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Table 3 Risk (combined variable) for LBP lasting seven or more consecutive days after one year of follow-up (LBP at t1) in univariate analyses.

From: Physical characteristics of the back are not predictive of low back pain in healthy workers: A prospective study

   Asymptomatic workers Mildly symptomatic workers
    LBP at t1     LBP at t1   
   n % RR 95%CI P-value n % RR 95%CI P-value
Combined variable Normal 156 7.7 1.00   0.591 173 15.6 1.00   
  Abnormal 171 9.4 1.22 (0.60 – 2.49)   146 15.8 1.01 (0.61 – 1.68) 0.971
  1. P value calculated with Chi-square tests/RR = relative risk/95%CI = 95% confidence interval