Prediction of the Clinical Outcomes of Sigmoid Volvulus by Abdominal X-Ray: AXIS Classification System

Table 2

Associations between AXIS classification and clinical outcomes.

Outcome	AXIS classification
	Group A; (%)	Group B; (%)	Group C; (%)	for trend
Severe sigmoid volvulus^†
No	34 (85.0)	16 (69.6)	0 (0)	0.003
Yes	6 (15.0)	7 (30.4)	3 (100)
Necrosis
No	36 (90.0)	19 (82.6)	0 (0)	0.004
Yes	4 (10.0)	4 (17.4)	3 (100)
Need for surgery
No	35 (87.5)	17 (73.9)	0 (0)	0.003
Yes	5 (12.5)	6 (26.1)	3 (100)
30-day mortality
No	40 (100)	22 (95.7)	3 (100)	0.334
Yes	0 (0)	1 (4.3)	0 (0)
Length of stay, day (±SD)	9.53 ± 10.2	15.4 ± 25.7	16.3 ± 7.4	0.095

^†Defined as any of intestinal necrosis, need for surgery, and 30-day mortality rate. Bold values indicate statistical significance (). Abbreviation: SD: standard deviation.