Factors related with public open space use among adolescents: a study using GPS and accelerometers

Table 4 Associations between individual and social environmental factors with sedentary time, LPA and MVPA spent in POS

Individual factors	Gamma model sedentary time		Gamma model LPA		Gamma model MVPA
Individual factors	Exp. B	95% CI	Exp. B	95% CI	Exp. B	95% CI
Gender (ref = male)	0.89	0.63–1.27	0.73	0.53–1.00	0.57**	0.41–0.80
Education (ref = general)
Vocational	1.43	0.85–2.40	0.71	0.42–1.19	0.74	0.44–1.24
Technical	1.11	0.62–2.00	0.93	0.51–1.67	0.72	0.40–1.29
Age	1.08	0.91–1.29	0.98	0.82–1.16	0.96	0.80–1.15
Ethnicity (ref = Belgium)	1.12	0.78–1.61	1.09	0.74–1.60	0.96	0.64–1.42
Sport club membership (ref = yes)	0.94	0.66–1.36	0.75	0.52–1.09	0.83	0.57–1.19

The Gamma models (Exp. B) estimated the proportional difference in sedentary time, LPA and MVPA in POS associated with a one-unit difference in the independent variables for adolescents that had used a POS. Analyses were controlled for mean temperature, residence, POS visits/day, total wear time (mean min/day), total time in POS and amount of days. All Gamma models were fitted using the log link function
LPA light-intensity physical activity, MVPA moderate- to vigorous-intensity physical activity, OR odds ratio, CI confidence interval, Exp. B exponent of B, POS public open space, ref reference category, min minutes, ° = α < 0.1 = trend towards significance
**α < 0.01

ISSN: 1476-072X