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Featured researches published by Yoko Owa.


Menopause | 2014

Effects of grape seed proanthocyanidin extract on menopausal symptoms, body composition, and cardiovascular parameters in middle-aged women: a randomized, double-blind, placebo-controlled pilot study.

Masakazu Terauchi; Noe Horiguchi; Asuka Kajiyama; Mihoko Akiyoshi; Yoko Owa; Kiyoko Kato; Toshiro Kubota

ObjectiveThis study aims to assess the effects of proanthocyanidin—a class of polyphenol antioxidants extracted from grape seeds—on menopausal symptoms, body composition, and cardiovascular parameters in middle-aged women. MethodsWe conducted a randomized, double-blind, placebo-controlled study in 96 women aged 40 to 60 years who had at least one menopausal symptom. The study participants were randomized to receive grape seed extract tablets containing either low-dose (100 mg/d) or high-dose (200 mg/d) proanthocyanidin, or placebo, for 8 weeks. Their menopausal symptoms were evaluated using the Menopausal Health–Related Quality of Life Questionnaire, Hospital Anxiety and Depression Scale, and Athens Insomnia Scale before and after 4 and 8 weeks of treatment. Body composition and cardiovascular parameters were also measured. ResultsA total of 91 women (95%) completed the study. Background characteristics, including age, menopause status, subjective symptom scores, body composition, and cardiovascular parameters, were similar among the groups. The following significant changes were observed during the course of the study: (1) physical symptom score, hot flash score, and (2) Athens Insomnia Scale score decreased in the high-dose group after 8 weeks of treatment; (3) Hospital Anxiety and Depression Scale Anxiety score and (4) systolic and diastolic blood pressure decreased in the low-dose and high-dose groups after 4 weeks; and, (5) lastly, muscle mass increased in the low-dose and high-dose groups after 8 weeks of treatment. ConclusionsGrape seed proanthocyanidin extract is effective in improving the physical and psychological symptoms of menopause while increasing muscle mass and reducing blood pressure in middle-aged women.


Maturitas | 2012

Associations between anxiety, depression and insomnia in peri- and post-menopausal women

Masakazu Terauchi; Shiro Hiramitsu; Mihoko Akiyoshi; Yoko Owa; Kiyoko Kato; Satoshi Obayashi; Eisuke Matsushima; Toshiro Kubota

OBJECTIVES To determine the correlation between somatic and psychological symptoms and insomnia and the contribution of depression and anxiety to insomnia in a sample of peri- and post-menopausal women in a clinical setting. STUDY DESIGN The responses of 237 peri- and post-menopausal women enrolled in the Systematic Health and Nutrition Education Program (SHNEP) at the Menopause Clinic of the Tokyo Medical and Dental University Hospital between November 2007 and December 2010 to the Menopausal Health-Related Quality of Life (MHR-QOL) and Hospital Anxiety and Depression Scale (HADS) questionnaires were subjected to Spearmans rank correlation and logistic regression analyses. RESULTS The analysis revealed that (1) insomnia is highly prevalent, (2) the symptoms of difficulty in initiating sleep (DIS) and experiencing non-restorative sleep (NRS) are more strongly correlated with psychological than somatic symptoms, and (3) DIS is strongly associated with anxiety while NRS is strongly associated with depression in the population studied. CONCLUSIONS Insomnia is highly prevalent among peri- and post-menopausal female patients in a clinical setting and more closely associated with psychological than somatic symptoms. DIS is strongly correlated with anxiety while NRS is strongly correlated with depression.


Journal of Obstetrics and Gynaecology Research | 2013

Associations among depression, anxiety and somatic symptoms in peri‐ and postmenopausal women

Masakazu Terauchi; Shiro Hiramitsu; Mihoko Akiyoshi; Yoko Owa; Kiyoko Kato; Satoshi Obayashi; Eisuke Matsushima; Toshiro Kubota

The aim of this study was to investigate the associations among depression, anxiety and physical symptoms in peri‐ and postmenopausal women in a clinical setting.


International Journal of Gynecology & Obstetrics | 2011

Effects of the Kampo medication keishibukuryogan on blood pressure in perimenopausal and postmenopausal women

Masakazu Terauchi; Mihoko Akiyoshi; Yoko Owa; Kiyoko Kato; Satoshi Obayashi; Toshiro Kubota

To examine the effects of keishibukuryogan (TJ‐25)—a medicine of the Kampo tradition (the Japanese adaptation of Chinese herbal medicine)—on middle‐aged women with high blood pressure.


Menopause | 2015

Prevalence and predictors of storage lower urinary tract symptoms in perimenopausal and postmenopausal women attending a menopause clinic.

