Lifestyle habits associated with nocturnal urination frequency: The Nagahama study.

Nocturia is a risk factor for poor quality of life and increased mortality. This study was aimed to clarifying dietary habits, eating behaviors, and sleep characteristics associated with nocturia to identify modifiable lifestyle factors for nocturia.

This cross-sectional study included 5683 community residents (64.5 ± 7.7 years old). The frequency of nocturnal urination was recorded for 1 week using a sleep diary. The frequency of food intake, unfavorable eating behaviors, and sleep characteristics that may have influence on salt intake and wasting were obtained using a structured questionnaire.

The frequency of nocturnal urination was increased with age (β = .312, P < .001). Other basic factors associated with the frequency were the male sex (β = .090), hypertension (β = .038), sleep apnea (β = .030), B-type natriuretic peptide level (β = .089), and spot urine sodium excretion (β = -.058). Dietary factors independently associated with nocturnal urination frequency were coffee (≥1 time/day: β = -.059, P < .001) and green vegetable consumption (≥1 time/week: β = -.042, P = .001), whereas habitual intake of dairy products, miso soup, and alcohol were not associated with urination frequency. Later bedtime was inversely associated with nocturnal urination frequency independent of sleep duration (before 23:00: β = -.096; before 24:00: β = -.225; after midnight: β = -.240; all P < .001).

Coffee and green vegetable consumption and later bedtime but not sleep duration are lifestyle factors associated with nocturnal urination frequency.

Neurourology and urodynamics. 2019 Sep 04 [Epub ahead of print]

Yasuharu Tabara, Takeshi Matsumoto, Kimihiko Murase, Kazuya Setoh, Takahisa Kawaguchi, Shunsuke Nagashima, Satoshi Funada, Shinji Kosugi, Toyohiro Hirai, Takeo Nakayama, Tomoko Wakamura, Kazuo Chin, Fumihiko Matsuda, Nagahama study group

Center for Genomic Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan., Department of Respiratory Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan., Department of Respiratory Care and Sleep Control Medicine, Kyoto University Graduate School of Medicine, Kyoto, Japan., Department of Human Health Science, Kyoto University Graduate School of Medicine, Kyoto, Japan., Department of Urology, Kyoto University Hospital, Kyoto, Japan., Department of Medical Ethics and Medical Genetics, Kyoto University School of Public Health, Kyoto, Japan., Department of Health Informatics, Kyoto University School of Public Health, Kyoto, Japan.

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