Table 2a.

Descriptive statistics of study measures and analyses of their changes over 24 months, by group^a

	Baseline (mean ± SD)	Month 3 (mean ± SD)	Month 6 (mean ± SD)	Month 12 (mean ± SD)	Month 24 (mean ± SD)	Effect for timeb (F(4, 432) [η2p])	Time × group interaction (F(4, 432) [η2p])
Weight (kg)
Experimental	94.95 ± 11.44	92.03 ± 11.84	89.21 ± 11.57	89.40 ± 11.86	89.84 ± 13.58	26.25c [0.196]	6.84c [0.060]
Comparison	95.36 ± 10.56	94.46 ± 10.63	93.27 ± 10.44	93.51 ± 11.07	94.11 ± 11.23
Oxford CBTd	92.34 ± 8.81	NA	83.29 ± 10.39	84.33 ± 11.11	89.45 ± 11.48
Physical activity (METs/week)
Experimental	8.31 ± 7.30	28.65 ± 13.56	32.77 ± 15.47	32.44 ± 15.16	23.59 ± 15.15	89.01c [0.452]	9.50c [0.081]
Comparison	9.65 ± 8.14	23.51 ± 15.44	22.02 ± 12.82	23.20 ± 12.60	22.40 ± 12.26
Fruit and vegetable intake (servings/day)
Experimental	3.95 ± 1.97	5.81 ± 2.39	6.42 ± 2.14	6.23 ± 2.24	5.56 ± 1.90	38.92c [0.265]	4.55e [0.040]
Comparison	3.30 ± 1.81	4.25 ± 2.04	4.46 ± 2.23	4.73 ± 1.99	4.62 ± 1.98
Self-regulation for exercise
Experimental	22.53 ± 6.32	32.51 ± 4.36	33.04 ± 4.28	32.27 ± 4.59	29.87 ± 5.96	64.03c [0.372]	14.63c [0.119]
Comparison	23.07 ± 6.32	26.96 ± 6.12	26.58 ± 6.91	26.58 ± 6.75	26.56 ± 6.69
Self-efficacy for exercise
Experimental	25.87 ± 9.47	33.38 ± 10.08	34.98 ± 10.52	33.25 ± 11.73	29.36 ± 11.82	14.64c [0.119]	4.27e [0.038]
Comparison	22.36 ± 9.73	25.47 ± 10.89	25.29 ± 12.25	25.98 ± 11.22	25.49 ± 10.84
Total mood disturbance
Experimental	25.69 ± 15.45	9.17 ± 15.00	4.55 ± 11.54	7.96 ± 11.88	9.38 ± 13.87	53.56c [0.332]	8.62c [0.074]
Comparison	21.71 ± 11.50	12.25 ± 8.12	13.89 ± 11.50	12.78 ± 11.88	13.47 ± 11.51
Self-regulation for controlled eating
Experimental	23.75 ± 5.60	31.25 ± 4.57	32.51 ± 4.00	31.96 ± 4.19	29.82 ± 5.68	64.16c [0.373]	5.64c [0.050]
Comparison	22.05 ± 5.78	26.91 ± 5.54	26.78 ± 5.59	26.44 ± 5.23	26.29 ± 5.20
Self-efficacy for controlled eating
Experimental	87.82 ± 31.21	114.96 ± 26.95	126.48 ± 26.51	127.26 ± 26.90	124.69 ± 28.34	47.29c [0.305]	4.39e [0.039]
Comparison	88.24 ± 33.80	104.65 ± 27.17	108.00 ± 30.76	110.35 ± 30.45	108.18 ± 29.90

^aExperimental group, n = 55; comparison group, n = 55.

^bAnalysis of variance effects for time, and time × group interactions, contrast changes from baseline to month 24.

^cp < 0.001.

^dThese data were adapted from previous research²¹ for contrasting purposes.

^ep < 0.01.

CBT = Cognitive Behavioural Therapy; MET = metabolic equivalent; SD = standard deviation.