Table 3.

Intervention details

Intervention characteristics	No (%)
Combined failure rate (grades I and II)	29 (20.0), 95% CI=(13.8 to 27.4)
Failure rate grade I	10 (18.2), 95% CI=(9.1 to 30.9)
Failure rate grade II	19 (21.1), 95% CI = (13.2 to 31.0)
Type of intervention
Operative splenectomy	11 (37.9)
Splenic embolization	18 (62.1)
Time to intervention (to arriving trauma institution)
<12 hours	20 (69.0)
12–23 hours	1 (3.4)
24–35 hours	4 (13.8)
36–48 hours	4 (13.8)
Indication for intervention
Hemodynamic instability	9 (31.0) (4 operative, 5 embolization)
Pseudoaneurysm	8 (27.6) (2 operative, 6 embolization)
Decrease in hemoglobin	4 (13.8) (0 operative, 4 embolization)
Hemoperitoneum	3 (10.3) (3 operative, 0 embolization)
Readmission with abdominal pain	1 (3.4) (0 operative, 1 embolization)
Unknown/ no indication given	4 (13.8) (2 operative, 2 embolization)

Data presented as absolute number with percentage in parentheses. Lower and upper limits of 95% CI presented for nonoperative management failure rates of grades I and II injuries.