Table 3. Stratified analysis of characteristics and interaction modifiers.

Characteristics	N	Intolerance [OR (95% CI)]	P value	P value of interaction
Age				0.0216*
<65	69	2.0 (1.2, 3.3)	0.0053*
≥65	63	8.8 (2.5, 31.0)	0.0007*
APACHE II tertile				0.0716
Low	41	5.1 (1.3, 20.2)	0.0197*
Middle	46	4.7 (1.7, 13.0)	0.0029*
High	45	1.5 (0.8, 2.8)	0.2399
SOFA tertile				0.5888
Low	44	4.3 (1.4, 13.9)	0.0135*
Middle	32	2.7 (0.8, 9.8)	0.1190
High	56	2.2	0.0078*
MV				0.8573
Non-MV	20	1.7 (0.0, 141.7)	0.8252
MV	112	2.5 (1.5, 4.1)	0.0003*
Feeding way				0.9345
Jejunal tube	27	2.6 (0.7, 9.3)	0.1328
Gastric tube	105	2.8 (1.6, 4.8)	0.0003*
EN total tertile				0.8595
Low	44	2.6 (1.1, 6.3)	0.0313*
Middle	1	0.0	0.9929
High	87	2.9 (1.5, 5.5)	0.0010*
Abdomen disease				0.7677
No	86	2.6 (1.5, 4.6)	0.0008*
Yes	46	3.1 (1.2, 8.0)	0.0206*
EN speed tertile				0.5475
Low	30	2.6 (1.0, 7.0)	0.0483*
Middle	55	4.0 (1.6, 10.2)	0.0036*
High	47	2.1 (1.1, 4.1)	0.0306*

*, P<0.05. Continuous variables were divided in to three grade groups as low, middle and high. MV, mechanical ventilation; EN, enteral nutrition.