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Table 5 Multiple linear regression models

From: Value of serum and induced sputum surfactant protein-D in chronic obstructive pulmonary disease

Multiple linear regression model for six month exacerbation frequency by serum and induced sputum SP-D levels
  Coefficient B Standard error t p
Constant −0.37 0.32 −1.15 0.25
Serum SP-D levels 0.008 0.002 4.22 0.0001
Sputum SP-D levels 0.011 0.009 1.18 0.247
Multiple linear regression model for induced sputum SP-D levels by six month exacerbation frequency and number of years on inhaled steroid treatment.
  Coefficient B Standard Error t p
Constant 16.948 3.78 4.4 0.0001
Six month exacerbation frequency 1.38 2.14 0.64 0.525
Number of years on inhaled steroid treatment 2.848 0.53 5.37 0.0001
Multiple linear regression model for serum SP-D levels by age, FEV1 (%) and six month exacerbation frequency
  Coefficient B Standard error t p
Constant 17.660 70.64 0.25 0.80
Age 1.461 1.08 1.35 0.187
FEV1(%) −0.61 0.45 −1.36 0.182
Six month exacerbation frequency 42.598 9.85 4.32 0.0001
  1. FEV 1 forced expiratory volume, SP-D surfactant protein D.