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Table 6 Predicted means and 95% confidence intervals of the Perceived Stress Scale (PSS) for the treatment groups over time.

From: An adaptogenic role for omega-3 fatty acids in stress; a randomised placebo controlled double blind intervention study (pilot) [ISRCTN22569553]

  Control Placebo Fish oil
Time 1    
Mean 15.836 23.929 23.938
95% CI sep 1.203 2.555 2.390
95% CI joint 1.716 3.645 3.409
Time 2    
Mean 15.337 20.643* 17.379*
95% CI sep 1.416 2.725 2.455
95% CI joint 2.021 3.888 3.502
  1. Note: 95% CI sep = 95% confidence interval considering each item separately, 95% CI joint = 95% confidence interval, considering the estimates of the three treatment groups collectively. *denotes significant difference from baseline (p < 0.05).