Visual acuity of young men in China: Results from 3 national cross-sectional surveys from 1974 to 2012.

The prevalence of low vision has increased in China especially among youth population, which is an important public health issue. The trend on the prevalence of subnormal visual acuity and updated information is essential to quantify health effects and to prompt decision makers to prioritize action and assess the effectiveness of measures. Therefore, the study aimed to analyze the prevalence and geographical distribution of visual acuity level among young men in China based on 3 national cross-sectional surveys from 1974 to 2012.

Betel quid chewing without tobacco: a meta-analysis of carcinogenic and precarcinogenic effects.

Betel quid without tobacco is an important factor influencing the incidences of oral cancer and precancer. This study systematically evaluated the associations between betel quid containing no tobacco and oral cancer and precancer, with implications for the prevention of oral cancer. We searched MEDLINE, ISI Web of Science, and EMBASE (to April 2011) and retrieved studies that investigated the relationship between chewing betel quid and oral cancer (or precancer).

Factor analysis of a health-promoting lifestyle profile (HPLP): application to older adults in Mainland China.

Unlabelled: This research reports preliminary psychometric properties, especially the factor structure, of a Chinese version of a health-promoting lifestyles profile designed for older adults; and examines the distribution of the health-promoting behavioral patterns - both for the purpose of developing culturally sensitive health advancement strategies for Chinese seniors. Responses to this questionnaire were used to measure health-promoting behaviors in a random sample of 1012 elderly Chinese from thirty communities in Xi'an Shaanixi-Province.

Design: Factor analysis relied on polychoric correlations with ordinal categorical data were used to evaluate reliability and validity of a revised Chinese version of the health-promoting lifestyles profile (HPLP-C).

[Selection of sentinel sites for death surveillance, using cluster or unequal probability sampling].

Unlabelled: To compare the sampling errors from cluster or unequal probability sampling designs and to adopt the unequal probability sampling method to be used for death surveillance. Taking 107 areas from the county level in Shaanxi province as the sampling frame, a set of samples are drawn by equal probability cluster sampling and unequal probability designs methodologies. Sampling error and effect of each design are estimated according to their complex sample plans.

Body mass index of male youths aged 18-20 years of the Han nationality living in different regions of China.

The study was conducted to assess the nutritional status and levels of body mass index (BMI, kg/m2) and to evaluate the geographical distribution of male youths of the Han nationality in China. In total, 60,773 male youths, aged 18-20 years, of the Han nationality, were categorized into underweight, normal-weight, overweight, and obesity according to the international adult BMI cut-offs. Different levels of nutritional status and BMI of male youths of the Han nationality were compared among different areas.

[Artificial neural network in the prediction of nosocomial infection risk].

Objective: To establish a model based on artificial neural network in the prediction of nosocomial infection risk.

Methods: Clinical data of 27,352 inpatients extracted from hospital information system were cleaned and coded, and the model of prediction in nosocomial infection risk was developed based on artificial neural network.

Results: The structure of artificial neural network is {16-6-1}-BP, and the fit rate of prediction was 0.

Geographical differences in physiques of male youth of age 18-20 years in China.

Three national surveys on the physical status of 18-, 19-, and 20-year-old male candidates for military service were carried out in six geographic regions of China in 1955, 1974, and 2001. Data from these surveys for 72,000 individuals were compared by region, by time, and by age, and estimates of incremental changes by decade were made. Overall, at all time points, males in the north and northeast areas were larger and heavier than males in the southwest.

Body mass index reference curves for children aged 0-18 years in shaanxi, china.

Objectives: Health care professionals have recommended the use of age-related body mass index (BMI) to evaluate obesity in children. Until now, no age-related reference curves for BMI have been reported in China. Presented here are age-related BMI percentile curves for children aged 0~18 years in Shaanxi, China, 1995.

Geographical differences in blood pressure of male youth aged 17-21 years in China.

Hypertension is one of the most prevalent cardiovascular risk factors in the adult Chinese population. The prevalence distribution of hypertension differs geographically in adults, since hypertension is influenced by environment factors, such as climate, altitude and economic. The aim of the present study was to study the prevalence of hypertension and measure the blood pressure (BP) level, and to compare and observe the geographical distribution of borderline or high BP in Chinese male youth.

Chinese literature associated with diagnosis of Helicobacter pylori.

Aim: To synthetically analyze and probe into the diagnosis of H pylori infection, we followed the principles of evidence-based medicine.

Methods: A total of 22 papers of prevalence survey and case-control studies were selected for studying about diadynamic methods. Using meta-analysis, we analyzed the different diadynamic methods of H pylori in China.

[Meta-analysis on Helicobacter pylori infection between sex and in family assembles].

Objective: To understand and analyze the infection situation of Helicobacter pylori (H. pylori).

Methods: Extensively reviewing Chinese literature collecting the related with electronic documents in combination with manual retrieve and using Meta-analysis to do a quantitative analysis.