What are the working mechanisms of a web-based workplace sitting intervention targeting psychosocial factors and action planning?

Table 3 Main association test, action theory tests and conceptual theory tests^a

Main association test: association between intervention and workplace sitting
	τ (SE)	95% CI	p
	−1.105 (0.376)	−1.871, −0.404^*	0.002
Action theory tests: association between intervention and potential mediators
Potential mediators	α (SE)	95% CI	p
Knowledge	0.132 (0.062)	0.006, 0.252^*	0.040
Attitudes	0.030 (0.083)	−0.112, 0.197	0.724
Self-efficacy	−0.044 (0.112)	−0.259, 0.176	0.680
Social support	0.230 (0.192)	−0.152, 0.622	0.231
Intention	−0.325 (0.174)	−0.667, 0.023	0.059
Conceptual theory tests: association between potential mediators and workplace sitting
Potential mediators	β (SE)	95% CI	p
Knowledge	−0.327 (0.469)	−1.262, 0.599	0.466
Attitudes	−0.569 (0.340)	−1.263, 0.040	0.097
Self-efficacy	0.044 (0.237)	−0.443, 0.503	0.845
Social support	−0.100 (0.165)	−0.417, 0.196	0.563
Intention	0.091 (0.217)	−0.384, 0.497	0.657

CI confidence interval
^aadjusted for the cluster variable, age, gender, education, work hours, work duration, BMI, walking, moderate physical activity, vigorous physical activity, respective baseline value; coefficients results from analyses on the transformed sitting outcome
^* p < 0.05

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