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Table 1 Criteria for the JOA scoring system

From: Endoscopic decompression for intraforaminal and extraforaminal nerve root compression

Subjective symptoms (9 points)  
   low-back pain  
none 3
occasionally mild 2
always present of sometimes sever 1
always sever 0
   leg pain &/or numbness  
none 3
occasionally mild 2
always present or sometimes sever 1
always sever 0
   walking ability  
normal walking 3
able to walk > 500 m, pain/numbness/weakness present 2
unable to walk 500 m due to pain/numbness/weakness 1
unable to walk 100 m due to pain/numbness/weakness 0
objective finding (6 points)  
   straight leg raising  
normal 2
30-70 degree 1
< 30 degree 0
   sensory function  
normal 2
mild sensory disturbance 1
apparent sensory disturbance 0
   motor function  
normal (MMT normal) 2
slight decrease muscle strength (MMT good) 1
marked weakness (Grade 3-0) 0
restriction of ADLs (14 points) †  
none 2
moderate 1
severe 0
bladder function (-6 points)  
normal 0
mild dysuria -3
severe dysuria -6
total score 29
  1. * ADL = activities of daily living; MMT = manual muscle testing.
  2. † ADL include the following; turning over while lying down, standing, washing one's face, leaning forward, ability to sit for approximately 1 hour, ability to lift or hold heavy objects, and ambulatory ability.