Table 3

Hardware failure (21 patients)—2-y follow-up.

Mode of Failure	n	Women	Men
Broken screw	2	1	1
Screw loosening	5	3	2
Symptomatic hardware prominence	6	4	2
Set Screw loosening	4^{^a}	2	2
Rod fractures^{^c}	6^{^b}	4	2
Total	23	14	9

↵a Three of the set screw loosenings were asymptomatic. No revision required.
↵b Five rod fractures were asymptomatic with solid fusion on computed tomography scan. No revision.
↵c One male patient had symptomatic T12- L1 and L5-S1 nonunion with bilateral distal rod fractures, iliac set screw loosening, and proximal T12 screw loosening.