Table 2. Descriptive levels obtained from two-by-two comparisons of phases, for the variable reduced hemoglobin (HbR).

Phases compared		Coefficient 1	Coefficient 2	Coefficient 3
Before clamping	Clamped	0.029	0.029	0.029
Before clamping	After clamping	0.064	0.084	0.131
Clamped	After clamping	0.018	0.016	0.016