Table 1.

Classification of low back pain grade

Grade	Scoring	Interpretation
0	No pain, no disability	No chronic pain
I	PI < 50; DP <3	Low pain intensity/low disability
II	PI ≥ 50; DP < 3	High pain intensity/low disability
III	DP = 3–4	High disability/moderately limiting
IV	DP = 5–6	High disability/severely limiting

Abbreviations: PI, pain intensity; DP, disability points