An assessment of the relationship between bone loss and carbonated beverages: a meta-analysis / 预防医学

Objective The aim of the present study was to estimate the quantitative contributions of carbonated beverages consumption to bone loss.Methods We pedormed computer searches of PubMed,Cochrane Library,EBSCO,CALIS to search for studies investigating the relationship between carbonated beverages and bone loss.For carbonated beverages investigated in a comparative way,we use random effect model to compute pooled odds ratios (ORs) and Cochran Q statistic to estimate the heterogeneity.Results A total of 10 studies met the inclusion criteria and the relationships between carbonated beverages and bone loss were considered,including colas and bone loss.The following associations were found for carbonated beverages and low bone density (OR =1.28,95％ CI =1.02-1.60),carbonated beverages and bone fractures (OR =1.53,95％ CI =1.04-2.26),colas and bone fractures (OR =2.00,95％ CI =1.24-3.24).Condusion The present results indicate that carbonated beverages were associated with bone loss.This meta-analysis may have important public health implications given the widespread use of carbonated beverages.

A survey on the nutritional status of vitamin A among urban residents / 预防医学

Objective To evaluate the nutritional status of vitamin A among urban residents. Methods Using stratified random sampling method,a total of 400 residents from two cities in Zhejiang were selected. They were interviewed by questionnaire,also, the dietary survey, physical measurement and blood sample testing were used. According to Recommended Nutrient Intake( RNI)of vitamin A,to evaluate the intake of Vitamin A and analysis the nutritional status and influenc factors. Results The median of vitamin A concentration was 0. 463( inter-quartile range is 0. 213)μg/mL, and the percentage of severe vitamin A deficiency( VAD ),VAD,insufficiency and adequate serum vitamin A were 0. 25%,0. 50%,6. 75% and 92. 50% respectively. Among 299 individuals who participated in the dietary survey,the median of daily vitamin A intake was 350. 5( inter-quartile range was 351. 5)μgRE. Only 25. 42% of participants' dietary intake of vitamin A met the level of 80% RNI,while 61. 87% of peoples' daily intake of vitamin A under 60%RNI. Male, from the bigger city,older age,high level of triglyceride and more intake of cholesterol may contribute to a higher level of serum vitamin A. Conclusion The majority of urban residents had adequate vitamin A . But the intake of dietary vitamin A still should be paid more attention. Serum vitamin A was associated with age,gender and district.

A research on the dietary intake of selenium among rural and urban residents / 预防医学

Objective To understand the dietary intake of selenium and its influencing factors among rural and urban residents in Zhejiang province. Methods From 2010 to 2012,a total of 2,659 residents were selected from large urban sites,small-medium urban sites and rural sites in Zhejiang. Using 24 -hour dietary recall method,a 3 -day household dietary survey to analysis the dietary intake of selenium. Results The average daily dietary intake of selenium for residents aged 1-,4-,7 -,11 -,14 -,18 -,45 - and 60 - was 21. 96,26. 39,31. 62,35. 26,29. 39,41. 78,39. 12 and 38. 40 μg,respectively. According to formulation of Chinese Nutrition Society,the dietary selenium intake of 42. 56%juveniles and 52. 09% of adults was below the estimated average requirement( EAR). Significant statistical differences were found between normal group and insufficient dietary selenium intake group in terms of age,sex,region,level of education, per capita annual income,physical exercise and smoking status(all P<0. 01). Influencing factors of insufficient selenium intake were female(OR =1. 86,95%CI:1. 59 -2. 63),rural area( OR =1. 46,95%CI:1. 23 -1. 73),lower level of education(OR=0. 70,95%CI:0. 57 -0. 86)and lower income( OR =0. 72,95% CI:0. 60 -0. 88). Conclusion Influencing factors of dietary selenium intake are sex,region,level of education and per capita income. Dietary selenium supplement should be strengthened through a variety of ways,especially in target population.

An investigation on vitamin D status of residents in Zhejiang province / 预防医学

Objective To evaluate the vitamin D status of residents in two cities of Zhejiang province.Methods 442 participants from Hangzhou and Ningbo were selected using multi-stage cluster random sampling method,then the blood samples were collected and the serum level of 25 -hydroxyl vitamin D [25 (OH)D]was detected by the method of radioimmunoassay to analyze the Vitamin D status.Results Median (25 th-75 th percentile)level of serum 25 (OH)D in subjects aged 6 -11,12 -17,18 -44,45 -59 and over 60 years were 53.19 (41.85 -64.89),48.76 (32.56 -60.52),59.91 (48.05 -72.79),68.67 (55.50 -78.07)and 70.97 (56.91 -84.65)nmol/L,respectively.The number of vitamin D deficiency [25(OH)D<25 nmol/L],insufficiency[25≤25(OH)D <50 nmol/L],normal [50≤25 (OH)D <75 nmol/L ],sufficiency [25 (OH )D ≥75 nmol/L ] were 2.95%,30.84%,44.22% and 22.00%, respectively.Conclusion The deficient and insufficient status of vitamin D is common among residents in two cities of Zhejiang province.Vitamin D nutrition situation should be improved.

Exposure assessment on dietary lead and cadmium of residents in three areas of Zhejiang province from 2009 to 2010 / 中华预防医学杂志

<p><b>OBJECTIVE</b>To assess the safety of dietary lead and cadmium intake in 3 areas of Zhejiang province.</p><p><b>METHODS</b>Using the total dietary study method, the study was conducted in 3 regions which represented coastal, city and rural areas in Zhejiang province from 2009 to 2010. The dietary survey was conducted on the residents (512 subjects) and the categories and volume of food consumption were obtained. The analytical food samples were obtained by food consumption survey, food aggregation, food sampling and preparation. The food samples were detected by inductively coupled plasma mass spectrometry (ICP-MS). The safety of dietary lead and cadmium intake was evaluated.</p><p><b>RESULTS</b>The median dietary lead intake (P₅₀) in Zhejiang province was 37.8 µg/d. The 97.5% dietary lead intake (P₉₇.₅) was 72.3 µg/d. The P₅₀ dietary lead intakes of different age and gender groups ranged from 23.2 to 44.2 µg/d. The P₉₇.₅ dietary lead intakes of different age and gender groups ranged from 34.2 to 88.1 µg/d. The P₅₀ dietary cadmium intake in Zhejiang province was 9.6 µg/d. The P₉₇.₅ dietary cadmium intake was 15.7 µg/d. The P₅₀ dietary cadmium intakes of different age and gender groups ranged from 6.4 to 11.4 µg/d, accounting 15.6% - 42.6% of PTMI (provisional tolerable monthly intake, 25 µg/kg). The P₉₇.₅ dietary cadmium intakes of different age and gender groups ranged from 10.5 to 21.4 µg/d, accounting 27.5% - 77.6% of PTMI. Vegetable (11.3 µg), cereal (11.0 µg) and meat (9.8 µg) were the first three food sources which accounted for 84.9% of dietary lead (P₅₀: 37.8 µg/d). Cereal (3.6 µg), vegetable (2.1 µg) and legume (0.9 µg) were the first three food sources which accounted for 68.8% of dietary cadmium (P₅₀: 9.6 µg/d).</p><p><b>CONCLUSION</b>Dietary lead and cadmium intakes of most residents in 3 areas of Zhejiang province as well as the average level are safe.</p>