|1. Peripheralization with extension movement||
Presence of peripheralization with at least one of the following extension movements during the baseline examination: single extension standing, repeated extension standing, sustained extension prone (prone on elbows), or repeated extension prone (prone press-ups).|
Peripheralization is judged to have occurred if a pain or paresthesia moves distally away from the spine toward the periphery, or paresthesia or a neurological sign is worsened or produced during or after the movement .
|2. Positive crossed straight leg raise test||Reproduction of familiar symptoms in the symptomatic lower extremity with passive straight leg raising of the unaffected leg at an angle of 70° or less .|
Positive Sub-Grouping Status (SG+): Either criterion 1 or 2 is present (or both are present)|
Negative Sub-Grouping Status (SG-): Both criterion 1 and 2 are absent