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. Author manuscript; available in PMC: 2017 Apr 1.
Published in final edited form as: Compr Psychiatry. 2016 Jan 22;66:104–112. doi: 10.1016/j.comppsych.2016.01.010

Table 3.

Within-Day Multilevel Models for Binge Eating and Purging Episodes.

Binge Eating Purging
Variables b (SE) t p b (SE) t p
Intercept 26.19 (1.26) 20.75 <.001 24.25 (1.34) 18.08 <.001
Negative Urgency 3.24 (1.80) 1.80 .08 1.28 (2.13) 0.60 .55
Hours prior to Episode 2.41 (0.25) 9.72 <.001 1.19 (0.22) 5.37 <.001
(Hours prior to Episode)2 0.32 (0.05) 6.45 <.001 0.12 (0.05) 2.67 .008
(Hours prior to Episode)3 0.01 (0.002) 4.98 <.0010 .004 (0.002) 1.79 .07
Hours prior to Episode × Negative Urgency −1.16 (0.32) −3.59 <.001 −0.69 (0.31) −2.20 .03
(Hours prior to Episode)2 × Negative Urgency −0.14 (0.06) −2.24 .03 −0.10 (0.06) −1.61 .11
(Hours prior to Episode)3 × Negative Urgency −0.004 (0.003) −1.23 .22 −0.004 (0.003) −1.32 .19
Hours following Episode −2.72 (0.27) −10.03 <.001 −1.28 (0.23) −5.65 <.001
(Hours following Episode)2 −0.31 (0.05) −6.39 <.001 −0.12 (0.05) −2.65 .008
(Hours following Episode)3 −0.01 (0.002) −4.99 <.001 −0.004 (0.002) −1.79 .07
Hours following Episode × Negative Urgency 1.21 (0.36) 4.29 .001 0.63 (0.32) 1.94 .05
(Hours following Episode)2 × Negative Urgency 0.14 (0.06) 2.64 .03 0.10 (0.06) 1.62 .11
(Hours following Episode)3 × Negative Urgency 0.004 (0.003) 1.23 .22 0.004 (0.003) 1.32 .19

Note: Episode = refers to binge eating or purging episode. Intercept = estimated value of negative affect at the time of the binge or purge event when negative urgency is 0 (i.e., the mean). Negative Urgency = estimated increase (or decrease) in the intercept for each one unit increase in negative urgency. Linear functions = rate of change in negative affect prior to and following binge eating or purging; Quadratic functions = acceleration in rate of change in negative affect prior to and following binge eating or purging; Cubic functions = further acceleration or dampening of the acceleration in rate of change in negative affect prior to and following binge eating or purging.