Objective To describe the status of sleeping time among Chinese population.Method The data of 2002 China National Nutrition and Health Survey was used for the analysis.197 954 subjects aged 6 years and above were involved.Results The average daily sleeping time of the domestic Chinese was 8.3 hrs.In groups of 6～12 yrs,13～17 yrs,18～44 yrs,45～59 yrs,60 yrs and above,the daily sleeping time were 9.1 hrs,8.5 hrs,8.2 hrs,7.9 hrs and 7.8 hrs,and the rate of insufficient sleeping was 69.0%,58.5%,4.1%,9.2% and 17.1%,respectively.The rate of excessive sleeping in groups of 18～44 yrs,45～59 yrs and 60 yrs and above were 27.1%,20.2%,24.3%,respectively.Conclusion The status of insufficient and excessive sleeping existed in Chinese at the same time,and further research should be developed on the association between sleeping time and health.

Objective To analyze the determinants of television viewing among people in China,and to provide basic information for developing intervention strategies.Methods The data of 66 601 subjects aged 6 years and over(male 32 254,female 34 347) on television viewing from 2002 China National Nutrition and Health Survey was used.Results The prevalence of watching TV 2h and over among Chinese residents was 60.6%.Female had a decreased likelihood of watching TV 2h and over(adjusted odds ratio,AOR: 0.78).Children aged 13～17 years had a decreased likelihood of watching TV 2 h and over(AOR: 0.71) compared with younger children,however,adults had an increased likelihood(AOR: 1.34 for 18~44 yr,1.16 for 45～59 yr,1.04 for 60 yr and over).Light intense occupations were associated with an increased likelihood of watching TV 2 h and over(AOR: 7.18).Higher family income had an increased likelihood of watching TV 2 h and over(AOR: 1.12,1.07).Highest education level was associated with a decreased likelihood of watching TV 2h and over(AOR: 0.91).Engaging in exercise was associated with a decreased likelihood of watching TV 2h and over(AOR: 0.74).Conclusion Age,gender,socioeconomic status and exercise can influence the time spending on TV among Chinese residents.

A nutrition survey, covering a total of 4801 preschool children in 6 provinces, autonomous regions and municipalities, has been carried out. The objective was to determine the effects of various dietary patterns on the blood hemoglobin, free erythrocyte proporphyrin, and serum ferritin values. The results indicated a high prevalence of iron deficiency (average 51.9%). Iron deficiency anemia was detected in 16.4% of the children examined and the incidence rate was particularly high among infants at the age group of 6 months and one year, which was 28.7% and 22.9% respectively. The dietary patterns were different in the above geographic areas. The results of dietary survey revealed that a low incidence of iron deficiency was found in those children who consumed more animal food and protein.

Objective To summarize the coronary artery pattem of arterial switch operation(ASO),operative skill and surgical results.Methods Between October 1999 to October 2005,102 patients underwent arterial switch operation.The mean age was(8? 16)months ranged from 3 days to 7 years.The mean body weight was(5.9?3.2)kg,ranged from 2.5 kg to 20.0 kg.Most com- monly(74/102),the aorta was more or less to the right of the pulmonary artery.In 10 patients,the aorta was directly anterior to the pulmonary artery,and in 11 patients,the aorta was to the left of the pulmonary artery.The great arteries were side by side in 7 pa- tients.We used Leiden classification for coronary artery pattern by operative descriptions.The most prevalent coronary pattern [1LCx2R]was found in 69(67.6%),abnormal coronary artery pattern in 33(32.3%).Intramural course of coronary artery was fotmd In three patients.The Leeampte maneuver was used in all cases.In most patients,the "open trap door" or "bay window" tech- nique for coronary osfia transfer.Results Total mortality rate was 14.7 %(15 eases),6 cases(8.7 %)with normal coronary pattem and 9(27.3%)deaths 33 patients with abnormal coronary pattern.3 cases with coronary event occurred in 5 deaths of simple rIGA, 4 cases with coronary event in 6 deaths of complex TGA and 3 eases with coronary event in 4 deaths of Taussing-Bing anomaly.Con- clusion Complex coronary artery anatomy increases the operative risk.With experience or improving surgical technique,we may get better results.

Objective To investigate the diagnostic value of endoscopic ultrasonography (EUS) for duodenal cysts.Methods Clinical manifestations, results of conventional gastroscopy and EUS, as well as follow-up, of patients with duodenal cysts were retrospectively analyzed.Results A total of 105 patients with duodenal cysts presented with no lesion-related symptoms, but displayed characteristic imaging changes under EUS, which could reveal the origin, size and nature of duodenal cysts, and differentiate it from other submucosal lesions.A maximum follow-up of 5 years showed no changes in duodenal cysts.Conclusion Duodenal cyst is a benign disease, and EUS plays a very important role in diagnosis of the disease.

