Changes in continuous symptom and physiological and neuroendocrine measures between groups from pre- to post-intervention will be evaluated by longitudinal analyses using linear mixed models.
Comparisons were made pre- to post-intervention, or between intervention and control arms.
Analysis of covariance (ANCOVA) was conducted to evaluate pre- and post-intervention changes, controlling for participants' ethnicity, age, and income level.
Additionally, the pre- and post-intervention test was not validated.
Therefore, two analyses were used to evaluate pre-intervention and post-intervention concentrations of PCBs in indoor air.
Anonymous, blinded judges evaluated pre- and post-intervention oral presentations of 10 randomly selected students on a 7-item instrument (Fig. 4).
Across these three interventions, we found a shift from pre to post treatment with increased parasympathetic and decreased sympathetic activity.
The Wilcoxon signed-rank test was used to evaluate the differences between pre- and post-intervention self-rated pain and per cent disability on the ODI scores.
3 Consider figure 3, where we have included regression lines for the pre-intervention and post-intervention data from figure 2. During the pre-intervention period, readmission rates steadily increased, but the trend shifted after the intervention.
The pre-intervention and post-intervention periods were defined as April 1 , 2012 to March 31 , 2013pre-intervention) and May 1 , 2013to April 30 , 2014(post-intervention).
To evaluate the degree of change pre- and post-intervention, the differences in means between continuous variable values at baseline and post-intervention are adjusted for the size effect.
