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Table 4 Linear and multivariate analysis of the relationship between the plasma levels of KL-6 and clinical parameters

From: Ageing and long-term smoking affects KL-6 levels in the lung, induced sputum and plasma

Variable   Regression coefficient Standard error P-value
Linear Regression Age 8.178 0.960 <0.001***
  BMI 12.879 5.285 0.016*
  Pack-year 6.765 0.939 <0.001***
  FEV1/FVC -8.507 1.684 <0.001**
Multi Regression Age 6.383 1.262 <0.001***
  BMI -3.464 4.999 0.489
  Pack-year 3.832 1.251 0.002**
  FEV1/FVC 1.008 2.054 0.624
  1. BMI, body mass index; FEV1, Forced expiratory volume in one second; FVC, Forced vital capacity