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Table 4 ANOVA test and Post Hoc multiple comparisons of mean area fraction of p53 immunopositivity in relation to different grades of MEC:

From: Image cytometric analysis of p53 and mdm-2 expression in primary and recurrent mucoepidermoid carcinoma of parotid gland: immunohistochemical study

Descriptive statistics (P53)

Grade

Number of fields (Records)

Mean Area Fraction

Standard Deviation

Grade I

12

13.18917

1.426180

Grade II

44

20.91700

5.846319

Grade III

32

25.26250

7.679862

ANOVA (p53)

P53

 

Sum of Squares

df

Mean Square

F

P Value

 

Between Groups

1295.4

2

647.68

16.478

0.0001

 

Within Groups

3183.8

81

39.31

  
 

Total

686.99

83

   

Post Hoc (Tukey HSD)

Dependent Variable

(I) Groups

(J) Groups

Mean Diff.

P Value

Significance

P53 Mean Area Fraction

Grade I

Grade II

-7.727833

< 0.001

S*

  

Grade III

-12.073333

< 0.001

S

 

Grade II

Grade III

- 4.345500

< 0.001

S

  1. * The mean difference is significant at the 0.05 level