Sleep duration and risk of breast cancer: The JACC Study

Cao, Jinhong; Eshak, Ehab S.; Liu, Keyang; Muraki, Isao; Cui, Renzhe; Iso, Hiroyasu; Tamakoshi, Akiko

doi:10.1007/s10549-018-4995-4

Cited by 28 publications

(23 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Shift work may modify sleep habits and chronotype [ 31 , 32 ]. Along these lines, an association between sleep duration and cancer has been described, finding a relationship between a deficit of hours of sleep and a higher risk of breast and colorectal cancer [ 33 , 34 ]. This risk association could be due to the existence of reduced levels of melatonin, as it suppresses the initiation phase of tumorigenesis and inhibits the proliferation of human cancer cell lines [ 35 ].…”

Section: Introductionmentioning

confidence: 99%

Night Shift Work, Chronotype, Sleep Duration, and Prostate Cancer Risk: CAPLIFE Study

Lozano‐Lorca

Olmedo-Requena

Vega-Galindo³

et al. 2020

IJERPH

View full text Add to dashboard Cite

To analyze the association between prostate cancer (PCa) risk and night shift work, chronotype, and sleep duration in the context of a population-based case-control study of incident prostate cancer in Spain, a total of 465 PCa cases and 410 controls were analyzed. Selection criteria were: (i) age 40–80 years, and (ii) residence in the coverage area of the reference hospitals for ≥6 months before recruitment. Exposure variables were: (i) night shift work (permanent or rotating); (ii) chronotype: morning, neither, or evening (Munich ChronoType Questionnaire) and (iii) sleep duration according to the recommendations of the American National Sleep Foundation. PCa aggressiveness was determined according to the International Society of Urology Pathology classification. Adjusted odds ratios (aOR) and 95% confidence intervals (95% CI) were estimated using logistic regression models. Night shift work was associated with PCa, aOR = 1.47 (95% CI 1.02–2.11), especially for rotating night shifts, aOR = 1.73 (95% CI 1.09–2.75). The magnitude of the association between ever night work and PCa was higher in evening subjects with aOR = 3.14 (95% CI 0.91–10.76) than in morning chronotypes with an aOR = 1.25 (95% CI 0.78–2.00). Working night shifts, especially rotating night shifts, could increase PCa risk. This risk may be higher in people with an evening chronotype.

show abstract

Section: Introductionmentioning

confidence: 99%

Night Shift Work, Chronotype, Sleep Duration, and Prostate Cancer Risk: CAPLIFE Study

Lozano‐Lorca

Olmedo-Requena

Vega-Galindo³

et al. 2020

IJERPH

View full text Add to dashboard Cite

show abstract

“…Our meta-analysis compared breast cancer risk for short (<7 hours) and for long (>8 hours), versus referent sleep duration (mostly 7-8 hours). The referent sleep duration group was similar to that used in other studies, except for Cao et al [11], Shen et al [13] and Wu et al [4] where the baseline category was switched using the generalised least squares method [26]. In studies where multiple categories of short or long sleep were available [2,5,6,8,9,13] , a single estimate was obtained using the generalised least squares method [26].…”

Section: Discussionmentioning

confidence: 99%

“…We performed a sensitivity analysis of the shortest versus average sleep of the individual studies. Since data on premenopausal women were only available in three studies [2,3,11], our sensitivity analysis was restricted to postmenopausal women [2][3][4][5]11]. never/rarely napping, and a complete case analysis (Table S2).…”

Section: Discussionmentioning

confidence: 99%

“…Our systematic review identified 14 previously published prospective studies (Table S3) [1][2][3][4][5][6][7][8][9][10][11][12][13][14].…”

Section: Meta-analysismentioning

confidence: 99%

“…Short sleep duration has been hypothesised to increase breast cancer risk [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. The light-at-night hypothesis suggests that exposure to artificial light at night may affect the circadian system and suppress melatonin production, which may lead to increased oestrogen production and a higher risk of breast cancer [15].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Sleep duration and breast cancer incidence: results from the million women study and a meta-analysis of published prospective studies

et al. 2019

View full text Add to dashboard Cite

Study objectives: To investigate the association between sleep duration and breast cancer incidence, we examined the association in a large UK prospective study and conducted a meta-analysis of prospective studies. Methods: In the Million Women Study, usual sleep duration over a 24-hour period was collected in 2001 for 713,150 participants without prior cancer, heart problems, stroke or diabetes (mean age=60 years). Follow-up for breast cancer was by record linkage to national cancer registry data for 14.3 years on average from the 3-year resurvey. Cox regression models yielded multivariable-adjusted breast cancer relative risks (RR) and 95% confidence intervals (CIs) for sleep duration categories. Published prospective studies of sleep duration and breast cancer risk were included in a metaanalysis, which estimated the inverse-variance weighted average of study-specific log RRs for short and for long versus average duration sleep. Results: After excluding the first five years to minimise reverse causation bias in the Million Women Study, 24,476 women developed breast cancer. Compared with 7-8 hours of sleep, the RRs for <6, 6, 9, and >9 hours of sleep were 1.01 (95%CI, 0.95-1.07), 0.99 (0.96-1.03), 1.01 (0.96-1.06), and 1.03 (0.95-1.12), respectively. In a meta-analysis of 14 prospective studies plus the Million Women Study, including 65,410 breast cancer cases, neither short (RR<7 hours=0.99 [0.98-1.01]) nor long (RR>8 hours=1.01 [0.98-1.04]) versus average duration sleep was associated with breast cancer risk. Conclusions: The totality of the prospective evidence does not support an association between sleep duration and breast cancer risk.

show abstract

Association between working hours and cancer risk in Japan: The Japan public health center-based prospective study

Hattori

Sobue

Zha

et al. 2022

Journal of Occupational Health

View full text Add to dashboard Cite

Objectives In this study, we evaluated the association between working hours and cancer risk in the Japanese population, which has not been evaluated. Methods Using a cohort database from a Japan Public Health Center‐based Prospective Study, we evaluated 26 738 participants (16 351 men and 10 387 women), who responded to a questionnaire about working hours and followed these participants from 1993–1994 to 2013. Participants were divided into four groups according to working hours (≤6, 7–8, 9–10, ≥11 h/day). The hazard ratio (HR) and 95% confidence interval (CI) of each cancer incidence were calculated using a multivariable‐adjusted Cox proportional hazard model. Results During 488 383 person‐years of follow‐up, 481 patients with newly diagnosed cancers were identified. There was no clear association between long working hours and overall cancer, lung cancer, and stomach cancer risks. Long working hours tended to increase prostate cancer risk in men and breast cancer risk in women, although the difference was not statistically significant. Increased liver cancer risk with short working hours (HR [95% CI]; 3.15 [1.44–6.88] in the ≤6 h/day group vs. 7–8 h/day) was observed. Colorectal cancer also tended to increase risk in short working hours, however, there were not statistically significance. Conclusions In this population, long working hours were not associated with cancer risk with statistically significance. The association between short working hours and liver cancer risk was observed, probably due to the reverse causation of liver cancer.

show abstract

Sleep duration and risk of breast cancer: The JACC Study

Cited by 28 publications

References 37 publications

Night Shift Work, Chronotype, Sleep Duration, and Prostate Cancer Risk: CAPLIFE Study

Night Shift Work, Chronotype, Sleep Duration, and Prostate Cancer Risk: CAPLIFE Study

Sleep duration and breast cancer incidence: results from the million women study and a meta-analysis of published prospective studies

Association between working hours and cancer risk in Japan: The Japan public health center-based prospective study

Contact Info

Product

Resources

About