Abstract: Objective: To investigate the effects of individualized lifestyle intervention based on Information-Motivation-Behavioral (IMB) model in the patients with Polycystic Ovary Syndrome (PCOS). Methods: A total of 84 patients with PCOS in Reproductive Medicine Centre in a tertiary grade A hospital were divided into experimental group (n=42) and control group (n=42) with convenient sampling method. The patients in the control group were provided routine lifestyle intervention, while patients in the experimental group were treated with the individualized lifestyle intervention based on the IMB model. Patient Body Mass Index (BMI), waist to hip ratio, fat weight, body fat rate, skeletal muscle weight and quality of life level were investigated at the time of grouped, the third month after discharge. Results: After intervention, the BMI, waist to hip ratio, fat weight and body fat rate in the experimental group were lower than the control group (P<0.05), and the score of quality of life in the experiment group were higher than the control group (P<0.05). Conclusion: The individualized lifestyle intervention based on IMB model can effectively reduce the patient BMI, waist to hip circumference ratio, fat weight, body fat ratio, and improve patients' quality of life. It can provide a new path for clinical management of PCOS patients as well.

Key words: Polycystic Ovary Syndrome; IMB model; lifestyle management; body composition analysis; quality of life