Effects of ultrasound monitoring of gastric residual volume on feeding complications, caloric intake and prognosis of patients with severe mechanical ventilation

Table 1 Baseline characteristics of participants: Comparisons of the 2 groups, n (%)

Item	< 250 mL (n = 451)	≥ 250 mL (n = 62)	t/χ2	P value
Gender			0.8022	0.371
Female	184 (40.8)	29 (46.8)
Male	267 (59.2)	33 (53.2)
Age (yr)	53.04 ± 3.9	53.92 ± 4.29	1.6521	0.099
BMI	20.39 ± 2.5	20.87 ± 2.49	1.4201	0.156
APACHE II	16.39 ± 2.44	16.71 ± 2.41	0.9821	0.327
SOFA	3.51 ± 0.53	3.47 ± 0.5	0.5871	0.557
Acute cerebrovascular accident	133 (29.5)	23 (37.1)	1.4902	0.222
Acute pneumonia	84 (18.6)	9 (14.5)	0.6202	0.431
Acute heart failure	122 (27.1)	14 (22.6)	0.5592	0.455
Craniocerebral injury	112 (24.8)	16 (25.8)	0.0282	0.868
Other	20 (4.4)	3 (4.8)	0.0212	0.885
Hypertension	271 (60.1)	45 (72.6)	3.5961	0.058
Diabetes	106 (23.5)	12 (19.4)	0.5302	0.467
Coronary heart disease	161 (35.7)	23 (37.1)	0.0462	0.830

¹Independent samples t test.

²Chi-square test.

BMI: Body mass index; APACHE II: Acute physiology and chronic health evaluation II; SOFA: Sequential organ failure assessment.