Shi Wu Wen

University of Ottawa, Ottawa, Ontario, Canada

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Publications (220)758.97 Total impact

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    ABSTRACT: Objective: To assess the impact of search strategies for a different language on systematic review results, using English index searches versus Chinese index searches for Chinese literature pertaining to cerebral palsy (CP) as an example. Methods: We conducted two parallel searches with the same search strategy. Both searches looked for studies published in the Chinese language that examined risk factors for CP. The first was conducted in standard English indexes and the second was in standard Chinese indexes. We compared the results using the two searches using a Z-test. Egger's test and Begg's test were used to assess the potential publication bias. Results: Using the English indexes, nine studies were identified. Using the identical search and inclusion/exclusion criteria in the Chinese indexes, seventeen studies were returned. The association between intracranial hemorrhage and CP was much stronger in the studies found in the search by the English indexes (Odds Ratio {OR} 61.73, 95% Confidence Interval (CI) 19.48 to 195.61) than the results from studies identified by the Chinese indexes (OR 9.57, 95%CI 2.42 to 37.88). The association between hypertension and CP was not significant in studies found using the English indexes (OR 1.67, 95%CI 0.34 to 8.30) but was significant in studies identified by searching the Chinese indexes (OR 2.25, 95%CI 1.06 to 4.77). Egger's test suggested that, for the risk factor of preterm birth, some small studies with negative results might have been missed by the search using the English indexes (Egger's test: P=0.00). Conclusions: Searching Chinese literature using English indexes has the potential to fail to identify a substantial number of publications. This bias can result in significant discrepancies in the pooled estimates of risk factors for CP.
    Journal of clinical epidemiology 09/2015; DOI:10.1016/j.jclinepi.2015.09.014 · 3.42 Impact Factor
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    ABSTRACT: Objective: Prenatal folic acid supplementation or maternal folate sufficiency may protect the offspring from obesity and insulin resistance. This study aims to summarize the findings of association between prenatal folic acid supplementation/maternal folate sufficiency and obesity/insulin resistance in the offspring. Methods: Twelve databases were searched for both published and unpublished work of prenatal folic acid supplementation/maternal folate status up to July 1, 2014. Experimental and observational studies on animals and human beings were included based on the eligibility criteria. There were no limits to the time period and language of publication. The study quality was assessed with a 10-Point Scale for Scientific Methodology. Results: The search identified 2548 records. Nine animal studies and five human studies satisfied search criteria were included. Five of these nine animal studies showed a protective effect of folic acid. Of the five human studies, one showed a protective effect of folic acid, two showed a harmful effect, and two showed uncertain results. Conclusions: Data from both animal studies and human studies are inconsistent. Future researches with sophisticated designs are needed to demonstrate the potential protective effect of maternal folate on obesity/insulin resistance in the offspring in animal models and human pregnancies.International Journal of Obesity accepted article preview online, 22 September 2015. doi:10.1038/ijo.2015.189.
    International journal of obesity (2005) 09/2015; DOI:10.1038/ijo.2015.189 · 5.00 Impact Factor
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    ABSTRACT: Background Tuberculosis (TB) is a global public health issue posing serious harm to the human health. Many studies have suggested that smoking and excessive alcohol consumption are risk factors for TB. Laboratory evidence suggests that EGCG in tea leaves can arrest the growth of tubercle bacillus. Can drinking tea lead to decreased susceptibility of TB in humans? Methods A total of 574 TB patients and 582 healthy controls were recruited to participate in this case–control study. Self-designed questionnaire was used to collect data. Unconditioned logistic regression analysis was conducted to identify the associations between tea drinking and TB. Results Tea drinking has a negative association with TB, with OR = 0.583(0.423, 0.804) and P < 0.05. Drinking black tea, oolong and green tea are all negative association with TB, with OR being 0.683(0.517, 0.902), 0.674(0.508, 0.894) and 0.534(0.349, 0.817) respectively and P < 0.05. Trend χ2 test indicated a decreasing risk for TB with increased tea consumption, with P < 0.05. Conclusion There is a significance negative association between tea drinking and TB. Promoting the consumption of tea as the daily drink among populations, particularly those with high TB risk, may reduce the incidence of TB in the populations.
