Table 3.

Distribution of screw positions in the fluoroscopy group

Level	Total screws	Correctly placed	Minor perforation <2 mm	Displaced
				2–<4 mm lateral	2–<4 mm medial	≥4 mm lateral	≥4 mm medial
Th1	4	2	0	1	0	1	0
Th2	6	1	2	1	2	0	0
Th3	11	0	4	4	2	1	0
Th4	14	4	0	5	4	0	1
Th5	60	16	12	18	12	2	0
Th6	46	14	8	12	10	1	1
Th7	84	34	16	14	16	3	1
Th8	71	22	7	22	14	4	2
Th9	85	24	11	23	21	5	1
Th10	72	35	19	12	3	2	1
Th11	75	60	11	2	1	1	0
Th12	80	65	9	1	2	2	1
Total thoracic screws	608	277	99	115	87	22	8
		376		232
L1	199	170	25	2	1	1	0
L2	208	151	52	1	2	2	0
L3	240	198	33	3	2	2	2
L4	268	204	52	4	6	1	1
L5	287	162	89	12	13	8	3
S1	192	98	75	2	12	3	2
Total lumbosacral screws	1,394	983	326	24	36	17	8
		1,309		85
Total screws	2,002	1,685		317