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Table 2 Estimated differences between group means

From: Steroid injections added to the usual treatment of lumbar radicular syndrome: a pragmatic randomized controlled trial in general practice

Variable Estimated difference Standard error P |t| 95% CI - 95% CI +
RMDQ-score 2,5004 1,0435 0,0173 0,4551 4,5456
NRS back pain 1,1165 0,4389 0,0115 0,2562 1,9767
NRS leg pain 0,6717 0,5100 0,1890 -0,3279 1,6713
NRS pain during the day 0,6563 0,5186 0,2068 -0,3601 1,6727
NRS pain during the night 0,5285 0,4741 0,2659 -0,4007 1,4577
NRS total pain 0,6890 0,4729 0,1463 -0,2378 1,6158
NRS impairment 1,0254 0,4867 0,0361 0,0714 1,9793
  1. The differences between group means calculated by the mixed models analysis, over the entire course of the study period using linear regression. In this repeated measures regression analysis, differences between groups are calculated based on the study outcomes, corrected for baseline values, to estimate true values in the random population. We found significant differences between group means for RMDQ-score, NRS back pain score and NRS score for self-perceived impairment. These differences are statistically significant but too small to be considered clinically relevant.