    BMC Public Health 05/2015; 15(1). DOI:10.1186/s12889-015-1855-6 · 2.26 Impact Factor
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    M. Chen · J. Deng · W. Li · C. Su · Y. Xia · M. Wang · X. Li · B. K. Abuaku · H. Tan · S. W. Wen ·
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    ABSTRACT: Chitotriosidase, secreted by activated macrophages, is a biomarker of activated macrophages. In this study, we explored whether chitotriosidase could be adopted as a biomarker to evaluate the curative effect on tuberculosis (TB). Five counties were randomly selected out of 122 counties/cities/districts in Hunan Province, China. Our cases were all TB patients who were newly diagnosed or had been receiving treatment at the Centers for Disease Control (CDCs) of these five counties between April and August in 2009. Healthy controls were selected from a community health facility in the Kaifu district of Changsha City after frequency-matching of gender and age with the cases. Chitotriosidase activity was evaluated by a fluorometric assay. Categorical variables were analysed with the χ 2 test. Measurement data in multiple groups were tested with analysis of variance and least significant difference (LSD). Correlation between chitotriosidase activity and the degree of radiological extent (DRE) was examined by Spearman's rank correlation test. The average chitotriosidase activity levels of new TB cases, TB cases with different periods of treatment (<3, 3–6, >6 months) and the control group were 54·47, 34·77, 21·54, 12·73 and 10·53 nmol/, respectively. Chitotriosidase activity in TB patients declined along with the continuity of treatment. The chitotriosidase activity of both smear-positive and the smear-negative pulmonary TB patients decreased after 6 months' treatment to normal levels ( P < 0·05). Moreover, chitotriosidase activity was positively correlated with DRE ( r = 0·607, P < 0·001). Our results indicate that chitotriosidase might be a marker of TB treatment effects. However, further follow-up study of TB patients is needed in the future.
    Epidemiology and Infection 04/2015; 143(15):1-7. DOI:10.1017/S095026881500062X · 2.54 Impact Factor
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    ABSTRACT: Background Mannose-binding lectin (MBL) and MBL-associated serine proteases 2 (MASP-2) are important proteins in the lectin pathway of the immune system. Polymorphism of MBL and MASP-2 genes may affect the serum concentration of MBL and MASP-2. This study explores the association between MBL and MASP-2 gene polymorphism and their interactions and the susceptibility to tuberculosis (TB). Method A total of 503 patients with TB and 419 healthy controls were recruited to participate in this case-control study. PCR-SSP technology was applied to genotype rs7096206 of MBL genes and rs2273346 and rs6695096 of MASP-2 genes. Demographic data and some exposure information were also obtained from study participants. Unconditional logistic regression analysis was used to identify association between the various factors and TB whilst Marginal Structural Linear Odds Models were used to estimate the interactions. Results Both genotype GC at rs7096206 of MBL genes and genotype TC at rs2273346 and rs6695096 of MASP-2 genes were more prevalent in the TB patient group than the healthy control group (P < 0.05, OR 1.393, 1.302 and 1.426 respectively). The relative excess risk of interaction (RERI) between rs7096206 of MBL genes and rs2273346 and rs6695096 of MASP-2 genes was 0.897 (95% CI: 0.282, 1.513) and 1.142 (95% CI: 0.755, 1.530) respectively (P < 0.05). Conclusion Polymorphisms of MBL (rs7096206) and MASP-2 (rs2273346 and rs6695096) were associated with the susceptibility of TB, and there were gene-gene interactions among them.
