Abstract Background The global prevalence of insufficient physical activity (PA) was reported to be 27.5% in 2016, and there were stable levels of insufficient PA worldwide between 2001 and 2016. The global target of a 10% reduction in insufficient PA by 2025 will not be met if the trends remain. The relevant data for trends in China were still scarce. This study aimed to determine nationwide temporal trends in insufficient PA among adults in China from 2010 to 2018. Methods 645 903 adults aged 18 years or older were randomly selected from four nationally representative cross-sectional surveys of the China Chronic Disease and Risk Factor Surveillance conducted in 2010, 2013, 2015, and 2018. PA was measured using the Global Physical Activity Questionnaire. Temporal changes in insufficient PA prevalence and participation of domain-specific moderate- to vigorous-intensity PA (MVPA) were analyzed using logistic regression. Results From 2010 to 2018, the age-adjusted prevalence of insufficient PA in China increased from 17.9% (95% confidence interval 16.3% to 19.5%) in 2010 to 22.3% (20.9% to 23.8%) in 2018 ( P for trend < 0.001). By age group, with a significant increase in insufficient PA in adults aged 18–34 years ( P for trend < 0.001), which rose more rapidly than in adults aged ≥ 35 years ( P for interaction < 0.001). Insufficient PA has increased significantly among adults engaged in agriculture-related work, non-manual work, and other manual work (all P for trend < 0.05). And among the occupational groups, those engaged in agriculture-related work had the fastest increase ( P for interaction = 0.01). The percentage of adults participating in work-related MVPA decreased from 79.6% (77.8% to 81.5%) to 66.8% (64.9% to 68.7%) along with a decrease in time spent on work-related MVPA, while percentages of adults participating in recreation-related MVPA increased from 14.2% (12.5% to 15.9%) to 17.2% (16.0% to 18.4%) (all P for trend < 0.05). Conclusions Among Chinese adults, an increasing trend was found in insufficient PA from 2010 to 2018, with more than one-fifth of adults failing to achieve the recommendation of adequate PA. More targeted PA promotion strategies should be developed to improve population health.
Mobile populations are at increased risk for HIV infection. Exposure to HIV prevention messages at all phases of the migration process may help decrease im/migrants' HIV risk. We investigated levels of exposure to HIV prevention messages, factors associated with message exposure, and the association between exposure to prevention messages and HIV testing behavior among Mexican im/migrants at different phases of the migration process. We conducted a cross-sectional, probability survey of Mexican im/migrants (N = 3,149) traveling through the border city of Tijuana, Mexico. The results indicate limited exposure to prevention messages (57-75%) and suboptimal last 12-month HIV testing rates (14-25%) across five migration phases. Compared to pre-departure levels (75%), exposure to messages decreases at all post-departure migration phases (57-63%, p < .001). In general, exposure to prevention messages is positively associated with greater odds of HIV testing at the pre-departure, destination, and interception phases. Binational efforts need to be intensified to reach and deliver HIV prevention to Mexican im/migrants across the migration continuum.
Home smoking bans significantly reduce secondhand smoke exposure among children, but parents may offer discordant reports on whether there is a home smoking ban. The purpose of this study was to examine national trends in (a) parental discordance/concordance in the reporting of home smoking bans and (b) correlates of discordant/concordant reports among two-parent households with underage children from 1995 to 2007. Data from the 1995/1996, 1998/1999, 2001/2002, 2003, and 2006/2007 Tobacco Use Supplement of the U.S. Current Population Survey were used to estimate prevalence rates and multinomial logistic regression models of discordant/concordant parental smoking ban reports by survey period. Overall, the percentage of households in which the 2 parents gave discordant reports on a complete home smoking ban decreased significantly from 12.7% to 2.8% from 1995 to 2007 (p < .001). Compared with households where both parents reported a complete smoking ban, discordant reports were more likely to be obtained from households with current smokers (p < .01) across survey periods. Compared with households where both parents reported the lack of a complete home smoking ban, discordant reports were more likely among households with college graduates, no current smokers, and parents with Hispanic ethnicity (p < .05). Parental concordance on the existence of a home smoking ban increased from 1995 to 2007. This suggests estimates of home smoking bans based on just one parent may be more reliable now than they were in the past. Interventions to improve the adoption and enforcement of home smoking bans should target households with current smoker parents.
Objective
To explore the spatial distribution clustering and influencing factors of chronic Keshan disease in China, and to provide evidence for prevention and control of Keshan disease.
Methods
Using non-probability sampling methods, combined with case search and key surveys, data on national detection rate of chronic Keshan disease, on disease influencing factors in 2013-2014 were collected; a spatial database was established, and ArcGIS 9.0 software was used to perform global Moran's I, local Moran's Ii, local Getis-Ord Gi and inverse distance weighted interpolation analysis for the detection rate of national chronic Keshan disease. Spatial regression was used to analyze the influencing factors of chronic Keshan disease.
