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Table 3 Association between pain measures and belonging to a specific subgroup compared to Subgroup 1

From: The association between subgroups of MRI findings identified with latent class analysis and low back pain in 40-year-old Danes

  Odds ratio 95% CI p-value
All five levels in Subgroup 1 versus a minimum of one level in Subgroup 5
 LBP past month 2.5 0.8–9.0 0.15
 LBP past year 11.3 1.6–495 0.01
 Non-trivial LBP 5.4 1.5–19.6 0.01
All five levels in Subgroup 1 versus a minimum of one level in Subgroup 4 but no levels in Subgroup 5
 LBP past month 1.0 0.5–1.9 1.00
 LBP past year 3.0 1.5–5.9 0.00
 Non-trivial LBP 1.4 0.6–3.5 0.53
All five levels in Subgroup 1 versus a minimum of one level in Subgroup 4 or 5
 LBP past month 1.1 0.6–2.1 0.82
 LBP past year 3.4 1.7–7.0 0.00
 Non-trivial LBP 1.8 0.8–4.2 0.18
All five levels in Subgroup 1 versus a minimum of one level in Subgroup 2 but no levels in Subgroup 4 or 5
 LBP past month 0.8 0.5–1.5 0.58
 LBP past year 1.2 0.7–2.2 0.53
 Non-trivial LBP 1.0 0.5–2.5 1.00
All five levels in Subgroup 1 versus a minimum of one level in Subgroup 3 but no levels in Subgroup 4 or 5
 LBP past month 1.0 0.4–2.5 1.00
 LBP past year 1.6 0.6–4.5 0.45
 Non-trivial LBP 1.7 0.5–5.5 0.48
All five levels in Subgroup 1 versus a minimum of one level in Subgroup 6 but no levels in Subgroup 3, 4 or 5
 LBP past month 0.5 0.2–1.4 0.21
 LBP past year 1.1 0.4–2.8 1.00
 Non-trivial LBP 0.6 0.1–2.5 0.68
All five levels in Subgroup 1 versus a minimum of one level in Subgroup 3 or 6 but no levels in Subgroup 4 or 5
 LBP past month 0.7 0.3–1.5 0.42
 LBP past year 1.3 0.6–2.8 0.61
 Non-trivial LBP 1.1 0.4–3.1 1.00
  1. Association between each of the three pain measures for people having a motion segment belonging to specific subgroups compared to people having all five lumbar segments in Subgroup 1 (representing no or few findings). Statistically significant odds ratios are italicised