Progress in research of influence of gene polymorphisms on immune response / 中华流行病学杂志

Genes play an important role in the immune system response, and different gene loci may result in different vaccine immune response rates. This review focuses on the correlation between gene polymorphisms and vaccine immune response in order to investigate the influence of gene polymorphisms on the immune response to vaccines. It discusses the effect of an individual's immune response after vaccination at genetic level and provides a scientific basis for individualized immune development strategies. It reveals that human leukocyte antigen genes, various cytokines and their receptor genes, and Toll-like receptor genes all affect the vaccine immune response.

A cohort study on the association between dynamics of thyroid volume and the changes of physical growth as well as the comparison of different thyroid volume indexes in school-aged children / 中华流行病学杂志

Objectives: To investigate the association between the dynamics of thyroid volume and the changes of physical growth in school-aged children as well as to compare the applicability of different thyroid volume indexes, so as to explore more reliable methods for the assessment of thyroid volume. Methods: In October 2012, a multi-stage cluster sampling method was used to select a primary school in Minhang district of Shanghai, Haimen city of Jiangsu province and Yuhuan city of Zhejiang province, respectively. In these areas, a total number of 784 students aged 8-10 years were enrolled in the cohort. Demographic data was collected, while height and weight were measured, with BMI and body surface area (BSA) were calculated. Thyroid volume was examined by B-ultrasonography. Height volume index (HVI), weight and height volume index (WHVI), BMI volume index (BMIV) and BSA volume index (BSAV) were all applied to correct the thyroid volume. All students were followed up, one year later. Results: A total of 769 students with complete data on thyroid volume and physical growth were enrolled, including 378 boys (49.16%) and 391 girls (50.84%). Thyroid volume showed an increase with age, while growth of thyroid volume reduced with the increase of age (P<0.001). The thyroid volume showed a correlation with the changes of physical growth. The growth of height appeared as the dominant influencing factor for thyroid volume growth in those aged 8 and 10 years (P<0.05), while the growth of weight, BMI and BSA were all influencing factors for thyroid volume on students aged 9 years (P<0.05). Conclusions: Thyroid volume in school-aged children was a factor not only associated with age but also with physical growth which had not been considered in the currently used criteria. The inclusion of items as iodine intake, age, physical growth into the thyroid volume indexes seemed to be more reliable, in practice. For the assessment of goiter, HVI for students aged 8 and 10 years and BMIV for students aged 9 years might serve as better indicators.

Factors affecting falls in community-dwelling individuals with stroke in Singapore after hospital discharge

<p><b>INTRODUCTION</b>This study aimed to investigate the factors affecting the incidence of falls among individuals with stroke living in the community one year after discharge from a rehabilitation hospital in Singapore.</p><p><b>METHODS</b>A cross-sectional telephone survey of individuals with stroke living in the community was carried out one year after discharge. The interview covered aspects such as incidence and circumstances of fall, use of walking aids, and presence of environmental obstacles. Each participant's case record was retrospectively reviewed using discharge Fugl-Meyer (FM) assessment of the upper and lower limbs, functional independence measure (FIM) and Berg Balance Scale (BBS).</p><p><b>RESULTS</b>A total of 126 individuals with stroke were interviewed. Overall, 24% fell in the year following their discharge. Factors associated with falls were longer length of hospital stay, lower BBS and lower-limb FM scores, and lower discharge FIM scores for the Bladder and Bowel Management, Transfer, Mobility, Communication, and Social Cognition domains (p < 0.05). The fallers were more likely to use walking aids, and required help with basic activities of daily living after discharge (p < 0.05). Multivariate logistic regression analysis revealed that only the Transfer domain was an independent factor for falls.</p><p><b>CONCLUSION</b>Discharge FIM outcomes, especially for the Transfer domain, can be used to identify communitydwelling individuals with stroke who have a high fall risk after discharge. Identification of such individuals will enable early fall prevention management, which will in turn minimise fall events in the community.</p>