Table 3 Results (p-values) of Tukey’s test (ANOVA post hoc) for six pairwise comparisons of four groups

Dia(midbrain)

 < 0.001^b

 < 0.001^b

 < 0.001^b

 < 0.001^b

0.005^b

0.764

Dia(pons)

0.983

0.291

0.134

0.064

0.053

0.704

Area(midbrain)

 < 0.001^b

 < 0.001^b

 < 0.001^b

 < 0.001^b

0.003^b

0.958

Area(pons)

0.684

0.014^a

0.060

0.101

0.222

0.949

Volume(midbrain)

0.088

 < 0.001^b

 < 0.001^b

0.003^b

0.005^b

0.614

Volume(pons)

0.995

0.016^a

0.027^a

0.008^b

0.026^a

0.805

Ratio(diameter)

 < 0.001^b

 < 0.001^b

 < 0.001^b

0.206

0.53

0.998

Ratio(area)

 < 0.001^b

 < 0.001^b

 < 0.001^b

 < 0.001^b

0.048^a

0.993

Ratio(volume)

 < 0.001^b

 < 0.001^b

0.0157^b

0.993

0.996

0.980

Volume(SCP)

0.854

0.060

0.297

0.180

0.555

0.999

Volume(brainstem)

0.854

0.001^b

0.004^b

0.003^b

0.012^a

0.756