    BMC Infectious Diseases 03/2015; 15(1). DOI:10.1186/s12879-015-0879-y · 2.61 Impact Factor
  • Wenhang Chen · Jing Xue · Laura Gaudet · Mark Walker · Shi Wu Wen ·
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    ABSTRACT: The effectiveness of Foley catheter plus misoprostol for cervical ripening has not been convincingly shown in trials. To summarize the evidence comparing Foley catheter plus misoprostol versus misoprostol alone for cervical ripening. Embase, Medline, and Cochrane Collaboration databases were searched with the terms "Foley catheter," "misoprostol," "cervical ripening," and "labor induction." Randomized controlled trials comparing the methods of cervical ripening for delivery of a viable fetus were included. Study characteristics, quality, and outcomes were recorded. Random-effects models were used to combine data. Eight trials were included, with 1153 patients overall. In a pooled analysis of seven high-quality studies, the combination group had a decreased time to delivery (mean difference -2.36hours, 95% confidence interval [CI] -4.07 to -0.66; P=0.007). Risk of chorioamnionitis was significantly increased in the combination group (risk ratio [RR] 2.07, 95% CI 1.04-4.13; P=0.04), and that of tachysystole with fetal heart rate changes was decreased (RR 0.58, 95% CI 0.38-0.91; P=0.02). Frequency of cesarean did not differ (P=0.77). The combined use of Foley catheter and misoprostol results in a reduced time to delivery, a reduced frequency tachysystole with fetal heart rate changes, and an increased incidence of chorioamnionitis. Copyright © 2015. Published by Elsevier Ireland Ltd.
    International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics 03/2015; 129(3). DOI:10.1016/j.ijgo.2015.01.005 · 1.54 Impact Factor
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    ABSTRACT: Background Recent data indicate that more than half of high-income industrialized countries have a cesarean delivery rate of > 25 percent, which is higher than the appropriate level considered by most health professionals worldwide.Methods Data for 31 high-income industrialized countries in 2010 (or the nearest year) obtained from the World Health Organization, Organization for Economic Cooperation and Development, World Bank, and individual countries were analyzed in this study. We examined the correlation between cesarean delivery rate and infant mortality rate with Pearson correlation coefficient analysis, and examined the independent effect of cesarean delivery on infant mortality with multiple linear regression analyses.ResultsThe cesarean delivery and infant mortality rates varied substantially among the included countries: from 15.6 to 50.0 percent and from 1.9 per to 6.8 per 1,000 live births, respectively. Cesarean delivery rates were positively correlated with infant mortality rates (Pearson correlation coefficient: 0.41, p < 0.05). The association remained after adjustment for maternal age, infant sex, per capita GDP, and the Gini index (p < 0.03), but disappeared after further adjustment for preterm birth (p = 0.07). In a sensitivity analysis, the results were not appreciably affected by excluding births at < 22 weeks of gestation, by weighting the data by the number of births in each country, or by excluding data from particular countries with possible measurement issues (USA, Greece).ConclusionsA higher cesarean delivery rate is associated with higher infant mortality rate among these high-income industrialized countries. One of the mechanisms by which cesarean delivery affects infant mortality is through iatrogenic prematurity.
    Birth 01/2015; 42(1). DOI:10.1111/birt.12153 · 1.26 Impact Factor
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    Laura Gaudet · Zachary M Ferraro · Shi Wu Wen · Mark Walker ·
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    ABSTRACT: Objective. To determine a precise estimate for the contribution of maternal obesity to macrosomia. Data Sources. The search strategy included database searches in 2011 of PubMed, Medline (In-Process & Other Non-Indexed Citations and Ovid Medline, 1950-2011), and EMBASE Classic + EMBASE. Appropriate search terms were used for each database. Reference lists of retrieved articles and review articles were cross-referenced. Methods of Study Selection. All studies that examined the relationship between maternal obesity (BMI ≥30 kg/m(2)) (pregravid or at 1st prenatal visit) and fetal macrosomia (birth weight ≥4000 g, ≥4500 g, or ≥90th percentile) were considered for inclusion. Tabulation, Integration, and Results. Data regarding the outcomes of interest and study quality were independently extracted by two reviewers. Results from the meta-analysis showed that maternal obesity is associated with fetal overgrowth, defined as birth weight ≥ 4000 g (OR 2.17, 95% CI 1.92, 2.45), birth weight ≥4500 g (OR 2.77,95% CI 2.22, 3.45), and birth weight ≥90% ile for gestational age (OR 2.42, 95% CI 2.16, 2.72). Conclusion. Maternal obesity appears to play a significant role in the development of fetal overgrowth. There is a critical need for effective personal and public health initiatives designed to decrease prepregnancy weight and optimize gestational weight gain.
