Table 2.

Correlation between IAP, GP and UBP in supine and with 45 degree anti-trendelenburg elevation, in baseline and with wlwvated IAP to 15 mmHg

	Position	Mean (SD) by group of IAP and significance of position's diff				p-value (IAP: baseline Vs 15 mmHg)	Correlation with IAP (all groups)
	Supine	9.1 (1.8)	p- valuea	15.0 (0.00)	p- valueb	NA	R	p-value
IAP	45 Degr	9.4 (2.2)		15.0 (0.00)		NA
GI	Supine	10.0 (3.6)		17.00 (3.8)		< 0.001	0.875	< 0.001
	45 Degr	10.8 (3.8)	0.713	16.6 (5.3)	0.531	< 0.001	0.843	< 0.001
Bladder	Supine	8.9 (2.9)		14.8 (3.9)		< 0.001	0.847	< 0.001
	45 Degr	9.2 (3.8)	0.686	13.3 (4.9)	0.326	< 0.001	0.819	< 0.001
MAP	Supine	87.0 (11)		104.0 (11.0)		< 0.01	0.634	< 0.001
	45 Degr	99.0 (20.0)	0.760	106.0 (14.0)	0.695	0.33	0.291	0.085
HR	Supine	75 (13)		75 (16)		0.71	0.184	0.284
	45 Degr	78 (17)	0.718	81 (17)	0.181	0.25	0.152	0.377
MIP	Supine	11 (2)		13 (3)		< 0.001	0.407	0.014
	45 Degr	10 (2)	0.788	12 (3)	0.021	< 0.001	0.447	0.006
PIP	Supine	27 (1)		31 (2)		< 0.005	0.777	< 0.001
	45 Degr	24 (3)	0.792	28 (3)	0.004	< 0.001	0.748	< 0.001
Tv	Supine	0.63 (0.1)		0.52 (0.1)		0.01	-0.495	0.002
	45 Degr	0.65 (0.1)	0.770	0.62 (0.1)	0.016	0.130	-0.366	0.028

p < 0.05 is considered statistically significant

^aBy comparing of correlations with IAP

^bBy Wilcoxon Signed Ranks Test