Table 3.
Association of timing of supper and sleep interval on risk of breast and prostate cancer
| Controls for breast cancer N (%) | Breast cancer cases N (%) | OR (95%CI)a | Controls for prostate cancer N (%) | Prostate cancer cases N (%) | OR (95%CI)b | Combined breast and prostate cancer OR (95%CI) | |
|---|---|---|---|---|---|---|---|
| Supper/sleep interval | |||||||
| 1 hr or less (ref) | 234 (18.6) | 230 (19.8) | 304 (36.4) | 253 (42.4) | |||
| From >1 to ≤2 hr | 493 (39.2) | 483 (41.6) | 0.99 (0.79,1.24) | 321 (38.4) | 215 (36.1) | 0.79 (0.62,1.02) | 0.89 (0.72,1.11) |
| More than 2 hr | 530 (42.2) | 448 (38.6) | 0.84 (0.67,1.06) | 210 (25.1) | 128 (21.5) | 0.74 (0.55,0.99) | 0.80 (0.67,0.96) |
| Time of supper | |||||||
| 10 pm or later (ref) | 260 (20.4) | 271 (23.0) | 257 (30.2) | 204 (33.4) | |||
| 9:00 to <10 pm | 721 (56.5) | 641 (54.5) | 0.86 (0.70,1.05) | 470 (55.2) | 329 (53.9) | 0.88 (0.69,1.12) | 0.86 (0.74,1.01) |
| Before 9 pm | 296 (23.2) | 264 (22.4) | 0.85 (0.66,1.09) | 124 (14.6) | 77 (12.6) | 0.75 (0.53,1.07) | 0.82 (0.67,1.00) |
| Combined time of supper and supper/sleep interval c | |||||||
| Late supper/short interval (ref) | 105 (8.4) | 107 (9.2) | 141 (16.9) | 121 (20.3) | |||
| Intermediate | 949 (75.5) | 894 (77.0) | 0.94 (0.70,1.25) | 633 (75.8) | 436 (73.2) | 0.79 (0.59,1.05) | 0.86 (0.70,1.05) |
| Early supper/long interval | 203 (16.1) | 160 (13.8) | 0.77 (0.54,1.09) | 61 (7.3) | 39 (6.5) | 0.74 (0.45,1.19) | 0.76 (0.57,1.00) |
a
Adjusted for age, educational level, menopausal status and center.
b
Adjusted for age, educational level and center.
c
Combined time of supper and supper/sleep interval: Late supper/Short interval: after 10 pm supper and less than 1‐hr supper‐sleep interval; Early supper/Long Interval: Before 9 pm supper and >2 hr supper‐sleep interval; Intermediate: other combinations.