Kenji Obayashi1, Keigo Saeki1, Hiromitsu Negoro2, Norio Kurumatani1. 1. Department of Community Health and Epidemiology, Nara Medical University School of Medicine, Nara, Japan. 2. Department of Urology, Kyoto University Graduate School of Medicine, Kyoto, Japan.
Abstract
OBJECTIVES: To evaluate the association between nocturia and the incidence of depressive symptoms. PARTICIPANTS AND METHODS: Of 1 127 participants in the HEIJO-KYO population-based cohort, 866 elderly individuals (mean age 71.5 years) without depressive symptoms at baseline were followed for a median period of 23 months. Nocturnal voiding frequency was logged using a standardized urination diary and nocturia was defined as a frequency of ≥2 voids per night. Depressive symptoms were assessed using the Geriatric Depression Scale. RESULTS: During the follow-up period, 75 participants reported the development of depressive symptoms (score ≥6). The nocturia group (n = 239) exhibited a significantly higher hazard ratio (HR) for incident depressive symptoms than the non-nocturia group (n = 627) in the Cox proportional hazard model, which was adjusted for age, gender, alcohol consumption, day length and presence of hypertension and chronic kidney disease (HR 1.69, 95% confidence interval [CI] 1.05-2.72; P = 0.032]. The significance remained after adjustment for sleep disturbances (HR 1.68, 95% CI 1.02-2.75; P = 0.040). Analysis stratified by gender showed that the association between nocturia and the incidence of depressive symptoms was significant in men (HR 2.51, 95% CI 1.27-4.97; P = 0.008) but not in women (HR 1.12, 95% CI 0.53-2.44; P = 0.74). CONCLUSIONS: Nocturia is significantly associated with a higher incidence of depressive symptoms in the general elderly population, and gender differences may underlie this association.
OBJECTIVES: To evaluate the association between nocturia and the incidence of depressive symptoms. PARTICIPANTS AND METHODS: Of 1 127 participants in the HEIJO-KYO population-based cohort, 866 elderly individuals (mean age 71.5 years) without depressive symptoms at baseline were followed for a median period of 23 months. Nocturnal voiding frequency was logged using a standardized urination diary and nocturia was defined as a frequency of ≥2 voids per night. Depressive symptoms were assessed using the Geriatric Depression Scale. RESULTS: During the follow-up period, 75 participants reported the development of depressive symptoms (score ≥6). The nocturia group (n = 239) exhibited a significantly higher hazard ratio (HR) for incident depressive symptoms than the non-nocturia group (n = 627) in the Cox proportional hazard model, which was adjusted for age, gender, alcohol consumption, day length and presence of hypertension and chronic kidney disease (HR 1.69, 95% confidence interval [CI] 1.05-2.72; P = 0.032]. The significance remained after adjustment for sleep disturbances (HR 1.68, 95% CI 1.02-2.75; P = 0.040). Analysis stratified by gender showed that the association between nocturia and the incidence of depressive symptoms was significant in men (HR 2.51, 95% CI 1.27-4.97; P = 0.008) but not in women (HR 1.12, 95% CI 0.53-2.44; P = 0.74). CONCLUSIONS:Nocturia is significantly associated with a higher incidence of depressive symptoms in the general elderly population, and gender differences may underlie this association.
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