Figure 3

Test for carryover effect. For the percentage change from baseline in the Brief Job Stress Questionnaire-Social Support (BJSQ-C), the intervention periods were grouped into NBIW and control and compared with a t test. The first and second periods of the control intervention showed no significant difference (p = 0.308), and the same was found for the first and second periods of the NBIW intervention (p = 0.335). Thus, no carryover effect was observed.