Effect of intra-abdominal pressure on respiratory function in patients undergoing ventral hernia repair

Table 2 Agreement between the two techniques of intra-abdominal pressurе measurement

	Number of patients	Mean intra-abdominal pressure	Correlation analysis		Bland–Altman analysis
			r	P	bias	Precision
After tracheal intubation	29	7.83	0.65	0.002	-1.06	4
After ventral hernia repair	28	9.22	0.73	0.001	-0.57	2.8
At the end of surgery	26	8.91	0.75	0.001	-0.46	4.1
During spontaneous breathing through the end of tracheal tube (spontaneous breathing trial)	23	11.48	0.75	0.002	-0.19	3.6
At 1 h after tracheal extubation	27	9.7	0.81	0.001	-1.00	3.3