    BioMed Research International 12/2014; 2014:640291. DOI:10.1155/2014/640291 · 1.58 Impact Factor
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    Xin Huang · Hongzhuan Tan · Xun Li · Shujin Zhou · Shi Wu Wen · Meiling Luo ·
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    ABSTRACT: The relationship between maternal HBV (hepatitis B virus) infection and pregnancy-induced hypertension (PIH) is inconclusive. Few studies have been conducted in rural areas of China. In order to examine the association between maternal chronic HBV infection and risk of PIH in Liuyang rural area China, we enrolled 6,195 eligible pregnant women in 2010-2011 in selected 14 towns of Liuyang on their first prenatal visit to local maternity care unit. A total of 461 subjects (7.44% (95%CI: 6.79%, 8.10%)) were identified with positive HBsAg status (exposed group) and 5734 were non-HBV carriers (unexposed group). Multivariate log-binomial regression models were used to estimate the risk of PIH, gestational hypertension (GH), and preeclampsia (PE) in relation to maternal chronic HBV infection. There are total of 455 subjects diagnosed with PIH (7.34% (95%CI: 6.70%, 7.99%)), including 371 GH (5.99% (95%CI: 5.40%, 6.58%)) and 81 PE (1.31% (95%CI: 1.07%, 1.64%)). The crude risk ratio between PIH, GH, PE and maternal HBV infection were 1.20 (95%CI: 0.88, 1.64), 1.30(95%CI: 0.93, 1.81) and 0.79 (95%CI: 0.32, 1.93), respectively. After adjustment for gravidity history, abortion history, family history of Diabetes Mellitus (DM) and family history of hypertension, positive HBsAg status was still not significantly associated with PIH (RR = 1.18, 95%CI: 0.87, 1.62), GH (RR = 1.27, 95%CI: 0.91, 1.78) or PE (RR = 0.79, 95%CI: 0.32, 1.95). Additional adjustment for maternal age, marital status, parity history, family history of DM, Body Mass Index at first antenatal visit, folic acid supplementation, smoking status during pregnancy and economic status of living area, multivariate analysis provided similar results. In conclusion, our study found that maternal chronic HBV infection prevalence rate is 7.4% among Liuyang rural area and there is no significant association between maternal HBV infection and the risk of PIH, GH or PE.
    PLoS ONE 12/2014; 9(12):e114248. DOI:10.1371/journal.pone.0114248 · 3.23 Impact Factor
  • A S Yasseen · D B Fell · A E Sprague · R Xie · G Smith · M C Walker · S W Wen ·
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    ABSTRACT: Preventing influenza-like illness (ILI) during pregnancy with antiviral medication use (AVMU) can mitigate serious health risks to mother and foetus. We report on AVMU in pregnant women in Ontario, Canada, and describe characteristics of AVMU during the 2009-2010 H1N1 pandemic. Rates and risk estimates of AVMU were compared across multiple categories and stratified across ILI infection status. Increased AVMU was observed in women with influenza infections, active smokers, those vaccinated against influenza, and those with pre-existing co-morbidities. Decreased AVMU was observed in women with multiple gestations, and those in neighbourhoods of high immigrant concentrations. Our stratified analysis indicated that the observed patterns differed by ILI infection status. We demonstrated that once infected, women across multiple groups were equally likely to use antiviral medications. In this report we also propose possible clinical explanations for the observed differences in AVMU, which will be useful in planning prevention initiatives for future pandemics.
