Combined influence of media use on subjective health in elementary school children in Japan: a population-based study

Nakamura, Harunobu; Ohara, Kumiko; Kouda, Katsuyasu; Fujita, Yuki; Mase, Tomoki; Miyawaki, Chiemi; Okita, Yoshimitsu; Ishikawa, Tetsuya

doi:10.1186/1471-2458-12-432

Table 2 Comparative analysis of media use and lifestyle

From: Combined influence of media use on subjective health in elementary school children in Japan: a population-based study

	Game		TV		PC
	less than 1 hr	more than 1 hr	less than 1 hr	more than 1 hr	less than 1 hr	more than 1 hr
Bedtime
−21:00	91	13*	57	43*	99	4*
21:00–22:00	817	118	409	511	892	30
22:00–23:00	964	227	366	808	1090	84
23:00–24:00	210	80	66	217	250	37
24:00-	22	24	10	35	33	11
Irregular	633	226	278	564	782	58
Total	2737	688	1186	2178	3146	224
Waking time
−6:00	191	30*	97	119*	202	15*
6:00–7:00	1327	287	580	1003	1490	98
7:00–8:00	944	265	379	814	1116	74
8:00-	33	15	15	32	38	8
Irregular	234	90	114	202	295	27
Total	2729	687	1185	2170	3141	222
Good feeling on waking
Usually	727	115*	356	468*	784	41*
Often	1450	316	568	1170	1637	108
Occasionally	432	183	207	400	551	52
Seldom	89	56	38	102	127	16
Total	2698	670	1169	2140	3099	217
Breakfast eating
Everyday	2455	554*	1069	1886*	2783	180*
Often	194	64	74	179	229	21
Occasionally	58	42	24	74	87	13
Seldom	21	23	8	34	33	10
Total	2728	683	1175	2173	3132	224
Eating breakfast alone
Usually	353	107*	130	321*	408	41*
Often	440	107	175	361	494	41
Occasionally	471	154	212	408	570	54
Seldom	1457	310	658	1075	1655	85
Total	2721	678	1175	2165	3127	221
Dinner time
−18:00	101	24	60	63*	114	10
18:00–19:00	730	188	342	562	855	46
19:00–20:00	1383	332	564	1119	1577	112
20:00–21:00	440	114	185	358	500	44
21:00-	54	21	26	50	69	7
Total	2708	679	1177	2152	3115	219
Eating dinner alone
Usually	68	23	31	59	78	12*
Often	235	65	93	202	278	21
Occasionally	425	127	180	364	494	49
Seldom	1980	460	867	1528	2261	138
Total	2708	675	1171	2153	3111	220
Learning time at home
none	78	42*	44	72	103	15*
up to 30 min	776	211	358	599	901	63
30–60 min	1264	282	528	1000	1444	83
1–2 hrs	491	120	198	406	554	50
2 hrs-	110	29	50	88	124	11
Total	2719	684	1178	2165	3126	222
Reading at home
Usually	341	55*	172	218*	364	30
Often	1140	212	494	831	1245	80
Occasionally	755	221	328	634	907	55
Seldom	492	195	186	487	618	58
Total	2728	683	1180	2170	3134	223

Values are head-counts. TV: television, PC: personal computer.
*p<0.05for chi-square test.

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ISSN: 1471-2458

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