Fig. 3
From: Association between systemic immune-inflammation index and chronic bronchitis: NHANES 2001–2018

Associations between SII and chronic bronchitis were evaluated by RCS after adjustment for the covariables.
From: Association between systemic immune-inflammation index and chronic bronchitis: NHANES 2001–2018

Associations between SII and chronic bronchitis were evaluated by RCS after adjustment for the covariables.