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Gestational diabetes mellitus (GDM) is one of common complications during pregnancy, maternal and child safety threat, increasing the risk of pregnancy. With the increasing incidence of GDM, people pay more and more attention to the researches on its risk factors. Gestational insulin resistance is now more accepted as GDM's main pathogenesis. In addition to the pregnant women of traditional factors such as age, race, family history of diabetes, pregnant women before pregnancy, and the body mass index (BMI), pregnant women in vivo storage content genetic polymorphism and infectious factors are associated with the occurrence of GDM. The papers in recent years on the risk factors of GDM progress are reviewed in the paper. [ABSTRACT FROM AUTHOR]

The statistical data of age structure in rural household register population is a kind of basic information for studying rural problems. Taking the survey data as control group, this paper constructed a correction model of statistical data for rural household register population, according to which the statistical data of rural household register population age structure in Chencang district of Baoji city in Shaanxi province was modified. The results showed that the total adjusted rural household register population increased by 3.65% compared to the statistical amount when the relative error bounds was set as 10%, in which the amount of men increased by 1.99% and that of women increased by 5.43%. While the total adjusted rural household register population would expand by 3.70% in which the amount of men increased by 3.59% and that of the women increased by 3.83% when the relative error bounds was set as 5%. The results indicate that it is feasible to make date correction of the statistical data of register population using the constructed model, which also provides a basic datum for studying rural social issues. [ABSTRACT FROM AUTHOR]

Objective: To investigate the prevalence and awareness status of hypertension in adult Gansu Gannan Tibetan population., Methods: A total of 6948 adult (aged 18 and over) Tibetan residents were selected by random cluster multistage method. Participants were divided into city, rural dwellers and rural nomads groups. Questionnaires were collected and blood pressure measured from all participants., Results: Prevalence of hypertension in this district was 24.6% (1708/6948), of which city, rural dwellers and nomadic areas were 25.3% (848/3340), 22.7% (628/2765), 27.5% (232/843), respectively. Prevalence of hypertension was significantly higher in city than in rural dwellers group (P<0.05), significantly higher in rural nomads group than in city and rural dwellers groups (all P<0.05). Awareness, treatment and control rates of hypertension in city group were 35.7% (303/848), 25.1% (213/848), 6.9% (59/848), respectively; in rural dwellers group were 28.3% (178/628), 19.3% (121/628), 4.7% (30/628), respectively; in rural nomads group were 16.8% (39/232), 8.6% (20/232), 2.2% (5232), respectively. Rates of awareness, treatment and control were significantly lower in rural dwellers than in city group (all P<0.01), and significantly lower in rural nomads group than in city and rural dwellers groups (all P<0.01)., Conclusions: Prevalence of hypertension in Gansu Gannan Tibetan population aged 18 and over is high. Awareness, treatment and control rates of hypertension are low, especially in rural dwellers and rural nomads residents.

Objective: Impulsivity is one of the core symptoms of children with attention deficit hyperactivity disorder (ADHD). In order to understand the neuromechanism of the impulsive behaviors in ADHD children, this study investigated the specific functional areas of the brain by functional MRI., Methods: The subjects consisted of 10 ADHD children with impulsivity, 7 ADHD children without impulsivity and 9 normal children. A functional MRI examination was performed when the subjects were instructed to finish GO and STOP tasks with the GO-STOP impulsivity paradigm. The MRI data during the two tasks of GO and STOP were averaged and the corresponding activation regions between groups were compared., Results: The data from the GO task revealed that the main activation regions of the normal children included frontal pole (superior frontal gyrus, middle frontal gyrus and medial frontal gyrus); the main activation regions of ADHD children without impulsivity were cerebellum (posterior lobe and anterior lobe bouton) and cingulated gyrus; those of ADHD children with impulsivity were medial globus pallidus and insula. The data from the STOP task showed that the main activation regions of normal children included superior frontal gyrus and middle frontal gyrus; those of ADHD children without impulsivity were middle frontal gyrus and cingulate gyrus; those of ADHD children with impulsivity were uncus and putamen. The activation regions of ADHD children with impulsivity were much fewer than the other two groups., Conclusions: The behavior of impulsivity-control involves a number of specific functional areas in the cerebral cortex. Compared with normal children, ADHD children without impulsivity have weaker brain function and brain activation, and ADHD children with impulsivity demonstrate much fewer brain activation regions, worse brain function and little awareness of the cerebral cortex.