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Objective To investigate the association between maternal pre-pregnant body mass index and gestational weight gain,as well as their interaction on neonatal birthweight.Methods We built a cohort in Anqing Municipal Hospital from January 2014 to March 2015,enrolling pregnant women who decided to give birth in this hospital.All women were asked to fill a questionnaire for basic information collection.Medical information of both pregnant women and their newborns were obtained through electronic medical record.Chi-square analysis,multinomial logistic regression,multiplicative and additive interaction methods were used to analyze the association between prepregnant body mass index and gestational weight gain as well as their interactions on birth weight of the neonates.Results A total of 2 881 pregnant women were included in this study.Of the 2 881 newborns,359 (12.46％) were small for gestational age (SGA) and 273 (9.48％) were large for gestational age (LGA).After adjusting the possible confounding factors,results from the multinomial logistic regression showed that pre-pregnancy underweight women were more possible to deliver SGA (aRR=1.33,95％CI:1.02-1.73).If the gestational weight gain was below the recommended criteria,the risk of SGA (aRR=1.64,95％ CI:1.23-2.19) might increase.Pre-pregnancy overweight/obese could increase the risk of being LGA (aRR=1.86,95％ CI:1.33-2.60).Maternal gestational weight gain above the recommendation level was associated with higher rates of LGA (aRR=2.03,95％CI:1.49-2.78).Results from the interaction analysis showed that there appeared no significant interaction between pre-pregnancy BMI and gestational weight on birthweight.Conclusion Pre-pregnancy body mass index and gestational weight gain were independently associated with neonatal birthweight while pre-pregnancy BMI and gestational weight gain did not present interaction on birthweight.
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Objective To investigate the association between maternal pre-pregnant body mass index and gestational weight gain,as well as their interaction on neonatal birthweight.Methods We built a cohort in Anqing Municipal Hospital from January 2014 to March 2015,enrolling pregnant women who decided to give birth in this hospital.All women were asked to fill a questionnaire for basic information collection.Medical information of both pregnant women and their newborns were obtained through electronic medical record.Chi-square analysis,multinomial logistic regression,multiplicative and additive interaction methods were used to analyze the association between prepregnant body mass index and gestational weight gain as well as their interactions on birth weight of the neonates.Results A total of 2 881 pregnant women were included in this study.Of the 2 881 newborns,359 (12.46％) were small for gestational age (SGA) and 273 (9.48％) were large for gestational age (LGA).After adjusting the possible confounding factors,results from the multinomial logistic regression showed that pre-pregnancy underweight women were more possible to deliver SGA (aRR=1.33,95％CI:1.02-1.73).If the gestational weight gain was below the recommended criteria,the risk of SGA (aRR=1.64,95％ CI:1.23-2.19) might increase.Pre-pregnancy overweight/obese could increase the risk of being LGA (aRR=1.86,95％ CI:1.33-2.60).Maternal gestational weight gain above the recommendation level was associated with higher rates of LGA (aRR=2.03,95％CI:1.49-2.78).Results from the interaction analysis showed that there appeared no significant interaction between pre-pregnancy BMI and gestational weight on birthweight.Conclusion Pre-pregnancy body mass index and gestational weight gain were independently associated with neonatal birthweight while pre-pregnancy BMI and gestational weight gain did not present interaction on birthweight.
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Objective Intrahepatic cholestasis during pregnancy (ICP) and its relation to incidence of preterm birth (PTB) were under study.Methods A prospective cohort study was carried out that including all the hospitalized pregnant women with live singleton births,from January 2014 to March 2015 in Anqing Municipal Hospitals.Informed consent was followed in every pregnant woman with related demographic information collected through questionnaire and hospital electronic medical record system.Both univariate and multi-variate statistical methods were used to analyze the relations between ICP and incidence of PTB.Results A total of 2 758 pregnant women were included in this study.The incidence proportions of ICP and PTB appeared as 7.25％ and 16.28％ respectively.Results from the logistic regression analysis showed that ICP increased the risk of both overall PTB (RR=2.33,95％CI:1.67-3.25) and medically indicated PTB (RR=8.46,95％CI:5.45-13.12),but not the spontaneous PTB (RR=0.94,95％CI:0.57-1.54).Conclusion ICP seemed to have increased the risk on medically indicated PTB but not the spontaneous PTB.
