Table 1. Demographic data of total 34 patients.

Variable	No. of patients
Gender
Male	22
Female	12
Diagnosis
Primary spondylodiscitis	28
Psoas abscess	15
Postop infection (instrumented)	5
Mixed infection	1
Operation level of FEDD
T11/T12	1
L1/L2	4
L2/L3	8
L3/L4	15
L4/L5	13
L5/S1	1

FEDD, full-endoscopic debridement and drainage.