Intervening to reduce workplace sitting: mediating role of social-cognitive constructs during a cluster randomised controlled trial

Table 2 Effect of the SUV intervention on targeted social-cognitive constructs at 3 and 12 months (Path A)

		Mean change (SE)		Intervention effect (95% CI)^a	p
		Intervention	Control	Intervention effect (95% CI)^a	p
Perceived behavioural control	3 months^b	0.80 (0.09)	0.18 (0.06)	0.67 (0.40, 0.95)	<0.001
Perceived behavioural control	12 months^c	0.82 (0.14)	0.18 (0.10)	0.63 (0.23, 1.03)	0.002
Barrier self-efficacy	3 months^b	0.94 (0.07)	0.11 (0.09)	0.87 (0.58, 1.16)	<0.001
Barrier self-efficacy	12 months^d	0.78 (0.11)	0.21 (0.16)	0.54 (0.07, 1.00)	0.023
Perceived organisational norms	3 months^b	0.31 (0.05)	0.07 (0.03)	0.25 (0.10, 0.41)	0.001
	12 months^d	0.22 (0.08)	0.04 (0.07)	0.18 (−0.07, 0.43)	0.163
Knowledge	3 months^b	0.20 (0.05)	0.02 (0.07)	0.17 (−0.01, 0.36)	0.070
Knowledge	12 months^c	0.22 (0.05)	0.19 (0.08)	0.00 (−0.22, 0.23)	0.982

Note: For each construct, minimum score = 1 and maximum score =5. SE = standard error, CI = confidence interval. Mean change (SE) are calculated with linearized variance estimation. Significant effects are indicated in bold.
^aAdjusted for baseline values of the following potential confounders: workplace sitting (min/8 h), age (years), gender (men/women), Caucasian ethnicity (yes/no), current smoking (yes/no), body mass index (log-transformed), AQoL-8D physical superdomain score (log-transformed), AQoL-8D mental superdomain score (log-transformed), TV viewing time (log-transformed), job control category (high/low), weekly headaches (yes/no), musculoskeletal symptoms in the upper extremities (none/does not interfere with activities/interferes with activities)
^bIntervention: n = 110, Control: n = 76; ^c Intervention: n = 89, Control: n = 57 ^d Intervention: n = 88, Control: n = 57

ISSN: 1479-5868