Results There was a linear regression relationship between the course of the disease, smoking index of asthma patients and the improvement rate of FEV1.

结果 1。哮喘患者病程、吸烟指数与支气管舒张试验中FEV1改善率有线性回归关系；

youdao

Results There was a linear regression relationship between the course of the disease, smoking index of asthma patients and the improvement rate of FEV1.

结果 1。哮喘患者病程、吸烟指数与支气管舒张试验中FEV1改善率有线性回归关系；

youdao