Masakazu Terauchi; Asuka Hirose; Mihoko Akiyoshi; Yoko Owa; Kiyoko Kato; Toshiro Kubota

Objective:This study was undertaken to evaluate the prevalence and predictors of storage lower urinary tract symptoms (LUTS) in perimenopausal and postmenopausal women attending a menopause clinic. Methods:The records of 351 women aged 40 to 76 years who enrolled in a health and nutrition education program at a menopause clinic were analyzed cross-sectionally. The prevalence of frequency, nocturia, urge incontinence, and stress incontinence was estimated based on womens responses to the Menopausal Health-Related Quality of Life Questionnaire. Effects of background characteristics, including age, menopause status, vaginal dryness, body composition, cardiovascular parameters, physical fitness, and psychological symptoms, on storage LUTS were assessed using multivariate logistic regression analysis. Results:Frequency, nocturia, urge incontinence, and stress incontinence were reported by 45.9%, 10.8%, 11.4%, and 32.8% of women, respectively. Multiple logistic regression analysis revealed independent associations between storage LUTS and the following predictors after adjustment: frequency was associated with nonrestorative sleep score (odds ratio, 1.63; 95% CI, 1.35-1.95); nocturia was associated with nonrestorative sleep score (odds ratio, 2.26; 95% CI, 1.57-3.25) and waist-to-hip ratio (odds ratio, 1.12; 95% CI, 1.05-1.18); urge incontinence was associated with reaction time (odds ratio, 1.10; 95% CI, 1.01-1.19); and stress incontinence was associated with body fat (odds ratio, 1.06; 95% CI, 1.03-1.09). Conclusions:Storage LUTS are highly prevalent in perimenopausal and postmenopausal women attending a menopause clinic. Nonrestorative sleep score is associated with frequency and nocturia; body fat and visceral fat accumulation are associated with nocturia and stress incontinence; and delayed reaction time is associated with urge incontinence. Careful evaluation of nonrestorative sleep, body fat and visceral fat accumulation, or delayed reaction time might reveal undisclosed storage LUTS in this population.


Evidence-based Complementary and Alternative Medicine | 2014

Effects of the Kampo Formula Tokishakuyakusan on Headaches and Concomitant Depression in Middle-Aged Women

Masakazu Terauchi; Shiro Hiramitsu; Mihoko Akiyoshi; Yoko Owa; Kiyoko Kato; Satoshi Obayashi; Eisuke Matsushima; Toshiro Kubota

Objectives. To identify the correlates of headaches in middle-aged women and investigate the effects of Tokishakuyakusan (TJ-23), a formula of traditional Japanese herbal therapy Kampo, on headache and concomitant depression. Methods. We examined cross-sectionally the baseline records of 345 women aged 40–59 years who visited our menopause clinic. Among them, 37 women with headaches were treated with either hormone therapy (HT) or TJ-23; the data of these women were retrospectively analyzed to compare the effects of the treatment. Results. The women were classified into 4 groups on the basis of their headache frequency, and no significant intergroup differences were noted in the physical or lifestyle factors, except age. Multiple logistic regression analysis revealed that the significant contributors to the womens headaches were their age (adjusted OR 0.92 (95% CI 0.88–0.97)) and their depressive symptoms (adjusted OR 1.73 (95% CI 1.39–2.16)). Compared to women treated with HT, women treated with TJ-23 reported relief from headaches (65% versus 29%) and concomitant depression (60% versus 24%) more frequently. Improvement in the scores of headaches and depression correlated significantly with TJ-23 treatment. Conclusions. Headache in middle-aged women is significantly associated with depression; TJ-23 could be effective for treating both of these symptoms.


Climacteric | 2016

Subjective insomnia is associated with low sleep efficiency and fatigue in middle-aged women

Asuka Hirose; Masakazu Terauchi; Mihoko Akiyoshi; Yoko Owa; Kiyoko Kato; Toshiro Kubota

Abstract Objectives: Many middle-aged women are affected by sleep disturbance. We investigated how subjective insomnia is associated with objective sleep parameters and other background characteristics. Methods: This cross-sectional study used baseline data obtained from 95 women aged 40–59 years who participated in another study assessing the effects of a dietary supplement. Participants wore an actigraph unit for 3 days to collect information concerning physical activities and objective sleep parameters and were then evaluated for body composition, cardiovascular parameters, and menopausal symptoms including insomnia and fatigue, and lifestyle factors. Stratifying Athens Insomnia Scale scores as low (0–5 points, control group) and high (≥ 6 points, subjective insomnia group), we sought to identify the parameters that are independently associated with subjective insomnia. Results: Women with subjective insomnia (n = 30) had lower sleep efficiency than did the controls. They were also older; had more live births, lower height, higher body mass index, lower ankle brachial index, and more severe menopausal symptoms including fatigue; took more naps; smoked more cigarettes; and more of them were full-time workers. Multivariate logistic regression analysis revealed that low sleep efficiency (adjusted odds ratio, 1.44 per 1% decrease in sleep efficiency; 95% confidence interval 1.06–2.05) and fatigue assessed with Brief Fatigue Inventory (BFI) (adjusted odds ratio, 1.57 per 1-point increase in BFI score; 95% confidence interval 1.19–2.13) were independent contributors to subjective insomnia. Conclusions: Low sleep efficiency and feeling of fatigue were found to be independently associated with subjective insomnia in middle-aged women.


