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Table 2 Lower Back Pain (as measured by the MPQ-SF): estimated marginal means for baseline and eighteen weeks by group and estimated change within and between groups

From: The effect of a sports chiropractic manual therapy intervention on the prevention of back pain, hamstring and lower limb injuries in semi-elite Australian Rules footballers: a randomized controlled trial

Variable Baseline 18 weeks Δ within groups Δ between groups
   intervention control intervention control intervention control mean p-value
Current mean 33.26 32.71 21.44 34.36 -11.81 1.64 -13.46 .026
  95% CI 24.00, 42.52 23.62, 41.81 12.77, 30.12 25.84, 42.88 -22.90, -0.73 -8.8, 12.14 -28.35, 1.44  
Overall mean 26.67 22.86 17.04 27.86 -9.63 5.00 -14.63 .006
  95% CI 20.54, 32.80 16.84, 28.88 10.67, 23.41 21.60, 34.11 -16.35, -2.91 -3.07, 13.07 -24.93, -4.33 (.034)1
Sensory mean 12.57 15.26 13.02 18.20 0.45 2.94 -2.49 .461
  95% CI 8.56, 16.59 11.32, 19.20 8.02, 18.03 13.29, 23.11 -3.67, 4.57 -2.54, 8.43 -9.24, 4.25  
Affective mean 4.95 4.76 8.33 10.72 3.38 5.96 -2.58 .411
  95% CI 1.78, 8.12 1.65, 7.87 3.96, 12.70 6.43, 15.01 -0.73, 7.48 1.07, 10.85 -8.84, 3.6  
Total mean 10.53 12.56 11.81 16.19 1.28 3.63 -2.35 .436
  95% CI 7.0, 14.06 9.10, 16.02 7.24, 16.38 11.70, 20.67 -2.57, 5.12 -1.14, 8.40 -8.36, 3.66  
  1. * Bold type face indicates significant difference between groups at 18 weeks.
  2. 1 Regression analysis showed a significant difference between groups: p-value calculated using regression analysis.