Table 2.

Pearson correlation coefficients

	Diaphragm Po	p-Akt/total Akt	p-4E-BP1/total 4E-BP1	CSA of Diaphragm Type IIx/b Fibers
Duration of spontaneous breathing, h	r = 0.65*, P < 0.0001	r = 0.81, P < 0.0001	r = 0.68, P < 0.001
Diaphragm Po		r = 0.45, P < 0.05	r = 0.54, P < 0.05	r = 0.45*, P < 0.01

Correlations between duration of spontaneous breathing or diaphragm tetanic force (P_o) and diaphragm P_o, the ratio of phosphorylated Akt (p-Akt) to total Akt, the ratio of phosphorylated eukaryotic initiation factor 4E binding protein (p-4E-BP1) to total 4E-BP1, and the cross-sectional area (CSA) of the diaphragm type IIx/b fibers

^*Correlations are made with all groups considered in the analysis.