Table 1.

Demographic and clinical features

Patient No.	Gender	Age	Diagnosis
T1	M	35	T11-T12
T2	M	36	T7-10
T3	M	38	T2-T7
T4	M	40	T3-T5,T10-T11
T5	M	43	T9-L1
T6	M	47	T7-T11
T7	F	50	T9-T11
T8	M	50	T5-T7
T9	M	52	T4-T9
T10	F	52	T9-T11
T11	F	53	T3-T10
T12	F	54	T9-T11
T13	F	58	T2-T3
T14	F	58	T9-L1
T15	F	59	T5-L1
T16	M	59	T8-L5
T17	F	59	T1-T2
T18	F	60	T4-T5
T19	M	60	T2-T3
T20	M	61	T1-T3,T9-T12
T21	F	62	C4-T4
T22	M	65	T3-T4
T23	F	65	T3-T5
T24	F	65	T10-L1
T25	F	66	T9-T11
C1	M	59	–
C2	M	35	–
C3	M	40	–
C4	M	50	–
C5	M	59	–
C6	M	37	–
C7	F	50	–
C8	F	50	–
C9	F	41	–
C10	F	60	–
C11	M	62	–
C12	F	62	–
C13	M	45	–
C14	M	63	–
C15	F	65	–
C16	F	63	–
C17	F	37	–
C18	F	58	–
C19	M	64	–
C20	M	59	–
C21	F	51	–
C22	M	55	–
C23	F	61	–

T thoracic ossification of ligamentum flavum, C control