Associations among workplace environment, self-regulation, and domain-specific physical activities among white-collar workers: a multilevel longitudinal study

Table 2 Multilevel correlations among worksite- and employee-level variables (Nj = 23, Ni = 547)

Variables	Mean (SD)	ICC [95% CI]	1	2	3	4	5	6	7	8	9	10	11	12
Worksite-level
1. Parking/Bike^a	1.28 (1.0)	–	1.00	−0.16	0.23	−0.22	−0.39	0.36*	−0.09	−0.47	0.31	−0.57	−0.14	−0.02
2. Signs/Bulletin boards/ Advertisements^a	1.15 (1.2)	–		1.00	−0.20	0.01	−0.15	−0.22*	0.49**	0.18	−0.36	−0.19	−0.07	0.02
3. Stairs/Elevator^a	0.74 (0.6)	–			1.00	−0.35*	0.30	0.28*	−0.23	−0.12	−0.59	0.10	0.16	0.53
4. Physical activity/ Fitness facilities^a	0.74 (1.7)	–				1.00	−0.40**	0.28	0.40	−0.04	0.33	0.22	−0.31	0.73*
5. Work rules^a	5.04 (0.8)	–					1.00	−0.28	−0.24	−0.07	−0.43	−0.22	−0.56*	−0.20
6. Written policies^a	0.26 (1.3)	–						1.00	0.18	0.51	0.32	−0.19	−0.12	0.61**
7. Health promotion analys^a	1.43 (1.9)	–							1.00	0.22	0.33	−0.02	−0.07	0.02
Employee-level
8. Self-regulation for physical activity^a	24.66 (10.1)	0.10* [.01, .19]								1.00	0.73	−0.36	0.54**	0.95**
9. Self-efficacy for physical activity^a	11.45 (3.6)	0.00 [−0.10, 0.10]								0.41**	1.00	0.27	0.73	0.97**
10. Occupational physical activity^b	3.38 (17.8)	0.10 [−0.03, 0.23]								0.08	0.05	1.00	−0.25	−0.23
11. Transport-related physical activity^b	9.31 (11.9)	0.15* [0.03, 0.26]								0.11**	0.17**	0.14	1.00	0.52*
12. Leisure-time physical activity^b	7.07 (13.0)	0.04 [−0.03, 0.10]								0.40**	0.34**	0.18	0.09*	1.00

Upper triangular matrix indicates worksite-level correlations, and lower triangular matrix indicates employee-level matrix. Nj the number of worksites, Ni the number of workers, ICC intra-class correlation coefficient, CI confidence interval. ^aAt baseline. ^bAt follow-up. *p < 0.05. **p < 0.01.

ISSN: 1479-5868