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Table 7 Mean ± mean standard error of parameters obtained from fitting of TGK2 for direct current treated male groups

From: Efficacy of direct current generated by multiple-electrode arrays on F3II mammary carcinoma: experiment and mathematical modeling

ParametersExperimental groups
TG1-MTG2-MTG3-MTG4-MTG5-MTG6-M
i0 (mA)1842 ± 0.1584.147 ± 0.1861.495 ± 0.0901.516 ± 0.0754.333 ± 0.2327.119 ± 1.084
i/i01.0861.4470.9681.3191.3851.405
γ (days−1)13.197 ± 3.9204.536 ± 0.7697.526 ± 2.51312.742 ± 6.76927.890 ± 9.37910.291 ± 2.321
ei0 (days−1)0.021 ± 0.0030.032 ± 0.0040.019 ± 0.000*0.013 ± 0.000**0.053 ± 0.0090.094 ± 0.005
eγ (days−1)0.009 ± 0.0020.007 ± 0.000+0.008 ± 0.0020.014 ± 0.0090.256 ± 0.0780.048 ± 0.007
SSE (cm3)0.649 ± 0.1310.101 ± 0.0330.221 ± 0.0790.115 ± 0.0520.068 ± 0.0240.522 ± 0.268
SE (cm3)0.120 ± 0.0030.041 ± 0.0080.068 ± 0.0130.040 ± 0.0130.036 ± 0.0090.082 ± 0.034
RMSE (cm3)0.116 ± 0.0040.040 ± 0.0080.066 ± 0.0120.039 ± 0.0130.034 ± 0.0080.080 ± 0.033
PRESS (cm3)0.095 ± 0.0400.008 ± 0.0050.031 ± 0.0120.017 ± 0.0130.014 ± 0.0070.103 ± 0.072
MPRESS (cm3)0.095 ± 0.0410.009 ± 0.0050.028 ± 0.0120.017 ± 0.0130.013 ± 0.0070.104 ± 0.072
\(r_{a}^{2}\)0.960 ± 0.0350.794 ± 0.1980.993 ± 0.0030.997 ± 0.0010.989 ± 0.0060.996 ± 0.002
Dmax (cm3)0.956 ± 0.0380.992 ± 0.0020.992 ± 0.0030.085 ± 0.0320.065 ± 0.0150.182 ± 0.068
  1. *0.019±0.0005, **0.013±0.0003 and +0.007±0.0001. TGK2 was the second part of the direct current perturbed F3II tumor growth kinetic. The variable i0 was the polarization current and ei0 its estimation error. The variable γ was the exponential decay ratio and eγ its estimation error. The maximum distance, root means square error, sum of squares of errors, standard error of the estimate, adjusted goodness-of-fit coefficient of multiple determination, predicted residual error sum of squares and multiple predicted residual sum error of squares were denoted by parameters Dmax, RMSE, SSE, SE, \(r_{a}^{2}\), PRESS and MPRESS (for m = 3), respectively. Legends of TG1-M, TG2-M, TG3-M, TG4-M, TG5-M and TG6-M were defined in Experiment subsection