Slopes and intercepts portraying the effects of momentary pain severity (−1.5 SD, mean, 1.5 SD) on the momentary relations between day-mean centered stress and illicit opioid craving. Note. The original scale of the y-axis ranges from 1 to 5. A significant positive association between momentary stress and opioid craving when the level of momentary pain severity was 1.5 SD above the day mean (B = .08, SE = .03, p = .014, 95% CI = .02, .15). The association between momentary stress and opioid craving was marginally significant at its day mean (B = .05, SE = .03, p = .074, 95% CI = −.01, .11). The association between momentary stress and opioid craving was not statistically significant when momentary pain severity was 1.5 SD below the mean (B = .03, SE = .03, p = .44, 95% CI = −.04, .09).