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Table 2 The association between L4-S1 disk protrusion and lifetime cumulative lifting load in male participants

From: The roles of lumbar load thresholds in cumulative lifting exposure to predict disk protrusion in an Asian population

Lifetime cumulative lifting load (Newton-hr)nDisk protrusion at lower disk level (L4-S1)
AOR
Only lift load above 4000 N was includedLow01371
Intermediate0~ < 4.0 × 106581.6 (0.8–3.1)
High> 4 × 106571.9 (1.0–3.8)
Only lift load above 3400 N was includedLow0961
Intermediate0~ < 4.0 × 106731.6 (0.8–3.3)
High> 4 × 106832.0* (1.0–3.9)
Only lift load above 3000 N was includedLow< 2.5 × 105841
Intermediate2.5 × 105 ~ < 5.6 × 106832.9*** (1.4–6.2)
High>  5.6 × 106853.1** (1.5–6.7)
lift load above 0 N was includedLow<  1.8 × 106831
Intermediate1.8 × 106~ <  1.6 × 107842.3* (1.2–4.9)
High>  1.6 × 107852.0 (1.0–4.2)
  1. Adjusted for age, BMI, smoking
  2. Statistically significant: *, P < .05; **, P < .01; ***, P < .001