. 2024 Jul 8;24:1819. doi: 10.1186/s12889-024-19313-z

Table 4.

Effects of sleep duration on incidence of cancer grouped by gender

Characteristic	Male					Female					p _{for interaction}
Characteristic	N	Event N	HR¹	95% CI¹	p-value	N	Event N	HR¹	95% CI¹	p-value	p _{for interaction}
Overall cancer
Nocturnal sleep duration (hours)	4,657	160				5,339	165
6-9	2,303	68	—	—		2,458	73	—	—
<6	2,159	85	1.24	0.90, 1.71	0.195	2,668	83	1.32	0.69, 2.54	0.397	0.264
>9	195	7	1.06	0.48, 2.31	0.886	213	9	0.58	0.08, 4.46	0.604	0.674
Day time sleep duration(minutes)	4,657	160				5,339	165
≤30	2,676	83	—	—		3,748	113	—	—
>30	1,981	77	1.23	0.90, 1.68	0.203	1,591	52	1.12	0.59, 2.11	0.735	0.503
Total sleep duration(hours)	4,657	160				5,339	165
6-9	2,669	77	—	—		2,751	76	—	—
<6	1,470	61	1.32	0.94, 1.85	0.108	2,087	70	0.95	0.47, 1.90	0.879	0.467
>9	518	22	1.37	0.85, 2.21	0.191	501	19	0.80	0.27, 2.35	0.689	0.890
Digestive&Respiratory_System
Nocturnal sleep duration (hours)	4,657	125				5,339	59
6-9	2,303	54	—	—		2,458	25	—	—
<6	2,159	65	1.24	0.90, 1.71	0.195	2,668	32	1.00	0.59, 1.70	0.995	0.617
>9	195	6	1.06	0.48, 2.31	0.886	213	2	0.84	0.20, 3.58	0.817	0.801
Day time sleep duration(minutes)	4,657	125				5,339	59
≤30	2,676	63	—	—		3,748	47	—	—
>30	1,981	62	1.23	0.90, 1.68	0.203	1,591	12	0.63	0.33, 1.20	0.160	0.041
Total sleep duration(hours)	4,657	125				5,339	59
6-9	2,669	57	—	—		2,751	25	—	—
<6	1,470	50	1.32	0.94, 1.85	0.108	2,087	29	1.35	0.79, 2.33	0.275	0.815
>9	518	18	1.37	0.85, 2.21	0.191	501	5	1.02	0.39, 2.68	0.967	0.495
Other System
Nocturnal sleep duration (hours)	4,657	39				5,339	101
6-9	2,303	16	—	—		2,458	48	—	—
<6	2,159	22	1.32	0.69, 2.54	0.397	2,668	46	1.00	0.59, 1.70	0.995	0.199
>9	195	1	0.58	0.08, 4.46	0.604	213	7	0.84	0.20, 3.58	0.817	0.438
Day time sleep duration(minutes)	4,657	39				5,339	101
≤30	2,676	21	—	—		3,748	64	—	—
>30	1,981	18	1.12	0.59, 2.11	0.735	1,591	37	0.63	0.33, 1.20	0.160	0.810
Total sleep duration(hours)	4,657	39				5,339	101
6-9	2,669	22	—	—		2,751	51	—	—
<6	1,470	13	0.95	0.47, 1.90	0.879	2,087	36	1.35	0.79, 2.33	0.275	0.756
>9	518	4	0.80	0.27, 2.35	0.689	501	14	1.02	0.39, 2.68	0.967	0.416