Table 1.

Summary of exclusion criteria resulting in subject conversion to non-trial group

Inclusion criteria	Proportion excluded: % (n/164)
6 weeks conservative care	<6 weeks conservative care: 51.2% (84/164)
ODI and/or VAS leg ≥40	ODI <40: 25.6% (42/164) VAS leg <40: 7.9% (13/164)
Primary discectomy	Subsequent discectomy/recurrence: 14.0% (23/164)
Defect width ≥6 mm and ≤10 mm	<6 mm: 1.8% (3/164) >10 mm: 9.1% (15/164)
Defect height ≥4 mm and ≤6 mm	<4 mm or >6 mm: 6.7% (11/164)
Posterior disc height ≥5 mm	<5 mm: 4.9% (8/164)
Age ≥21 years and ≤75 years	<21 years: 2.4% (4/164) >75 years: 0.6% (1/164)

Abbreviations: ODI, Oswestry disability Index; VAS, visual analog scale.