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. Author manuscript; available in PMC: 2018 May 1.
Published in final edited form as: J Biomed Mater Res A. 2017 Feb 13;105(5):1252–1259. doi: 10.1002/jbm.a.35984

Table 3.

Adjusted R2and sum of squares due to error (SSE) for several simple models of drug release.

Blend Ratio Higuchi (thin film
diffusion)

(Adj R2, SSE)		 Ritger-Peppas
(Fickian diffusion)		 Peppas-Sahlin
(Fickian diffusion
+ degradation)		 Zero-Order
CS:PEO20 −2.66 1.004 0.80 0.047 0.83 0.048 −6.33 2.010
CS:PEO33 0.49 0.324 0.88 0.079 0.84 0.075 −0.40 0.885
CS:PEO50 0.88 0.134 0.89 0.114 0.89 0.098 0.86 0.157