Fig. 2From: The association between the metabolic score for insulin resistance (METS-IR) index and urinary incontinence in the United States: results from the National Health and Nutrition Examination Survey (NHANES) 2001–2018Smooth curve fitting for the relationship between METS-IR index and three types of UI. (a), (b), and (c) represents the linear associations between METS-IR index and SUI, UUI, and MUI, respectively. The area between two blue dotted line is on behalf of a 95% CI. The red dotted line suggests the positive linear relationship between METS-IR index and three types of UIBack to article page