Figure 2
Assessment of stress with the Brief Job Stress Questionnaire. The Brief Job Stress Questionnaire (BJSQ), simplified version for primary outcome of mental stress, consists of 23 questions and was scored separately for the 3 stress categories. The graph shows the rate of change in scores from baseline (minus SD) on the vertical axis. A: control, − 13.92 (− 14.13); NBIW, − 16.32 (− 11.92). B: control, − 18.96 (− 17.03); NBIW, − 24.08 (− 10.53). C: control, − 4.14 (− 11.25); NBIW − 11.11 (− 15.08). N = 50 (control, n = 25; NBIW, n = 25). *p < 0.05 tested by paired t test. #: Parameters with significant changes from baseline (p < 0.05; tested by Wilcoxon rank sum test). NBIW, neutral bicarbonate ionized water.
