Table 3.

Linear regression equations of drug released percent and amide group concentration.

Model drug	Regression equation	Regression coefficient R	Cr
ETO	Y = −5.006X+70.485	0.9730	−5.006
KET	Y = −3.612X+89.408	0.9832	−3.612
GEM	Y = −4.286X+83.984	0.9372	−4.286
ZOL	Y = −4.038X+60.682	0.9817	−4.038
PRO	Y = −2.792X+75.593	0.9772	−2.792
LID	Y = −2.287X+82.538	0.9855	−2.287