linear regression analysis showed a positive correlation between free t3 and igf-1 levels after treatment ( r = 0.37 , p less than 0.05 ) and a negative relationship between plasma igf-1 levels before treatment and delta igf following t4 replacement therapy ( r = 0.45 , p less than 0.025 ) .
C0021665
igf-1
C0037657
igf