Title |
Relationship between daily isoflavone intake and sleep in Japanese adults: a cross-sectional study
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Published in |
Nutrition Journal, December 2015
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DOI | 10.1186/s12937-015-0117-x |
Pubmed ID | |
Authors |
Yufei Cui, Kaijun Niu, Cong Huang, Haruki Momma, Lei Guan, Yoritoshi Kobayashi, Hui Guo, Masahiko Chujo, Atsushi Otomo, Ryoichi Nagatomi |
Abstract |
Isoflavones comprise a class of phytoestrogens that resemble human estrogen in chemical structure, and have weak estrogenic effects. Because estrogen modulates sleep duration and quality, we hypothesized that isoflavones would have a beneficial effect on sleep status in a way similar to estrogen. We conducted a cross-sectional study to investigate the relationship between daily isoflavone intake and sleep status in Japanese subjects. Our study included 1076 Japanese adults aged 20-78 years. Daily isoflavone intake was assessed using a brief self-administered diet history questionnaire, and sleep was evaluated using a self-reported questionnaire. The prevalence of regular sleep duration (7-8 h/day) and sufficient sleep quality were 13.3 % and 56.2 %, respectively. After adjusting for potential confounding factors, the odds ratios (95 % CIs) for optimal sleep duration (7-8 h) when higher isoflavone intakes (Q2-Q4) were compared with low isoflavone intake (Q1) were Q2: 0.94 (0.53-1.56); Q3: 1.28 (0.73-2.24); and Q4: 1.84 (1.06-3.18) (p for trend = 0.013). In the final adjusted model, sufficient sleep quality across categories of isoflavone intake was Q1: 1.00 (reference); Q2: 1.30 (0.91-1.84); Q3: 1.48 (1.03-2.12); and Q4: 1.78 (1.22-2.60); (p for trend = 0.002). Higher daily isoflavone intake was positively associated with optimal sleep duration and quality in a Japanese population. This finding suggests that daily isoflavone intake may have a potentially beneficial effect on sleep status. |
X Demographics
Geographical breakdown
Country | Count | As % |
---|---|---|
United States | 1 | 17% |
Portugal | 1 | 17% |
Australia | 1 | 17% |
United Kingdom | 1 | 17% |
France | 1 | 17% |
Unknown | 1 | 17% |
Demographic breakdown
Type | Count | As % |
---|---|---|
Members of the public | 3 | 50% |
Practitioners (doctors, other healthcare professionals) | 2 | 33% |
Scientists | 1 | 17% |
Mendeley readers
Geographical breakdown
Country | Count | As % |
---|---|---|
Brazil | 1 | 1% |
Unknown | 69 | 99% |
Demographic breakdown
Readers by professional status | Count | As % |
---|---|---|
Student > Master | 20 | 29% |
Student > Bachelor | 10 | 14% |
Other | 5 | 7% |
Student > Doctoral Student | 5 | 7% |
Professor | 4 | 6% |
Other | 10 | 14% |
Unknown | 16 | 23% |
Readers by discipline | Count | As % |
---|---|---|
Medicine and Dentistry | 19 | 27% |
Nursing and Health Professions | 15 | 21% |
Agricultural and Biological Sciences | 6 | 9% |
Sports and Recreations | 3 | 4% |
Neuroscience | 2 | 3% |
Other | 3 | 4% |
Unknown | 22 | 31% |