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Table 3 Results of linear regression models fitted at each separate time point on the IBS Symptom Severity Score

From: Acupuncture for irritable bowel syndrome: primary care based pragmatic randomised controlled trial

Variable Baseline Mean (SD) Month 3 (95% CI) Month 6 (95% CI) Month 9 (95% CI) Month 12 (95% CI)
Primary analysis: IBS Symptom Severity Score      
Acupuncture group 280.00 (81.34) 213.78 (199.31 to 228.25) 201.60 (186.08 to 217.12) 206.40 (190.39 to 222.41) 209.79 (194.56 to 225.03)
Usual care group 277.17 (71.50) 241.21 (225.69 to 256.73) 224.19 (207.91 to 240.48) 233.40 (217.21 to 249.59) 231.12 (214.81 to 247.44)
Between group differences in means (acupuncture-usual care) - −27.43 (−48.66 to −6.21) −22.59 (−45.11 to −0.08) −27.00 (−49.77 to −4.23) −21.33 (−43.66 to 1.00)
  1. At each time point, predicted means and their 95% confidence intervals from the fitted model are presented except at baseline where the raw means and their standard deviation are presented.