    Journal of Obstetrics and Gynaecology 11/2014; 35(6):1-4. DOI:10.3109/01443615.2014.978846 · 0.55 Impact Factor
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    ABSTRACT: Background: To explore the impact of passive smoking, cooking with solid fuel, mannose-binding lectin (MBL) gene, MBL-associated serine proteases 2 (MASP-2) gene, and gene-environment interactions on the susceptibility to tuberculosis (TB) in non-smokers. Methods: A total of 205 TB patients and 216 healthy controls were recruited to participate in this case-control study. PCR with sequence-specific primers (PCR-SSP) technology was leveraged to genotype rs7096206 of MBL genes and rs2273346 and rs6695096 of MASP-2 genes. Demographic data and information on exposures of participants were collected. Unconditioned logistic regression analysis was conducted to identify associations between the various factors and TB, and marginal structural linear odds models were used to estimate the interactions. Results: Passive smoking and cooking with solid fuel were associated with the risk of TB, with odds ratios (OR) of 1.58 and 2.93, respectively (p<. 0.05). Genotype CG at rs7096206 of MBL genes (OR 2.02) and genotype TC at rs6695096 of MASP-2 genes (OR 1.67) were more prevalent in the TB patients than in healthy controls (p<. 0.05). The relative excess risk of interaction (RERI) between rs7096206 of MBL genes and passive smoking or cooking with solid fuel exposure was 1.86 (95% confidence interval (CI) 0.59-3.16) and 2.66 (95% CI 1.85-3.47), respectively. The RERI between rs6695096 of MASP-2 genes and cooking with solid fuel exposure was 3.70 (95% CI 2.63-4.78), which was also a positive interaction. However, the RERI between rs6695096 of MASP-2 genes and passive smoking was not statistically significant. Conclusions: Passive smoking, cooking with solid fuel, and polymorphisms of MBL (rs7096206) and MASP-2 (rs6695096) genes were associated with susceptibility to TB in non-smokers, and there were gene-environment interactions among them. Further studies are needed to explore details of the mechanisms of association.
    International Journal of Infectious Diseases 10/2014; 29. DOI:10.1016/j.ijid.2014.08.010 · 1.86 Impact Factor
  • Laura Gaudet · Shi Wu Wen · Mark Walker ·
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    ABSTRACT: Objective: To examine the combined effect of macrosomia and maternal obesity on adverse pregnancy outcomes using a retrospective cohort. Methods: Infants with a birth weight of ≥ 4000g (macrosomia) were identified from an institutional birth cohort. Demographic characteristics and maternal, fetal, neonatal, and pregnancy outcomes of macrosomic infants whose mothers were obese were compared with those whose mothers were non-obese. Results: Pregnancies in obese women resulting in macrosomic infants are more likely to be complicated by gestational diabetes, gestational hypertension, and smoking than pregnancies in non-obese women with macrosomic infants. Mothers whose infants are macrosomic are significantly more likely to require induction of labour (OR 1.42; 95% CI 1.10 to 1.98) and delivery by Caesarean section (OR 1.45; 95% CI 1.04 to 2.01), particularly for maternal indications (OR 3.7; 95% CI 1.47 to 9.34), if they are obese. Finally, macrosomic infants of obese mothers are significantly more likely to require neonatal resuscitation in the form of free flow oxygen (OR 1.57; 95% CI 1.03 to 2.42) than macrosomic infants of non-obese mothers. Conclusion: When both maternal obesity and macrosomia are present, adverse pregnancy outcomes are more common than when fetal macrosomia occurs in a woman of normal weight.
    Journal of obstetrics and gynaecology Canada: JOGC = Journal d'obstetrique et gynecologie du Canada: JOGC 09/2014; 36(9):776-784.
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    ABSTRACT: Objective: To assess whether singleton pregnancies conceived by assisted reproductive technology (ART) are associated with an increased use of intrapartum interventions when compared with spontaneous singleton pregnancies. Methods: In total, 1327 ART pregnancies and 5222 spontaneous pregnancies during the period 2004 to 2008 were extracted from BORN (Better Outcomes Registry and Network) Ontario's information system. The incidences of common intrapartum interventions were compared, and different classification systems for Caesarean section were used to compare the indications for these between singleton pregnancies following ART with or without intracytoplasmic sperm injection and singleton spontaneously conceived pregnancies. Results: Compared with spontaneous singleton pregnancies, the ART group had increased incidences of internal electronic fetal monitoring (OR 1.60; 95% CI 1.37 to 1.87), artificial rupture of membranes (OR 1.39; 95% CI 1.17 to 1.66), oxytocin augmentation of labour (OR 1.51; 95% CI 1.28 to 1.77), induction of labour (OR 1.31; 95% CI 1.14 to 1.50), and Caesarean section (OR 1.40; 95% CI 1.24 to 1.60). Conclusion: Singleton pregnancies resulting from ART were associated with more frequent use of several intrapartum interventions, including Caesarean section.
