Fig. 1
From: Impact of surgery after injury on SDNN and posttraumatic stress disorder development over two years
Individual and interactive modifying associations of SDNN and post-injury surgical intervention status with any posttraumatic stress disorder (PTSD) over 2-years in 538 patients with physical injuries. aOdds ratios (95% confidence intervals) were calculated using binary logistic regression; binteractive modifying associations were estimated using multinomial logistic regression between higher (> 22 ms) vs. lower (≤ 22 ms) SDNN and/or received vs. not received post-injury surgical interventions at baseline on development of any PTSD over 2-years, adjusted for age, sex, education, previous psychiatric disorders, previous traumatic events, number of physical disorders, scores on Hamilton Depression Rating Scale, and heart rate. *P < 0.05.