Objective To investigate the breakfast behaviors and nutritional quality among primary and secondary students,and to provide scientific evidence for developing intervention strategies.Method Random three-stage clustering sampling method was employed in the study.A questionnaire survey was conducted among 9194 primary and secondary students aged 6-17y,from seven cities in China.Results The rates of primary and secondary students having breakfast everyday were 97.0%,92.4%,and 93.4%,Most of the students had their breakfast within 30 min after getting up,the rates being 75.4%,74.7%,and 68.6% respectively.Mothers primarily cook breakfast for the students,the rates being 53.1%,49.9%,and 49.7% respectively.In most cases,they had breakfast at home,the rates being 71.8%,67.0%,and 63.8% respectively.The rates of students having poor quality breakfast were above 80%.Conclusion Primary and secondary students are one of the focal target people for preventing unhealthy dietary behaviors due to shortcomings of eating breakfast.It is necessary to improve the nutritional quality of breakfast for better health of students.

ObjectiveTo evaluate the clinical efficacy of bladder hydrodistention and intravesical sodium hyaluronate in the treatment of interstitial cystitis (IC).Methods Twenty-one IC patients received intravesical sodium hyaluronate therapy under combined blockage or intravenous anesthesia.Bladders were perfused with normal saline under 100 cm H2O perfusion pressure and expanded for 10 min,the bladders were then injected through a catheter with 40 mg/50 ml sodium hyaluronate which was released after 1 h.Intravesical perfusion was applied once every week four to six times in a course of treatment.Results The average bladder capacity was extended from 191.6 ± 88.7 ml before expansion to 425.3 ± 79.8 ml after bladder expansion ( P =0.000).The extension was done under anesthesia.There were two suspected bladder ruptures after starting the bladder expansion at 6.5 min and 7.2 min.There was significant gross hematuria in 19 cases,10 min after bladder expansion.After treatment,the catheters were removed 24 h after manipulation in 17 patients; the catheters were removed 72 h after manipulation in two cases with hematuria;the catheters were removed four days after manipulation in the two cases of suspected bladder rupture.Pain was significantly reduced after the catheters were removed and the maximum urinary output increased slightly.The day before the second injection of sodium hyaluronate,the urinary frequency decreased significantly than before start of treatment (32.8 vs 18.5 times/24 h).The maximum urinary output increased significantly compared with the output before treatment (86.7 vs 151.9 ml).Pain was reduced significantly after treatment (8.7 vs 3.0).The O'Leary-Sant IC score and the QOL were significantly improved (30.0 vs 17.0,5.9 vs 2.4,respectively) (P =0.000).After the third treatment,the symptoms continued to improve.The treatment results were best in the fifth week at the time of the sixth injection of sodium hyaluronate.Symptoms rebounded at six months.However compared with that before treatment,the difference was still statistically significant ( P =0.000).ConclusionsBladder hydrodistention under anesthesia for severe intractable IC patients produces immediate effectiveness.Sodium hyaluronic infusion can alleviate urinary frequency and pain,and the effectiveness and duration of treatment are positively correlated.

Objective: To analyze the drinking practice of people in China. Method: The data of 2002 China National Nutrition and Health Survey was used for this study. 159 117 subjects aged 15 years and over were involved. The information on drinking practice was collected using interview-administrated questionnaire. Results: The overall current drinking rate of people in China was 21.0%, 39.6% for male and 4.5% for female, respectively. The current drinking rates in urban and rural areas were 20.9% and 21.0%, respectively. The 45 to 59 years age group reached the highest. The rate of onset age of drinking younger than 18 years old was 8.8% in current drinkers. 39.9% male and 29.5% female current drinkers drank at least once a day. Distilled spirits was the first choice for 50.3% current drinkers. 58.2% male drinkers and 77.3% female drinkers consumed 100-150g and 50-100g distilled spirits, respectively. Conclusion: Alcohol drinking has become a public health problem in China, it is necessary to carry out further surveys to reveal the influencing factors.

Objective: To design the “one-year physical activity questionnaire” used in 2002 China National Nutrition and Health Survey. Methods: The intensity of each activity in the questionnaire was assessed from literature review and experts consultation. The energy intake was calculated from food frequency questionnaire for validation of the physical activity questionnaire. Results: The average daily energy expenditure per capita estimated from the questionnaire was 11.6MJ (male 11.9MJ, female 11.2MJ). The average physical activity level (PAL) was 1.95 (male 1.88, female 2.02). There was significant correlation between energy expenditure and energy intake (r = 0.13, P

Objective: To describe the physical activity level and its influencing factors of Chinese professionals, to provide basis for developing intervention strategies. Method: The information on physical activity was collected by one year physical activity questionnaire in "2002 China National Nutrition and Health Survey", and 29 783 professionals aged 18-59 years old(male 15 911, female 13 872)were involved. Metabolic equivalent (MET) was adopted to estimate the intensity level of physical activities. Physical activity level (PAL) was calculated to classify sufficient (PAL≥1.7) or insufficient (PAL