    Journal of obstetrics and gynaecology Canada: JOGC = Journal d'obstetrique et gynecologie du Canada: JOGC 09/2014; 36(9):795-802.
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    ABSTRACT: Background: Carbon monoxide (CO) is one of the main substances contained in fireworks. Previous studies suggested that CO may have protective effect on the development of hypertension of pregnancy. Method: The authors conducted a prospective cohort study in Liuyang, Hunan, China between January 2010 and December 2011. Demographic and life-style variables of the participating pregnant women were obtained through structured interview with the women and clinical data were retrieved from antenatal medical records. Density of fireworks factories was defined as the number of fireworks factories per 1000 residents in the township where the mothers resided during pregnancy. Multiple logistic regression analysis was used to analyze the independent association between maternal exposure to the production of fireworks and new onset hypertension in pregnancy. Results: A total of 5976 pregnant women were included in the final analysis. Density of fireworks factories was inversely correlated with incidence of new onset hypertension in pregnancy (Pearson correlation coefficient = -0.29, p < 0.001). Multiple logistic regression analysis showed that, compared with women who resided during pregnancy in a township with 0-0.25 fireworks factories per 1000 residents, the rates of new onset hypertension in pregnancy in women who resided in a township with 0.26-1.00 fireworks factories per 1000 residents (Odds Ratio = 0.66, 95% confidence interval: 0.46, 0.96) and >1.5 fireworks factories per 1000 residents (Odds Ratio = 0.65, 95% confidence interval: 0.44, 0.97) were reduced by more than 30%. Conclusion: Maternal exposure to the high density of fireworks factories is associated with reduced risk of developing new onset hypertension in pregnancy.
    Hypertension in Pregnancy 07/2014; 33(4). DOI:10.3109/10641955.2014.938752 · 1.41 Impact Factor
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    ABSTRACT: RASSF1A has been reported to be a candidate tumor suppressor in esophageal squamous cell carcinoma (ESCC). However, the association between RASSF1A promoter methylation and ESCC remains unclear. Eligible studies were identified through searching PubMed, Medline, Web of Science, and the China National Knowledge Infrastucture database. Studies were pooled and odds ratios (ORs) with corresponding confidence intervals (CIs) were calculated. Funnel plots were also performed to evaluate publication bias. Twelve studies involving 859 cases and 675 controls were included in this meta-analysis. A significant association was observed between RASSF1A methylation and ESCC overall (OR = 11.7, 95% CI: 6.59-20.9, z=8.36, P<0.00001). Subgroup analysis showed that the OR for heterogeneous tissues was 5.35 (95% CI = 2.95-9.71) while for autologous tissues it was 16.0 (8.31-30.96). For patient sample size, the OR for the <50 subgroup was 9.92 (95% CI = 2.88-34.2) and for the 50 case group was 13.1 (95% CI = 6.59-25.91). The OR for a relationship between RASSF1A methylation and TNM stages was 0.27 (95% CI=0.10-0.77), whereas there were no significant differences in RASSF1A methylation in relation to gender and differentiation among ESCC cases. This meta-analysis suggests a significant association between RASSF1A methylation and ESCC.
    Asian Pacific journal of cancer prevention: APJCP 05/2014; 15(9):3921-5. DOI:10.7314/APJCP.2014.15.9.3921 · 2.51 Impact Factor
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    ABSTRACT: Major efforts have been made to improve the health care system in Hunan province, China. The aims of this study were to assess whether and to what extent these efforts have impacted on gender and regional disparities of Tuberculosis (TB) incidence in recent years, especially for less developed areas. We obtained data from the 2005-2009 China Information System for Disease Control and Prevention (CISDCP)to conduct this study in Hunan province. Counties within the province were divided into four regions according to quartiles based on the 2007 per capita GDP. Index of Disparity (ID) and Relative Index of Inequality (RII) were used to measure the disparities of TB incidence in relation to gender and region. Bootstrap technique was used to increase the precision. The average annual incidence of TB was 111.75 per 100,000 in males and 43.44 per 100 000 in females in Hunan. The gender disparity was stable, with ID from 42.34 in 2005 to 43.92 in 2009. For regional disparity, ID, RII (mean) and RII (ratio) decreased significantly from 2005 to 2009 in males (P < 0.05) but remained stable among the female population. As interventions such as introduction of the New Rural Cooperative Scheme put in place to reduce health disparities in China, regional disparity in relation to incidence of TB decreased significantly, but the gender disparity remains in the Hunan province.
