Table 3.

Tukey post hoc analysis (for multiple comparisons)

Groups	Mean difference	P value
I vs. II	343.5	0.001
I vs. III	83.3	0.05
I vs. IV	610.8	0.001
II vs. III	−260.2	0.001
II vs. IV	267.3	0.01

P < 0.05, significant