胸部低剂量CT定量指标与肺气流受限的相关性分析  被引量:8

Correlation between the parameters quantified by chest low-dose CT scan and airflow limitation examined by spirometry

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作  者:陈淑靖[1] 顾宇彤[1] 张静 余勇夫[3] 计海婴[1] 王桂芳[1] 李丽[1] 龚颖[1] 陈刚 白春学[1] 

机构地区:[1]复旦大学附属中山医院呼吸科,上海200032 [2]放射科 [3]复旦大学公共卫生学院卫生统计教研室,上海200032

出  处:《国际呼吸杂志》2012年第11期833-837,共5页International Journal of Respiration

摘  要:目的探讨胸部低剂量CT(LDCT)定量指标和肺气流受限及其严重程度的相关性,建立初步相关模型。方法纳入2008年7月至2012年2月在我院同步完成LDCT和肺功能检查的48例40岁以上有吸烟史的患者,对LDCT定量指标和肺功能指标进行相关性分析,并结合年龄、性别等因素建立回归模型。通过绘制受试者工作特征曲线(ROC曲线)确定对气流受限的判断作用最佳的LDCT定量指标。结果经调整年龄、性别及BMI校正后,EV和EI与FEV1、FEV1%pred、FEV1/FVC和TLC%pred呈负相关(P〈0.05),但与RV/TLC%pred则无明显相关性(P〉0.05);确定最佳回归模型为FEV1/FVC%=94.17+25.31×性别(gender)-0.58×年龄(age)-10.84×In(EI(%));FEV1%pred=141.76-0.78×年龄(age)-14.07×In(EI(%))。经ROC曲线确定对气流受限的判断作用最佳的LDCT定量指标为EL结论EI可用于判别有无气流受限,通过回归方程计算可估测气流受限和肺气肿严重程度。LDCT有望用于COPD的早期诊断。Objective The purpose of the current study was to determine the correlation between the parameters quantified by chest low-dose CT scan (LDCT) and airflow limitation examined by spirometry. Methods This study included 48 patients above 40 years old and with smoking history who underwent LDCT and spirometry on the same day. The regression model was generated on the base of the LDCT value which correlated best to airflow limitation using ROC curve. Results With age, gender and body mass index adjusted, EV and EI significantly correlated negatively with FEV1 , FEV1% predicted, FEV1/FVC and TLC%predicted (P〈0.05), but had no correlation with RV/TLC% predicted (P 〉 0.05 ). The regression model were FEV1/FVC%= 94.17 + 25.31 X gender -0.58 × age -10.84 × In (EI (%)),FEV1%predicted=141.76-0.78×age -14.07×In (EI(%)). The best LDCT value for airflow limitation estimation was EI. Conclusions EI may be used to estimate whether airflow limitation exited and to calculate its severity by regression model. LDCT might be a new way for early detection of COPD.

关 键 词:慢性阻塞性肺疾病 胸部低剂量CT 肺气肿指数 

分 类 号:R563.9[医药卫生—呼吸系统]

 

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