CRP can be elevated in some other chronic conditions, such as emphysema and chronic bronchitis, showing a persistent inflammatory response, while another study showed that CRP levels were not significantly higher in mild/moderate emphysema cases compared to those without emphysema, yet CRP titers were modestly correlated with FEV(1)% in people with airflow obstruction [307,308]. This evidence concerns the gene CRP and chronic bronchitis.