. 2017 Jun 4;14(6):596. doi: 10.3390/ijerph14060596

Table 4.

The relation of BMI z-score, sleep duration, PA and screen time components (n = 2625).

Characteristics	BMI z-Score ¹						Sleep Duration ²						PA ³
	School Day Behaviors			Non-School Day Behaviors			School Day Behaviors			Non-School Day Behaviors			School Day Behaviors			Non-School Day Behaviors
	OR	SE	p ⁴	OR	SE	p	OR	SE	p	OR	SE	p	OR	SE	p	OR	SE	p
Age	1.257	0.043	0.000	1.260	0.044	0.000	0.581	0.017	0.000	0.597	0.017	0.000	0.865	0.022	0.000	0.856	0.215	0.000
Gender	3.305	0.428	0.000	3.060	0.426	0.000	0.581	0.052	0.000	0.598	0.058	0.000	0.528	0.045	0.000	0.537	0.050	0.000
Watching TV
Never	Ref.						Ref.						Ref.
Not every day or <1 h	1.034	0.148	0.815	0.928	0.159	0.663	1.462	0.167	0.001	1.044	0.137	0.742	1.007	0.108	0.946	0.831	0.103	0.135
2–4 h	1.234	0.437	0.552	1.022	0.165	0.892	1.443	0.415	0.202	1.130	0.139	0.320	0.930	0.248	0.785	0.994	0.115	0.956
>4 h	0.882	0.668	0.868	1.178	0.259	0.457	1.099	0.648	0.872	1.251	0.209	0.180	0.258	0.169	0.038	0.745	0.119	0.065
Playing e-games ⁵
Never	Ref.						Ref.						Ref.
Not every day or <1 h	1.100	0.181	0.562	1.052	0.201	0.790	0.983	0.128	0.897	1.061	0.138	0.651	0.926	0.113	0.530	0.883	0.110	0.320
2–4 h	0.831	0.251	0.541	0.803	0.145	0.226	1.054	0.270	0.838	1.307	0.170	0.039	0.942	0.226	0.803	1.085	0.134	0.510
>4 h	1.826	1.267	0.386	1.010	0.217	0.964	1.110	0.580	0.842	1.128	0.183	0.459	1.901	1.041	0.240	1.000	0.154	0.997
Electronic news/study materials
Never	Ref.						Ref.						Ref.
Not every day or <1 h	0.913	0.144	0.564	1.097	0.234	0.664	0.890	0.107	0.332	1.045	0.175	0.794	1.001	0.115	0.934	0.743	0.116	0.057
2–4 h	0.775	0.172	0.250	0.891	0.188	0.585	0.810	0.146	0.241	0.937	0.155	0.695	1.075	0.181	0.668	0.739	0.115	0.051
>4 h	0.593	0.279	0.266	0.899	0.215	0.655	1.034	0.387	0.928	1.000	0.189	0.998	1.423	0.509	0.324	0.805	0.143	0.223
Using SNS ⁶
Never	Ref.						Ref.						Ref.
Not every day or <1 h	1.117	0.186	0.509	1.401	0.288	0.102	0.844	0.109	0.189	0.930	0.157	0.665	1.137	0.137	0.287	1.237	0.199	0.185
2–4 h	0.763	0.184	0.263	1.580	0.330	0.028	0.724	0.145	0.108	0.915	0.157	0.604	1.431	0.267	0.055	1.489	0.242	0.014
>4 h	1.663	0.649	0.192	1.454	0.336	0.106	0.791	0.223	0.406	0.760	0.144	0.147	1.282	0.341	0.350	1.223	0.222	0.264
Watching videos
Never	Ref.						Ref.						Ref.
Not every day or <1 h	0.895	0.150	0.510	1.296	0.280	0.231	0.763	0.101	0.041	0.937	0.154	0.689	0.861	0.106	0.226	1.056	0.163	0.722
2–4 h	1.170	0.330	0.578	0.988	0.202	0.951	0.668	0.152	0.076	1.227	0.194	0.197	1.033	0.216	0.877	0.956	0.143	0.762
>4 h	0.856	0.412	0.746	0.812	0.196	0.388	0.522	0.210	0.107	0.938	0.177	0.732	1.686	0.657	0.180	0.969	0.172	0.860
Log Likelihood	−1021.5792			−1017.284			−1548.4339			−1554.1503			−1690.5321			−1690.4635
Model L	152.51			161.10			498.25			486.82			123.75			123.89

¹ 0 = overweight/obese; 1 = under/normal weight. ² 0 = slept <8 h a night; 1 = slept ≥8 h a night. ³ 0 = engaged in “strenuous activity” on <3 days in a typical week; ⁴ Values in bold are statistically significance (p < 0.05); ⁵ e-games: Electronic games; ⁶ SNS: Social networking sites. 1 = engaged in “strenuous activity” on ≥3 days in a typical week.