Table 3.

Within- and between-subjects associations between negative affect and engaging in a bout of MVPA

	Average affect				Variability in affect
	Estimate	SE Estimate	z-value	p-value	Estimate	SE Estimate	z-value	p-value
Engaging in a bout of MVPA
Intercept	2.21	0.17	13.01	<.001	−0.61	0.80	−0.76	.45
BMI	−0.01	0.003	−1.55	.12	−0.01	0.01	−0.87	.38
Sex	0.03	0.05	0.54	.59	0.19	0.22	0.87	.38
Age	−0.001	0.002	−0.71	.48	−0.01	0.01	−1.62	.11
Treatment condition	−0.06	0.04	−1.69	.09	−0.20	0.16	−1.27	.20
Weekend	−0.06	0.01	−5.12	<.001	−0.12	0.07	−1.69	.09
Accelerometer wear time	0.004	0.003	1.19	.24	0.05	0.02	2.80	.005
Surveys completed	−0.01	0.004	−2.47	.01	−0.05	0.03	−1.86	.06
Dietary lapses	0.00	0.01	−0.06	.95	0.10	0.04	2.53	.01
BS MVPA	−0.18	0.06	−3.11	.004	−0.64	0.28	−2.29	.02
WS MVPA	−0.01	0.01	−0.98	.33	0.08	0.08	0.99	.32
Time spent in MVPA
Intercept	2.29	0.18	12.54	<.001	−0.67	0.82	−0.81	.42
BMI	−0.01	0.003	−1.42	.16	−0.01	0.01	−0.74	.46
Sex	−0.01	0.05	−0.21	.84	0.13	0.22	0.57	.57
Age	−0.003	0.003	−1.40	.16	−0.01	0.01	−1.65	.10
Treatment condition	−0.05	0.04	−1.42	.16	−0.17	0.16	−1.06	.29
Weekend	−0.06	0.01	−5.26	<.001	−0.12	0.07	−1.71	.09
Accelerometer wear time	0.003	0.003	0.99	.32	0.05	0.02	2.56	.01
Surveys completed	−0.01	0.004	−2.33	.02	−0.04	0.03	−1.48	.14
Dietary lapses	0.00	0.01	0.03	.97	0.09	0.04	2.43	.02
BS MVPA	−0.003	0.001	−2.76	.006	−0.01	0.01	−2.33	.02
WS MVPA	0.00	0.00	−1.63	.10	0.001	0.002	0.60	.55

Note. Models evaluating mean affect included random intercept effects; models evaluating MSSD included random intercept and slope effects.