Table 6.

Summary of mediation effects for physical activity in women

Mediator	Longitudinal mediation: Δ in mediators from baseline to 6 months predicting Δ in PA from 6 to 24 months				Contemporaneous mediation: Δ in mediators from baseline to 24 months predicting Δ in PA from baseline to 24 months
	α coefficient (SE)	β coefficient (SE)	α β	Asymmetric confidence limit	α coefficient (SE)	β coefficient (SE)	α β	Asymmetric confidence limit
Cons of exercise
Single-mediator model	−0.019 (0.079)	0.012 (0.010)	−0.000	−0.002, 0.002	−0.061 (0.085)	−0.018 (0.009)	0.001	−0.002, 0.005
Multiple-mediator model		0.019 (0.011)	−0.000	−0.004, 0.003		−0.005 (0.011)	0.000	−0.001, 0.002
Pros of exercise
Single-mediator model	0.099 (0.091)	0.003 (0.009)	0.000	−0.002, 0.003	−0.061 (0.104)	0.012 (0.008)	−0.001	−0.004, 0.002
Multiple-mediator model		−0.001 (0.011)	−0.000	−0.003, 0.002		0.005 (0.010)	−0.000	−0.002, 0.001
Barriers efficacy
Single-mediator model	−1.443 (1.995)	0.000 (0.000)	−0.001	−0.003, 0.001	3.974 (2.438)	0.002 (0.000)	0.008	−0.001, 0.018
Multiple-mediator model		0.001 (0.001)	−0.001	−0.008, 0.003		0.001 (0.000)	0.004	−0.001, 0.011
Performance efficacy
Single-mediator model	3.325 (3.055)	−0.000 (0.000)	−0.000	−0.002, 0.002	3.816 (3.341)	0.001 (0.000)**	0.004	−0.003, 0.011
Multiple-mediator model		−0.000 (0.000)	−0.000	−0.003, 0.002		0.001 (0.000)*	0.004	−0.002, 0.003
Cognitive processes of change
Single-mediator model	0.036 (0.068)	0.007 (0.012)	0.000	−0.001, 0.002	0.051 (0.071)	0.027 (0.011)*	0.001	−0.002, 0.006
Multiple-mediator model		0.006 (0.015)	0.000	−0.001, 0.002		0.031 (0.015)*	0.002	−0.003, 0.007
Behavioral processes of change
Single-mediator model	0.274 (0.071)**	0.007 (0.011)	0.002	−0.004, 0.008	0.248 (0.080)**	0.038 (0.010)**	0.009	0.003, 0.018a
Multiple-mediator model		0.009 (0.016)	0.002	−0.006, 0.012		0.002 (0.016)	0.000	−0.007, 0.009

^aSignificant mediator

^*p<0.05

^**p<0.01