Knowledge about the intrauterine device and interest in using it among women users of primary care services

to analyze the level of knowledge about the intrauterine device, the interest in using it and the relationship between these events among women in reproductive age. cross-sectional study conducted with 1858 women between 18 and 49 years old, attending Primary Health Care Facilities. Data were obtained in face-to-face interviews. The level of knowledge was evaluated by items with answers options "agree", "disagree" and "I don't know". Knowledge was categorized as below/equal and above the median. Chi-square and multiple logistic regression were used in Stata 14.2 (95% confidence level). intrauterine device current use was not frequent (1.7%; n=32) and the level of knowledge was higher among women between 25 and 34 years old, white, living in Aracaju (Sergipe), who were more educated, and who were currently using or had already used the intrauterine device. Interest in using the intrauterine device (38.0%; n=634) was higher among younger women, single, more educated, had health insurance, no children and with higher level of knowledge about the intrauterine device. the level of knowledge about the intrauterine device was associated with the interest in using it.