Objective To investigate the water quality of finished water of the centralized water supply system in Shenzhen according to 106 indexes of water quality standards of China.Methods The collection and preservation of water samples was according to the standard examination methods for drinking water-collection and preservation of water samples (GB/T 5750.2-2006).The sanitary quality of the finished water samples collected from 35 centralized water supply systems in cities were determined and evaluated according to the Standards for Drinking Water Quality (GB 5749-2006) in May of 2008.Results The average qualified rate of drinking water was 82.9% (29/35) in Shenzhen.Among 106 indexes,4 indexes (such as turbidity,aluminum,manganese and free chlorine residue) exceeded the standard limits in degrees in some centralized water supply system.Conclusion According to the results of the present paper,it is considered that the water quality of the product water from the centralized water supply system in Shenzhen is good.

Objective To know the medication compliance in elderly patients with hypertension,to analyze the influence factors of medication compliance,and to propose forward intervention countermeasures.Methods The treatment of hypertension in elderly patients was investigated by questionnaire survey.Medication compliance and influence factors were analyzed.Results 166 cases with poor medication compliance,and the rate was 45.0％; 203 cases with good medication compliance,and the rate was 55.0％.It's showed significantly difference on degree of education between the observation group and control group (x2 =12.071,P=0.002).The proportion of peasant and worker was higher in the observation group than control group (78.9％ vs.62.1％,x2 =12.817,P=0.002).The smoker (48.8％) and drinker (59.0％) in observation group more than smoker (27.1％) and drinker (31.0％) in control group(x2=18.481,P＜0.001; x2=29.115,P＜ 0.001).The ratio of payout of-pocket for healthcare was higher in the observation group (21.1％) than control group (9.9％) (x2=9.084,P=0.003).The duration of hypertension was longer in the observation group (8.8±4.6) than control group (6.0±4.1) (t=1.806,P=0.036).The income per month was less in the observation group (1850±150) than control group (2150±200) (t=5.799,P＜ 0.001).There were regression relationship between medication compliance and degree of education,medical security and duration of hypertension.Conclusions According to the influence factors of medication compliance in elderly hypertensive patients,it's useful to improve medication compliance by enhancing health education and designing a personal treatment.

Objective:To summarize the prenatal sonographic characteristics of affected joints of fetal arthrogryposis multiplex congenita (AMC) by comparing the ultrasonographic features and the postnatal pathological manifestations.Methods:The cases of AMC detected by antenatal ultrasound and confirmed by postnatal pathology were collected in the First Affiliated Hospital of Sun Yat-Sen University and Kaiping Central Hospital from January 2015 to June 2020. The differences between prenatal ultrasonic manifestations, types of affected joints and postnatal pathological features were analyzed. And the different involvements of joints in AMC cases with or without other system abnormalities were also explored separately.Results:A total of 31 cases of AMC were included, in which 11 cases were with other system abnormalities and 20 cases without. No significant difference was observed in number of affected joints between these two groups ( P>0.05). The prenatal sonogram features were completely consistent with the postnatal pathological manifestations in 21 (21/31, 67.7%) cases. Among 31 cases, the involvement rates of joints were: interphalangeal joints of fingers (23/31, 74.2%), knee joints (20/31, 64.5%) and ankle joints (19/31, 61.3%), temporomandibular joint (11/31, 35.5%), wrists (11/31, 35.5%), elbow joints (10/31, 32.3%), interphalangeal joints of toes (6/31, 19.4%), spinal joints (2/31, 6.5%), shoulder joint (1/31, 3.2%) and hip joint (1/31, 3.2%), respectively. The coincidence rates of prenatal ultrasound in involved joints were: interphalangeal joints of fingers (100%), ankles (100%), spines (100%), hips (100%), wrists (90.9%), knees (75.0%), elbows (70.0%), jaws (54.5%), interphalangeal joints of toes (50.0%), and shoulders (0), respectively. Conclusions:When postural abnormalities of fetal upper and lower extremities are detected by prenatal ultrasound screening, especially overlapping fingers, extended knee and club foot, AMC should be kept on alert. Simultaneously, other joints should be carefully scanned to improve the prenatal detection rate of AMC.

