Materials and Methods: A total of 450 women of reproductive age with a body mass index (BMI) of >18.5 were participated in this study and divided into 3 equal groups (n = 150) of normal weight, overweight, and obese. Instruments used in this study were the Pittsburgh Sleep Quality Index (PSQI) and a socio-demographic questionnaire. Data from the questionnaires were completed by the participants and analyzed using statistical methods.

Results: In this study, 66% of normal weight women of reproductive age had an acceptable sleep quality, while 77% of overweight and 93% of obese women of reproductive age had poor sleep quality, respectively. The results of this study showed that a significant correlation existed between BMI of normal weight women of reproductive age and the components of sleep quality (P = 0.001). An inverse significant relationship was also found between BMI of overweight women of reproductive age and the components of sleep quality (P < 0.05) and finally, an inverse significant relationship was also found between BMI of obese women of reproductive age and the components of sleep quality (P < 0.05). A significant relationship also existed between socio-demographic and components of sleep quality (P < 0.05). It seems that among the components of sleep quality, the effect of sleep disorder, impaired daily functioning, and consumption of hypnotic drugs was higher than sleep duration and good sleep in overweight and obesity.

Conclusion: The results of this study revealed that women of reproductive age with overweight and obesity have poor sleep quality. Among components of sleep quality, sleep disorder, impaired daily functioning, and consumption of hypnotic drugs have the most important role in reducing sleep quality. It seems that change in lifestyle can improve sleep quality and thus can reduce BMI