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Table 5 Patterns of reporting LBP at 41 and 45 as risks of LBP at 49

From: Individual courses of low back pain in adult Danes: a cohort study with 4-year and 8-year follow-up

LBP History LBP at 49 years of age Probability of LBP at 49 given ‘history’ Probability ratio with the no-no group as reference
  LBP 41 LBP 45 OR [95% CI] %  
‘year’ yes yes 8.9 [4.3;18.3] 84 2.28
no yes 3.3 [1.5;7.6] 66 1.80
yes no 2.6 [1.1;6.1] 60 1.63
no no 1.0 37 1.00
‘month’ yes yes 5.9 [3.1;11.2] 64 2.76
no yes 2.4 [1.2; 4.7] 42 1.82
yes no 2.5 [1.2;5.3] 43 1.85
no no 1 .0 23 1.00
‘>30 days/year’ yes yes 9.5 [4.5;20.2] 58 4.60
no yes 5.1 [2.2;11.6] 42 3.35
yes no 4.0 [1.5;10.5] 36 2.91
no no 1.0 13 1.00
‘seeking care’ yes yes 17.6 [6.9;45.4] 84 3.70
no yes 3.0 [1.5;6.0] 47 2.05
yes no 2.0 [0 .9;4.1] 37 1.61
no no 1 .0 23 1.00
‘non-trivial’ yes yes 18.4 [7.2;46.9] 69 6.35
no yes 5.0 [2.1;11.8] 38 3.48
yes no 3.1 [1.0; 9.6] 28 2.55
no no 1.0 11 1.00
  1. Patterns of LBP at the ages of 41 and 45 (columns 2 and 3) as risk factors of LBP at age 49 (column 4). OR = odds ratios with 95% confidence intervals (CI), the probability of being in the subgroup as percentage (%) and the probability ratio with the no-no group