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Objective To evaluate and compare the detection consistency of hepatitis B surface antigen (HBsAg) by two immunoassays: enzyme-linked immunosorbent assay (ELISA) and electrochemiluminescent immunoassay (ECLIA). Methods A prospective study was conducted among 2296 pregnant women recruited consecutively from January 1, 2014 to January 31, 2015 in a hospital. Blood samples were collected from them for the detection of HBsAg by using ELISA and ECLIA, Ka ppa test was performed on the results. Nested polymerase chain reaction and sequencing of HBV S gene were also performed in all samples. Phylogenetic analysis was performed using Mega 6.0 software. Results The two methods had high detection consistence of HBsAg ( Ka ppa=0.71). There were significant differences in detection result of B genotype and adw2 serotype HBV strains between two methods. Among 123 identified HBV strains, 113 belonged to genotype B and available for further analysis. The difference in detection of substitution rates between two methods or different positive groups were not significant. Compared with ELISA single positive group, the ECLIA single positive group had completely different substitution sites. Conclusion The two methods had high detection consistence of HBsAg, but there were still 32.4% HBV DNA positive cases in ELISA/ECLIA single positive group, and complete complementary substitution sites between ELISA single positive group and ECLIA single positive group. Our results suggested that more effective detection procedure should be considered for the possible impact of the HBV silent transmission and infection.
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Objective To evaluate and compare the detection consistency of hepatitis B surface antigen (HBsAg) by two immunoassays: enzyme-linked immunosorbent assay (ELISA) and electrochemiluminescent immunoassay (ECLIA). Methods A prospective study was conducted among 2296 pregnant women recruited consecutively from January 1, 2014 to January 31, 2015 in a hospital. Blood samples were collected from them for the detection of HBsAg by using ELISA and ECLIA, Ka ppa test was performed on the results. Nested polymerase chain reaction and sequencing of HBV S gene were also performed in all samples. Phylogenetic analysis was performed using Mega 6.0 software. Results The two methods had high detection consistence of HBsAg ( Ka ppa=0.71). There were significant differences in detection result of B genotype and adw2 serotype HBV strains between two methods. Among 123 identified HBV strains, 113 belonged to genotype B and available for further analysis. The difference in detection of substitution rates between two methods or different positive groups were not significant. Compared with ELISA single positive group, the ECLIA single positive group had completely different substitution sites. Conclusion The two methods had high detection consistence of HBsAg, but there were still 32.4% HBV DNA positive cases in ELISA/ECLIA single positive group, and complete complementary substitution sites between ELISA single positive group and ECLIA single positive group. Our results suggested that more effective detection procedure should be considered for the possible impact of the HBV silent transmission and infection.
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In coal mines, main occupational hazard is coal-mine dust, which can cause health problem including coal workers' pneumoconiosis and lung cancer. Some heat shock proteins (Hsps) have been reported as an acute response to a wide variety of stressful stimuli. Whether Hsps protect against chronic environmental coal-mine dust over years is unknown. It is also interesting to know that whether the expression of Hsp27 and Hsp70 proteins as a marker for exposure is associated risk of lung cancer among coal miners. We investigated the association between levels of Hsp27 and Hsp70 expression in lymphocytes and plasma and levels of coal-mine dust exposure in workplace or risk of lung cancer in 42 cancer-free non-coal miners, 99 cancer-free coal miners and 51 coal miners with lung cancer in Taiyuan city in China. The results showed that plasma Hsp27 levels were increased in coal miners compared to non-coal miners (P<0.01). Except high cumulative coal-mine dust exposure (OR=13.62, 95%CI=6.05-30.69) and amount of smoking higher than 24 pack-year (OR=2.72, 95% CI=1.37-5.42), the elevated levels of plasma Hsp70 (OR=13.00, 95% CI=5.14-32.91) and plasma Hsp27 (OR=2.97, 95% CI=1.40-6.32) and decreased expression of Hsp70 in lymphocytes (OR=2.36, 95% CI=1.05-5.31) were associated with increased risk of lung cancer. These findings suggest that plasma Hsp27 may be a potential marker for coal-mine dust exposure. And the expression of Hsp27 and Hsp70 levels in plasma and lymphocytes may be used as biomarkers for lung cancer induced by occupational coal-mine dust exposure.