CRP and chronic obstructive pulmonary disease: Besides, both groups had lower ESR after treatment compared with that before treatment, but the intergroup difference in ESR after treatment was remarkable, and the study group had much lower ESR compared with the reference group (P < 0.05) At present, some studies have confirmed that the combination of CRP and ESR has effective value for predicting COPD patients' conditions and prognoses, so CRP level and ESR can reflect the patients' treatment situation.