Objective To study the efficacy of laparoscopic tumor resection combined with iodine-125 and radiofrequency ablation in the treatment of rectal carcinoma with synchronous hepatic metastasis. Methods There were 30 patients diagnosed as rectal carcinoma with synchronous hepatic metastasis detected by CT scan. Hepatic metastases were confirmed by needle biopsy under laparoscopy. Laparoscopic radical resection of rectal carcinoma and metastatic hepatic tumors was performed. Those metastatic tumors that could not be resected were managed by RAF. Iodine-125 was planted in the tumors' site. Results Seven new hepatic metastases were found by the laparoscopic ulstrasound during the operation. 8 hepatic metastatic lesions were removed, 25 tumors located in the right liver were managed by RAF. All patients were followed-up from 12 to 25 months(average 22. 3 months), Local recurrence was found in 6 patients, the 1-year survival rate was 73% (22/30). Conclusions Laparoscopic excision, Iodine-125 and radiofrequency ablation in the treatment of rectal carcinoma with synchronous hepatic metastasis is safe、effective、minimally invasive.

Objective: To understand the status and food sources of daily dietary intake of sodium and potassium among adult inhabitants in Tianjin city, and to compare the consistence of sodium and potassium intake determined by combination of 3 consecutive 24-hour recalls and weighing family condiments (3 d dietary survey method) with 24 h urine sodium and potassium determination. Methods: Multistage cluster sampling method was applied to select 1 955 adult inhabitants from 840 households of 7 districts in Tianjin in 2015. Questionnaire survey was used to obtain basic information, 3 d dietary method was used to obtain dietary information, and 450 subjects was selected by systematic random sampling method for 24 h urine collection and determination of sodium and potassium, and 153 complete 24 h urine samples were selected by the coefficient of urinary creatinine excretion, then the consistence of the determination was compared with 3 d dietary survey method. Results: 1 828 subjects were enrolled in this study with age of (54.6±14.7) years, among which 858 were male (46.9%). The average standard intake of sodium and potassium per people per day were (5 631.2±3 372.1) mg and (1 662.1±750.5) mg, while the average actual daily intake were (5 315.8±3 196.5) mg and (1 560.7±696.8) mg. 98.7% (1 804/1 828) of the subjects had dietary sodium intake exceeding the recommended adequate intake of China residents(1 300-1 500 mg/d), while 78.5% (1 435/1 828) consumed dietary potassium below the recommended adequate intake(2 000 mg/d). The main resource of sodium was condiments, among which cooking salt accounted for 61.5%, soy sauce accounted for 11.2%. Potassium mainly came from cereals (32.4%) and vegetables (18.1%). Compared with the 24 h urine sodium method, 3 d dietary method overestimated the sodium intake with a gap [median (P₂₅, P₇₅)] as 401.7 (-1 130.6, 1 939.5) mg/d with statistical difference (P<0.05). The gap [median (P₂₅-P₇₅)] for potassium between the two methods was 79.1 (-577.5, 565.2) mg/d, without statistical difference (P>0.05). Conclusion The dietary intake of sodium is high while potassium is low among adults inhabitants in Tianjin city. Compared with the 24 h urine sodium and potassium determination, the 3 d dietary method has a good consistency in evaluating the dietary potassium intake level of the population, but overestimates the dietary sodium intake.

OBJECTIVETo investigate incidence of HIV infection and identify associated risk factors among men who have sex with men (MSM) in common bathing pools in Tianjin.

METHODSA prospective cohort study was conducted among the MSM recruited in a common bathing pool in Tianjin from 2011 to 2013. A total of 733 MSM were surveyed to obtain the information about their sociodemographic characteristics, HIV-related knowledge awareness and sexual behaviors, and subsequent follow-up surveys were carried out every four months. Cox regression analysis was conducted to identify the risk factors for HIV infection.

RESULTSA total of 59 HIV infection cases were found in the 2.5-years follow-up survey. The cumulative follow-up time was 7384.9 person-months. The incidence rate of HIV infection was 9.59/100 person-year. The multivariate Cox regression analysis showed that young age, low score of HIV/AIDS knowledge awareness (HR=1.82, 95%CI:1.03-2.66), having two and more sexual partners during past 6 months (HR=1.74, 95%CI: 1.26-2.58) and syphilis (HR=2.36, 95%CI:1.31-3.27) were significantly associated with HIV infection in this MSM cohort.

CONCLUSIONSLow score of HIV/AIDS knowledge awareness, young age, having two and more sexual partners during past 6 months and syphilis were the risk factors for HIV infection in MSM in common bathing pools. It is necessary to strengthen the HIV surveillance and intervention in this population.

Baths ; China ; epidemiology ; HIV Infections ; epidemiology ; Homosexuality, Male ; statistics & numerical data ; Humans ; Incidence ; Male ; Prospective Studies ; Risk Factors ; Surveys and Questionnaires