG,8 patients in OG (P ＞ 0.05).Length of postoperative stay was significantly shorter in LAG than OG [(10.6 + 4.7) vs.(14.3 ± 2.9) days,t' =7.339,P ＜0.01].There was no mortality in both groups.The 5-year recurrence-free survival rate were comparable (47.6％ in LAG vs.42.8％ in OG,x2 =0.577,P ＞ 0.05) between the two groups.Conclusions This study suggested that laparoscopy-assisted gastrectomy is safe and feasible in terms of surgical outcome and oncologic adequacy for advanced gastric cancer.
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Objective To detect the positively selected sites in the surface ( S) gene of hepatitis B viruses ( HBVs) from patients with occult HBV infection and to study the molecular mechanism of occult HBV infection.Methods The sequence of S gene from patients with occult HBV infection and reference strains of eight HBV genotypes ( A through H) were downloaded from GenBank and then alignment analysis were performed by using Clustal W software .Phylogenetic trees were constructed by using MEGA 5.05 soft-ware package.PAML4.7 was used to analyze positively selected sites .Results A total of 1286 HBV se-quences from patients with occult infection were searched in GenBank .One hundred and seventy-four com-plete gene sequences encoding surface S protein were screened after alignment analysis and confirmation , of which 13 sequences with nonsense mutation were removed .The likelihood ratio test showed that for both the 161 remained sequences and the 31 reference sequences , the selection models of M2, M3 and M8 were sig-nificantly better than the neutral models of M0, M1 and M7 (2△lnL<55.12, P<0.001).By using Bayes Empirical Bayes (BEB) analysis, 14 positively selected sites (including codon 3, 8, 40, 45, 46, 47, 49, 68, 126, 127, 164, 184, 207 and 210) were detected in the surface gene of HBVs from patients with occult HBV infection, eight of which were located at the immune epitope of HBsAg .However, only 2 positively se-lected sites were identified in reference sequences .Conclusion The long-lasting persistence of HBV in pa-tients with occult HBV infection might be caused by the adaptive evolution of their surface gene in a form of escape mutant under immune suppressive condition .
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Objective In order to provide information for the health administration and the price authorities to establish the reasonable price,the practical cost of special nursing of the chronic wound be analyzed,and be compared with the present charge,and the deviation be studied.Methods The cost of nursing care for all items was measured,recorded and collected,then calculating the special nursing cost for chronic wound using the method of ladder sharing the project cost.Rusults The true cost on a single special care for chronic wound was (29.42±9.29)yuan,and it reached 2.5 times of present charge ( 12 yuan).Conclusions The present charge on the special care for chronic wound was seriously deviated from the practical cost,and the labor value of special care of nurses could not be embodied.
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Objective To examine the relationship between smoking and tobacco-related mortality in a cohort of the aged Chinese armymen.Methods A cohort study was carried out in Xi'an,China from 1987 to 2005.A total of 1 268 retired male military cadres aged 55 or older were examined in 1987 and followed up in the next 18 years.At baseline,388 men were non-smokers,461 were former smokers,and 419 were current smokers.The current smoking rate was 33.04%,Quitted rate was 52.39%.The terminal main observation items included all-cause and tobacco-associated mortality.Results Up to Jun 30,2005,a total of 491 subjects died.Compared with non-smokers,the relative risks(95% confidence intervals(CI)) of ever-smokers for all-cause deaths,chronic obstructive pulmonary disease(COPD),lung cancer,and coronary heart disease(CHD) were 1.24(1.01-1.53),1.91(1.06-3.46),2.91(1.36-6.23),and 1.15(0.68-1.93),respectively.Compared with current smokers,the risks of total mortality and death from lung cancer for former smokers were decreased by 66.7% and 14.98%,respectively.Conclusions Cigarette smoking was a major death risk factor in the cohort and quitting smoking could save lives.