Results
Global autocorrelation analysis showed that Moran's I= 0.03, Z= 2.72, P < 0.01, indicating that there was aggregation in the detection rate of Keshan disease. The results of local Moran's Ii showed that there were local high-detection rate clusters in the wards of Keshan disease, and the high-high aggregation areas were mainly concentrated in the wards of Gansu, Inner Mongolia, and Shanxi; the high-low aggregation areas were mainly located in the wards of Heilongjiang, Jilin, Shandong; the low-high aggregation area were mainly located in the wards of Heilongjiang. Getis-Ord Gi autocorrelation results showed that Keshan disease hotspots were mainly located in the wards of Inner Mongolia, Heilongjiang, Gansu, Shandong, Shanxi and Yunnan; the results of reverse distance weighted interpolation showed that the detection rates of the counties in Gansu and Inner Mongolia were higher than that in Heilongjiang, Jilin, Liaoning, Shanxi, Shandong, Shaanxi and Yunnan, the detection rate of wards in other provinces was at a lower level. Spatial regression analysis showed that the spatial distribution of chronic Keshan disease was negatively related to rural per capita net income and annual average temperature in the ward (Z=-2.808,-2.747, P < 0.05).
Conclusions
Global chronic Keshan disease exists spatial aggregation, the local gathering area is mainly located in the wards of Gansu, Inner Mongolia. The spatial distribution of chronic Keshan disease may be affected by the level of rural per capita net income and annual average temperature in the ward.
Key words:
Keshan disease; Spatial autocorrelation; Inverse distance weighted; Spatial regression analysis
ABSTRACT Background Human papillomavirus (HPV) vaccines have been recommended as primary prevention of HPV-related cancers for over 10 years in the United States, and evidence reveals decreased incidence of HPV infections following vaccination. However, concerns have been raised that HPV vaccines could decrease fertility. This study examined the relationship between HPV immunization and self-reported infertility in a nationally representative sample. Methods Data from the 2013-2016 National Health and Nutrition Examination Survey were analyzed to asses likelihood of self-reported infertility among women aged 20 to 33, who were young enough to have been offered HPV vaccines and old enough to have been queried about infertility (n=1,114). Two logistic regression models, stratified by marital history, examined potential associations between HPV vaccination and infertility. Model 1 assessed the likelihood of infertility among women who had never been pregnant or whose pregnancies occurred prior to HPV vaccination. Model 2 accounted for the possibility of latent and/or non-permanent post-vaccine infertility by including all women 20-33 years old. Results 8.1% reported any infertility. Women who had ever been married and had received an HPV vaccine were less likely to report infertility (OR 0.04, 95% CI 0.01-0.57) in model 1. No other associations between HPV and infertility were found. Conclusion There was no evidence of increased infertility among women who received the HPV vaccine. These results provide further evidence of HPV vaccine safety and should give providers confidence in recommending HPV vaccination. Further research should explore protective effects of HPV vaccines on female and male fertility. What is already known on this subject? Despite evidence that HPV vaccines are safe and effective, concerns persist regarding a purported link between HPV vaccination and infertility. These concerns were refuted by a recent population-based cohort study that found no association between the HPV vaccine and primary ovarian insufficiency. What this study adds? This study broadens the existing evidence by exploring possible associations between HPV vaccination and any self-reported infertility. There was no evidence of infertility among women 20-33 years old who received one or more doses of HPV vaccine. This result provides further evidence of HPV vaccine safety, diminishing remaining concerns among clinicians and the public.
Objective To study the changes of leptin and insulin-like growth factor-Ⅰ (IGF-Ⅰ) in adoles-cents with anorexia nervosa(AN) before and after three months of therapy. Methods The plasma levels of leptin and IGF-Ⅰ were measured in 11 adolescents with AN before and after three months of therapy and 11 normal ado-lescents of the same age,and their height,weight were examined and their body mass index(BMI) was calculated,and the results were compared before and after therapy, and were compared with those from age-matched normal adolescents respectively. Results (1)The plasma levels of leptin and IGF-Ⅰ , as well as the BMI in the AN patients after three months of therapy were significantly higher, than those before the therapy, and both were significantlylower than those in the controls. (2)Significant correlations between the plasma leptin levels and IGF-Ⅰ and BMI were detected in the AN patients both before and after the therapy, as well as in the controls. (3)Significant correla-tions between the plasma leptin levels and IGF-Ⅰ were detected in the AN patients both before and after the thera-py, as well as in the controls. Conclusion The plasma levels of leptin and IGF-Ⅰ resulted in significant changes, and these changes were consistent with body fat content in adolescents with AN.
Key words:
Leptin; Insulin-like growth factor-Ⅰ ; Anorexia nervosaiAdolescents
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