Intercept correlation magnitudes over time are presented in Figure 2. Withdrawal/NA and craving intercepts were significantly and positively correlated at all time points (r range: 0.47 – 0.75, all p’s < 0.01). To test time trends in the magnitude of the between-subject correlations, a series of regressions were run predicting Fisher transformed correlation coefficients over time. Magnitude of correlation between craving and withdrawal/NA generally decreased over time (B = −0.058, t = −7.66, p < 0.001) such that a person’s level of withdrawal/NA was a stronger predictor of that person’s level of craving early after the last cigarette as compared to later in the night. This result may be due to relatively stable levels of withdrawal/NA and craving several hours after the last cigarette. Further, between-subject intercept growth parameters for PA and craving were significantly and negatively correlated at time points 2 hours or more after the last cigarette (r range: −0.362 – −0.423, p’s< 0.05). Overall, the association between a person’s level of craving and that person’s level of PA was found to increase in magnitude over the time