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BACKGROUND: The training task for aircrew of army airmen is very heavy, the evaluation of flight personnel on psychological diathesis is performed to early discover and deal with corresponding questions.OBJECTIVE: To compare the difference of mental health between aircrew and ground crew of army airmen and provide reference data for implementing corresponding norms.DESIGN: Chester sampling investigation and paired design were applied.SETTING: the 71687 Force of Chinese PLA, the 71521 Force of Chinese PLA, Department of Epidemiology, Fourth Military Medical University of Chinese PLAPARTICIPANTS: By chester sampling, 122 aircrew and 122 ground crew of one army airmen in one stationed training troop were randomized in February 2001. The pairs were made at ratio of 1:1 according to age difference less than 3 years and same sex and nationality. The investigated persons were all male, of Han and aged varied from 23 to 52 years.METHODS: Cornell health questionnaire was adopted respectively in investigation of aircrew and ground crew of army airmen. The investigated persons finished and handed in questionnaire independently on the spot in manner of secretion and centralized filling-up. Cornell health questionnaire is composed of 18 sections, including 195 questions, involving 4 aspects,named somatic symptoms, medial and family history, general health and habit and mental symptoms. The total score of Cornell health questionnaire ≥ 30 indicates somatic and mental disturbance and the score of mental section ≥ 10 indicates mental disturbance, both of which are taken as the criteria in comparison of psychological health in receptors of two groups.MAIN OUTCOME MEASURES: Every factor score and total score in somatic and mental sections in Cornell health questionnaire for aircrew and ground crew.RESULTS: The tested results of each 122 cases in either aircrew group or ground crew group entered result analysis. Evaluated results of somatic and mental symptoms in receptors of two groups: the total score was low in Cornell health questionnaire (0-14 scores), of which, the total score in aircrew group was higher than that in ground crew group (81.5% and 59.8%,P ＜ 0.05); the score in mental section was low (0-9 scores), of which, that in aircrew group was higher remarkably than that in ground crew group (99.2% and 91.8%, P ＜ 0.01); the score for the receptors with somatic and mental disturbance (total score≥30, score in mental section ≥ 10) in aircrew group was lower than those in ground crew group (4.1% and 12.3%, P ＜ 0.05); the score for the receptors with mental disturbance (score in mental section≥ 10) in aircrew group was lower remarkably than ground crew group (0.8% and 8.2%, P ＜ 0.01). For somatic section in aircrew group, except the factors of muscle, skeleton and skin, their scores were higher than those in ground crew group (P ＞ 0.05), the scores of the rest factors were all lower than those in ground crew group, of which, the difference was significant in evaluation of factors of eye, ear, nervous system, urinary reproductive system and fatigue in comparison of two groups (P ＜ 0.05). The score of every factor in mental section of aircrew group was lower than those in ground crew group. Except tension factor, in comparison of the rest factors in two groups, the significant difference was present (P ＜ 0.05).CONCLUSION: Overall psychological health state in Cornell questionnaire of aircrew in army airmen was superior to ground crew. Aircrew still presents a part of psychological health questions, mainly in somatic section and inadaptability was the most positive response in mental section, suggesting that aircrew probably presents inadaptable phenomena.
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Objective To establish two-dimensional electrophoresis(2-DE) profiles with high resolution and reproducibility in analysis of hypothalamuses in the spontaneous hypertension rats(SHR) with hyperactivity of liver-yang to analyze the difference on the total proteins of hypothalamuses between the SHR and normal rats.Methods The total proteins of hypothalamuses in the rats were separated by immobilized pH gradient-based two-dimensional gel electrophoresis.With coomassie blue staining,the 2-DE image was analyzed by PDQuest 7.0 software.Results The average matching rate of the 2-DE images of hypothalamuses in the two kinds rats was 92% with good reproducibility.Proteins were mainly displayed at range of pI3-8,Mr(14.4～75) kD.The average spots in the SHR with hyperactivity of liver-yang and in the normal rats were 777?27 and 780?31 respectively.There were 22 spots of proteins up-regulated more than two times and 25 spots down-regulated more than two times in the SHR with hyperactivity of liver-yang than those of the normal rats.Conclusion There are 22 spots of proteins up-regulated and 25 spots of proteins down-regulated in the SHR with hyperactivity of liver-yang,which may be involved in the development of hyperactivity of liver-yang.
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AIM: To study the HLA-DRB1 genotype and their relation with HBV infection in Shaanxi Han patients.METHODS: HLA-DRB1 genotyping was conducted in 108 case of chronic HBV infection and 108 health controls as well as 32 asymtomatic HBsAg carriers by using polymerase chain reaction-sequence specific primer method.All the patients,asymtomatic HBsAg carriers and health subjects were residents of Shaanxi district and belonged to Han nationality.The association between HLA-DRB1 genotype and different replication of HBV was also studied.RESULTS: DRB1~*04,DRB1~*09,DRB1~*12 and DRB1~*15 were the most common genotypes in Shaanxi Han residents with the frequency of 16.2%,12.5%,11.6% and 13.4%,respectively.Compared to 108 health controls,the allele frequency of HLA-DRB1~*03(10.6% of HBV patients versus 3.7% of health controls,odds ratio=3.10;P