Table 3.

OR and 95 % CI of breakfast-skipping-related lifestyles according to the frequency of breakfast intake

The frequency of skipping breakfast	Males										Females
	Eating breakfast		Skipping breakfast		Sometimes		Often		Usually		Eating breakfast		Skipping breakfast		Sometimes		Often		Usually
	(0/week)				(1–2 /week)		(3–4 /week)		(≥5 /week)		(0/week)				(1–2 /week)		(3–4 /week)		(≥5 /week)
No. of participants *	42 999		8953		2402		1640		4911		53 179		7654		2576		1793		3285
Late bedtime
	n	%	n	%	n	%	n	%	n	%	n	%	n	%	n%	%	n	%	n	%
No. of late bedtime	19 249	45	6042	68	1581	66	1092	67	3369	69	32 396	61	6111	80	2071	81	1443	81	2597	79
	OR		OR	95 % CI	OR	95 % CI	OR	95 % CI	OR	95 % CI	OR		OR	95 % CI	OR	95 % CI	OR	95 % CI	OR	95 % CI
Age- and area-adjusted OR	1·00		1·73	1·64, 1·82	1·67	1·53, 1·84	1·75	1·56, 1·95	1·75	1·64, 1·87	1·00		1·93	1·81, 2·05	2·05	1·85, 2·27	2·05	1·82, 2·32	1·78	1·63, 1·95
Multivariable OR	1·00		1·85	1·75, 1·95	1·75	1·60, 1·93	1·88	1·68, 2·11	1·88	1·76, 2·02	1·00		1·98	1·86, 2·11	2·03	1·83, 2·26	2·11	1·86, 2·39	1·87	1·71, 2·06
Living alone
	n	%	n	%	n	%	n	%	n	%	n	%	n	%	n	%	n	%	n	%
No. of living alone	2317	5	1031	12	250	10	194	12	587	12	3425	6	725	9	233	9	166	9	326	10
	OR		OR	95 % CI	OR	95 % CI	OR	95 % CI	OR	95 % CI	OR	95 % CI	OR	95 % CI	OR	95 % CI	OR	95 % CI	OR	95 % CI
Age- and area-adjusted OR	1·00		2·71	2·49, 2·94	2·39	2·08, 2·75	2·73	2·33, 3·20	2·87	2·59, 3·17	1·00		2·32	2·12, 2·53	2·13	1·84, 2·46	2·18	1·85, 2·58	2·56	2·25, 2·90
Multivariable OR	1·00		2·37	2·17, 2·58	2·20	1·90, 2·54	2·37	2·02, 2·79	2·46	2·21, 2·73	1·00		2·02	1·83, 2·21	2·02	1·74, 2·34	1·88	1·58, 2·24	2·10	1·84, 2·39

^*Individuals with missing data of each behaviour were excluded from their analysis (see online Supplemental Table 1).

Late bedtime included 11 p.m. or later and irregularly.

Multivariable OR were adjusted for age, area, education level, drinking status, smoking status, annual household income and health examinations.