Table 3. Characteristics of misplaced screws.

Screw	Vertebral level	Size and direction	Screw angle	Pedicle angle	Difference in angle
3	Rt L4	4 mm Lat, 1 mm Sup	14	11	3
12	Rt S1	5 mm Lat	3	15	2
14	Rt L5	1 mm Sup	23	20	3
74	Rt L4	2 mm Lat	22	18	4
148	Rt L5	5 mm Med	24	17	7
156	Lt T3	2 mm Lat	8	15	7
157	Rt T3	2 mm Med	25	12	13
158	Lt T5	2 mm Lat	11	15	3
160	Lt T6	2 mm Lat	9	10	1
199	Rt L3	4 mm Lat	17	19	2
201	Rt L4	3 mm Lat, 5 mm Sup	14	18	4
265	Rt T10	1 mm Lat	13	12	1
285	Rt T6	4 mm Lat	14	16	2
286	Rt T7	4 mm Lat	19	20	1
287	Lt T9	2 mm Lat	12	13	1
289	Lt T10	2 mm Lat	8	10	2
290	Rt T10	2 mm Lat	6	9	3
292	Rt T11	2 mm Lat	13	14	1
337	Lt L1	2 mm Lat	12	14	2
367	Lt L4	1 mm Lat, 4 mm Sup	15	17	2
375	Lt L5	3 mm Sup	24	24	0
378	Rt L2	2 mm Lat	7	11	4
385	Lt S1	3 mm Med	8	17	9
573	Rt L2	4 mm Lat	15	12	3
606	Lt L3	2 mm Lat	36	30	6

Direction of misplacement: Lat, lateral; Med, medial; Sup, superior.