    International Journal for Equity in Health 04/2014; 13(1):32. DOI:10.1186/1475-9276-13-32 · 1.71 Impact Factor
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    ABSTRACT: Objective Labetalol and methyldopa are the two antihypertensive drugs most frequently used to control blood pressure for hypertensive disorders of pregnancy. The objective of this study was to assess if labetalol is associated with poor infant outcomes. Study design: Retrospective population-based cohort study using the linked maternal/infant databases in the Province of Saskatchewan. Women with a diagnosis of a hypertensive disorder of pregnancy who delivered a singleton in Saskatchewan from January 1, 1990 to December 31, 2005 and who were dispensed only labetalol or only methyldopa were included in the study. Occurrences of small for gestational age (SGA) < 10th percentile, SGA < 3rd percentile, preterm birth, stillbirth, hospitalization for respiratory distress syndrome (RDS), sepsis, and seizure during infancy, and infant death were compared. Multiple logistic regression analysis was performed to adjust for potential confounding. Results A total of 1,223 eligible women were included in the final analysis. Among them, 300 received labetalol only and 923 received methyldopa only during pregnancy. For women with chronic hypertension, the rate of hospitalization for RDS, sepsis, and seizure during infancy was significantly higher for infants born to mothers who were dispensed labetalol only as compared with infants born to mothers who were dispensed methyldopa only (adjusted odds ratio (OR) 1.51, 95% confidence interval (CI) 1.02–2.22). Conclusion Compared with methyldopa, the use of labetalol for chronic hypertension of pregnancy may be associated with increased rate of hospitalization during infancy.
    European journal of obstetrics, gynecology, and reproductive biology 04/2014; 175(1). DOI:10.1016/j.ejogrb.2014.01.019 · 1.70 Impact Factor

  • Society for Gynecological Investigation Annual Scientific Meeting, Florence, Italy; 03/2014

Publication Stats

6k Citations
758.97 Total Impact Points


  • 2002-2015
    • University of Ottawa
      • • Department of Obstetrics and Gynecology
      • • Department of Epidemiology and Community Medicine
      Ottawa, Ontario, Canada
    • The Ottawa Hospital
      Ottawa, Ontario, Canada
    • Robert Wood Johnson University Hospital
      New Brunswick, New Jersey, United States
    • French Institute of Health and Medical Research
      • Unité de Recherche Épidémiologique en Santé Périnatale et Santé des Femmes et des Enfants U953
      Paris, Ile-de-France, France
  • 2004-2014
    • Ottawa Hospital Research Institute
      • Clinical Epidemiology Program
      Ottawa, Ontario, Canada
  • 1993-2013
    • McGill University
      • • Department of Pediatrics
      • • Faculty of Medicine
      Montréal, Quebec, Canada
  • 2001-2011
    • The Ottawa Hospital
      • Clinical Epidemiology and Research Program
      Ottawa, Ontario, Canada
    • Laval University
      Quebec City, Quebec, Canada
  • 2005-2008
    • Central South University
      • School of Public Health
      Ch’ang-sha-shih, Hunan, China
    • The Scarborough Hospital
      Pickering, Ontario, Canada
  • 2001-2004
    • Health Canada
      Ottawa, Ontario, Canada
  • 2003
    • People's Hospital of Qingyuan
      Ch’ing-hsü, Shanxi Sheng, China
  • 2000-2001
    • BC Centre for Disease Control
      Vancouver, British Columbia, Canada
  • 1996
    • University of Toronto
      Toronto, Ontario, Canada