Obesity refers to a complex chronic disease in which there is excessive accumulation of body fat. As of 2016, there were more than 650 million obese people worldwide, and it is expected to reach 1.12 billion by 2030, with at least 2.8 million deaths due to obesity each year, according to surveys. In Europe, 60 percent of the population is already overweight or obese. The incidence of obesity is also increasing rapidly in China, with a recent report by The Lancet showing that the number of obese people in China has reached 85 million, making it the country with the highest number of obese people in the world. In 2002, the China Obesity Task Force recommended threshold value to define overweight as Body Mass Index (BMI) of ≥ 24 kg/m2, a waist circumference (WC) ≥of 85 cm for men and a WC ≥ 80 cm for women, or a Waist-to-Hip Ratio (WHR) of ≥ 0.9 for men and a WHR ≥ 0.8 for women, and to define obesity as a BMI ≥ 28 kg/m2. Studies have shown that Asian populations have higher health risks at the same BMI and WC levels due to the distribution of adipose tissue. Acupoint thread embedding is a widely recognized therapy to lose weight in clinical practice.But there are some doubts about the effectiveness of acupoint thread embedding versus sham acupoint thread embedding in treating obesity due to its lack of medical evidence.

This randomized placebo-controlled clinical trial is aimed to investigate the effect and safety of acupoint thread embedding (ATE) in obese patients. The investigators designed a protocol for a randomized controlled trial, in which 132 eligible patients will be randomly assigned to one of the two groups: the ATE group (receiving ATE treatment with health education) and the sham acupoint thread embedding (SATE) group (receiving SATE treatment with health education). A total of 6 sessions of interventions will be given for consecutive 12 weeks, followed by 12 weeks follow-up period. Each session of ATE or SATE treatment will last for about 30 minutes. The primary outcome is the change of the body mass index (BMI) at week 12. The secondary outcomes include the change of patient's body weight and body circumference, results from the blood tests (FBG, LDL-C, HDL-C, TG and TC), the abdominal visceral fat tissue thickness scanned by abdominal B-ultrasound, data collected from the body composition analyzer, the and scores of the impact of weight on quality of life (IWQOL-Lite), the well-being index (WHO-5), visual analog scale (VAS) of appetite and hamilton anxiety scale(HAMA). All adverse effects will be accessed by the treatment emergent symptom scale (TESS) from baseline to the follow-up period. The body weight and circumferences and BMI will be calculated at baseline, week 6, week 12, and week 24. The IWQOL-Lite, WHO-5, VAS, the HAMA, blood tests and abdominal B-ultrasound will be calculated at baseline and week 12. All patients will be provided with the same health education brochure to choose more beneficial personalized lifestyle during the 12-week intervention period.

All analyses will be performed on the intention-to-treat (ITT) population of participants who have at least one treatment. Missing data will be handled using the multiple imputation method, on the assumption that values at each time point follow a specific distribution calculated by the computer software R V.3.5. The primary outcome is the change of the body mass index (BMI) at week 12. Linear mixed effects models will be used for analyses with the use of the statistical software SPSS V.20.0. The t-test will be used to compare the measurement data between either two groups from the baseline to follow-up; the rank sum test will be used for ranked data while the Chi-squared test will be used to analyze categorical data. The significance level that will be used for statistical analysis with 2-tailed testing will be 2.5%. Data values will mainly be presented as Mean±SD. The findings from this trial will help further explore the efficacy and safety of ATE on losing weight for patients with obesity, as well as determine the differences between the ATE and SATE treatment.