SI-6603: SI-6603 is administrated into the nucleus pulposus of the intervertebral disc

1.25 U, intradiscal injection, one time

A treatment-emergent adverse event (TEAE) was defined as an adverse event (AE) that began or that worsened in severity after the investigational drug had been administered. All AEs, including intercurrent illnesses and regardless of the relationship to investigational drug, occurring during the study were documented from the signing of the informed consent form until completion of final visit. Concomitant illnesses, which existed before entry into the study, were not considered AEs unless they worsened during the treatment period. All AEs, regardless of the source of identification (e.g., physical examination, laboratory assessment, or reported by patient), had to be documented.

Worst leg pain intensity during the past 24 hours assessed by Visual Analog Scale (VAS). Scores are recorded by making a handwritten mark on a 100 mm line that represents a continuum between "no pain" (0 mm) and "extreme pain" (100 mm).