BMC Women's Health | 2014

Subgrouping of Japanese middle-aged women attending a menopause clinic using physical and psychological symptom profiles: a cross-sectional study

Masakazu Terauchi; Asuka Hirose; Mihoko Akiyoshi; Yoko Owa; Kiyoko Kato; Toshiro Kubota

BackgroundWomen in the menopausal transition and the postmenopausal period are affected with vasomotor symptoms, urogenital atrophy, sexual dysfunction, somatic symptoms, cognitive difficulty, sleep disturbance, and psychological problems. It is important to gain a better understanding of the complexity and diversity of climacteric disturbance in order to optimize treatments for individual patients. The aim of this study was to identify subgroups of Japanese perimenopausal and postmenopausal women attending a menopause clinic based on their physical and psychological symptom profiles.MethodsWe administered the Menopausal Health-Related Quality of Life questionnaire to 491 Japanese women aged 40-64 years who had enrolled in the Systematic Health and Nutrition Education Program at the Menopause Clinic of the Tokyo Medical and Dental University Hospital between 2005 and 2012. We performed a principal component analysis followed by a hierarchical cluster analysis of the responses to 9 physical and 12 psychological items on the questionnaire.ResultsThe first analysis extracted 3 principal components that defined the variance of physical and psychological symptom profiles: depression, somatic, and vasomotor/sleep. A subsequent cluster analysis was performed based on the 3 principal components to generate 4 clusters, CL8 (N = 162; 33.0%), CL6 (N = 111; 22.6%), CL5 (N = 102; 20.8%), and CL4 (N = 116; 23.6%). CL8 included women who only had mild-to-moderate musculoskeletal pains and tiredness. All women in CL6, CL5, and CL4 described their musculoskeletal pains and tiredness as moderate to severe. The women in CL5 also had moderate-to-severe vasomotor symptoms, while the women in CL4 also suffered from moderate-to-severe psychological symptoms, such as depression, anxiety, and insomnia.ConclusionsDistinct subgroups of Japanese perimenopausal and postmenopausal women were identified based on their symptom profiles. Menopausal symptoms were shown to accumulate in this population in the order of musculoskeletal pains and tiredness, vasomotor symptoms, and psychological symptoms.


Maturitas | 2017

Higher intake of cryptoxanthin is related to low body mass index and body fat in Japanese middle-aged women

Asuka Hirose; Masakazu Terauchi; Miho Hirano; Mihoko Akiyoshi; Yoko Owa; Kiyoko Kato; Toshiro Kubota

OBJECTIVES The prevalence of cardiovascular diseases increases with age, especially in postmenopausal women. In this study, we investigated the dietary patterns associated with body mass and body fat in Japanese middle-aged women. STUDY DESIGN Cross-sectional. MAIN OUTCOME MEASURES This study used baseline data collected in a previous study in 88 women aged 40-60 years. Participants were assessed for age, menopausal status, lifestyle factors, body composition, and dietary habits using a brief-type self-administered diet history questionnaire, which provides information on the amounts of nearly 100 nutritional factors consumed during the previous month. Classifying body mass index (BMI) as low (≤22kg/m2) or high (>22kg/m2) and percentage body fat as low (≤25%) or high (>25%), we sought to identify the nutritional factors associated with BMI and percentage body fat. RESULTS Consumption differences between high/low BMI and high/low body fat percentage groups were not significant for any nutritional factors except cryptoxanthin. Multiple logistic regression analysis adjusting for age, menopausal status, working, exercise, and smoking revealed that higher cryptoxanthin intake was associated with low BMI (adjusted odds ratio, 1.22 per 100μg/day increase of cryptoxanthin intake; 95% confidence interval, 1.01-1.52) and low body fat percentage (adjusted odds ratio, 1.36 per 100μg/day increase of cryptoxanthin intake; 95% confidence interval, 1.13-1.70). CONCLUSIONS Higher intake of cryptoxanthin was shown to be related to low body mass and body fat in Japanese middle-aged women.


European Journal of Applied Physiology | 2006

Body fat and blood lipids in postmenopausal women are related to resting autonomic nervous system activity

Tetsuya Kimura; Tamaki Matsumoto; Mihoko Akiyoshi; Yoko Owa; Naoyuki Miyasaka; Takeshi Aso; Toshio Moritani

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Mihoko Akiyoshi

Tokyo Medical and Dental University

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Kiyoko Kato

Tokyo Medical and Dental University

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Toshiro Kubota

Tokyo Medical and Dental University

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Masakazu Terauchi

Tokyo Medical and Dental University

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Asuka Hirose

Tokyo Medical and Dental University

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Satoshi Obayashi

Tokyo Medical and Dental University

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Eisuke Matsushima

Tokyo Medical and Dental University

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Shiro Hiramitsu

Tokyo Medical and Dental University

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Naoyuki Miyasaka

Tokyo Medical and Dental University

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Takeshi Aso

Tokyo Medical and Dental University

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