Table 3. 30-day post-operative outcomes and operative details for patients undergoing release of tethered cord.

Outcomes	Males (N=1,768)	Females (N=1,914)	P value	Total (N=3,682)
Readmission	94 (5.3)	122 (6.4)	0.1726	216 (5.9)
Reoperation	44 (2.5)	57 (3.0)	0.3637	101 (2.7)
Death in 30 days	1 (0.1)	0	0.4802	1 (<0.1)
Use of operating microscope	492 (27.8)	513 (26.8)	0.4852	1005 (27.3)
Mean length of operation in minutes (±SD)	100.5 (±78.3)	102.4 (±74.7)	0.4585	101.5 (±76.4)
Mean days from operation to discharge (±SD)	2.6 (±2.1)	2.8 (±3.2)	0.0110	2.7 (±2.7)
Any complication	118 (6.7)	180 (9.4)	0.0024	298 (8.1)
Surgical site infections
Superficial incisional SSI	29 (1.6)	50 (2.6)	0.0420	79 (2.1)
Deep incisional SSI	12 (0.7)	10 (0.5)	0.5387	22 (0.6)
Organ/space SSI	5 (0.3)	2 (0.1)	0.2715	7 (0.2)
Wound disruption
Superficial wound disruption/dehiscence*	48 (3.1)	66 (4.0)	0.1771	114 (3.1)
Deep wound disruption	21 (1.2)	30 (1.6)	0.3248	51 (1.4)
Respiratory
Unplanned intubation	2 (0.1)	2 (0.1)	1.0000	4 (0.1)
Pneumonia	2 (0.1)	1 (0.1)	0.6106	3 (0.1)
Renal
Urinary tract infection	14 (0.8)	46 (2.4)	0.0001	60 (1.6)
Progressive renal insufficiency	1 (0.1)	0	0.4802	1 (<0.1)
Neurologic
Seizure	3 (0.2)	2 (0.1)	0.6759	5 (0.1)
CVA/Stroke or Intracranial Hemorrhage	2 (0.1)	0	0.2305	2 (0.1)
Coma > 24 hours	1 (0.1)	0	0.4802	1 (<0.1)
Nerve injury	1 (0.1)	0	0.4802	1 (<0.1)
Cardiovascular and hematologic
Bleeding requiring transfusion	5 (0.3)	8 (0.4)	0.4897	13 (0.4)
Cardiac arrest requiring CPR	1 (0.1)	0	0.4802	1 (<0.1)
Vein thrombosis requiring therapy	1 (0.1)	1 (0.1)	1.0000	2 (0.1)
Nonsurgical site infections
Systemic sepsis	10 (0.6)	5 (0.3)	0.1474	15 (0.4)
C. Difficile infection**	1 (<0.1)	2 (0.1)	0.6242	3 (0.2)
Septic shock***	1 (0.1)	1 (0.1)	1.0000	2 (0.1)
Central line associated bloodstream infection	1 (0.1)	0	0.4802	1 (<0.1)

*Of available data n=3,223; **Of available data n=1,777; ***Of available data n=3,223.