Fig. 2From: Salivary cortisol in post-traumatic stress disorder: a systematic review and meta-analysisSalivary cortisol effect size. Salivary cortisol effect size (SMD) for studies examining in the morning (am), afternoon (pm), before 2007, and after 2007 levels in PTSD and control groups. PTSD,posttraumatic stress disorder; am, morning (before 12 pm); pm, afternoon (after 12 pm);<2007,before 2007;≥2007, after 2007;*p < 0.05Back to article page