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Table 4 Stepwise regression analysis for the inactivation of S. enterica serotype Typhimurium at 28 ± 2 °C in powdered Legon-18 pepper (C. annuum)

From: The role of gamma irradiation and storage at 28 ± 2 °C on the inactivation of Listeria monocytogenes, Escherichia coli and Salmonella enterica serotype Typhimurium in sun-dried Legon-18 pepper (Capsicum annuum) powder

Step

Change

Step (P value)

Final (P value)

R2 adjusted (%)

1

Add X2

0.000*

0.000*

58.357

2

Add X1

0.000*

0.000*

82.228

3

Add X1X2

0.000*

0.000*

84.719

4

Add (X2)2

0.000*

0.000*

86.507

5

Add (X1)2

0.001*

0.001*

87.111

  1. Values marked as * are statistically significant (p < 0.05)