Kazuaki Suyama

Dr. Kazuaki Suyama

orcid

Research Focus & Metrics

Academic Career Length

26Years (2001-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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10 October 2015 in The Journal of nutrition, health and aging
Verified
Journal Article
Open access
PDF file
TTTakako Tanaka
Takako Tanaka
KTK. Tanaka
K. Tanaka
KSKazuaki Suyama
Kazuaki Suyama
SHS. Honda
S. Honda
HSH. Senjyu
H. Senjyu
RKRyo Kozu
Ryo Kozu
To examine the relationship between the living location and outcomes of physical activity level and physical and psychological functioning in older women. The specific aim was to understand the association between living in a sloped versus non-sloped environment and these outcomes.

1 December 2017 in International Journal of Chronic Obstructive Pulmonary Disease
Verified
Journal Article
Open access
PDF file
KSKazuaki Suyama
Kazuaki Suyama
RKRyo Kozu
Ryo Kozu
TTTakako Tanaka
Takako Tanaka
YIYuji Ishimatsu
Yuji Ishimatsu
TSTerumitsu Sawai
Terumitsu Sawai

Background:
The impact of airway obstruction of nonsmoking women caused by their husband’s smoking is unclear, despite the association between environmental tobacco smoke (ETS) exposure at home and obstructive pulmonary diseases among nonsmoking women. The aim of this study was to provide evidence that ETS exposure from the husband at home has a more significant influence on the airway obstruction of nonsmoking women than other housemates. Participants and methods: Nonsmoking women aged 40 years or older were recruited from the health checkup during May 2015–December 2016, Japan. They answered structured questionnaires, including ETS exposure from their husbands and other housemates (parents, siblings and dependants), and performed spirometry. We categorized the women with any history of ETS exposure from housemates into three groups (A = husband, B = others and C = both of husband and others) and defined the control group as those with no ETS exposure from housemates. Results: A total of 811 nonsmoking women completed questionnaires and spirometry. The proportion of nonsmoking women who had airway obstruction (forced expiratory volume in 1 second [FEV1]/forced vital capacity [FVC] <70%) among Group A (7.5%) was significantly higher than those in the control group (1.1%, p<0.01) and Group B (0.8%, p<0.01). The proportion of airway obstruction in Group C (6.4%) was also higher than that in the control group (p<0.05) and Group B (p<0.05). ETS exposure from husband (odds ratio [OR], 3.53; 95% confidence interval [CI], 1.48–8.42) remained strongly associated with airway obstruction after multiple logistic regression analysis, adjusting for age, housemate’s smoking habits, family history and ETS exposure in childhood and at work. Conclusion: Nonsmoking women who were exposed to ETS from their husband had the lowest FEV1/FVC, and a higher proportion of them had airway obstruction when compared to nonsmoking women who experienced ETS from housemates other than their husbands. The findings suggest that tobacco control in husbands is the most important measure to prevent airway obstruction of nonsmoking women at home.

1 January 2001 in Rinsho yakuri/Japanese Journal of Clinical Pharmacology and Therapeutics
Verified
Journal Article
Open access
HFHiroyuki Furukawa
Hiroyuki Furukawa
KSKazuaki Suyama
Kazuaki Suyama
MKMasami Kawahara
Masami Kawahara
JIJunko Ishizaki
Junko Ishizaki
YMYukiko Matsushima
Yukiko Matsushima
KMKen'IChi Miyamoto
Ken'IChi Miyamoto

30 December 2025 in BMJ Supportive & Palliative Care
Verified
Journal Article
Closed access
STShusuke Toyama
Shusuke Toyama
TMTatsuya Morishita
Tatsuya Morishita
MHMasatoshi Hanada
Masatoshi Hanada
HNHiroki Nagura
Hiroki Nagura
KSKazuaki Suyama
Kazuaki Suyama
RKRyo Kozu
Ryo Kozu
Objective: To investigate whether initiating prehabilitation during neoadjuvant chemotherapy (NAC) is associated with postoperative recovery of functional exercise capacity in patients with oesophageal cancer. Methods: In this multicentre observational study, we classified patients with oesophageal cancer into two groups based on the timing of prehabilitation: the early prehab (initiated during NAC) and late prehab (initiated after NAC) groups. Prehabilitation consisted mainly of an exercise programme combining supervised sessions with prescribed self-exercise. Functional exercise capacity was assessed using the 6 min walk distance (6MWD) before surgery (T0) and at 3 (T1) and 6 weeks (T2) postoperatively. Secondary outcomes included muscle strength, body weight, fatigue and health-related quality of life. Between-group differences in changes in 6MWD were analysed using a linear mixed-effects model, and secondary outcomes were descriptively summarised. Results: 51 patients were analysed (early prehab group, n=17; late prehab group, n=34). Both groups showed a decline in 6MWD at T1 with partial recovery at T2. The early prehab group showed a smaller decrease in 6MWD at T2 (−13 m) compared with the late prehab group (−27 m), though the difference was not statistically significant (p=0.70). Trends favoured the early prehab group in muscle strength, fatigue and global health status scores. Conclusions: This study observed a modest trend towards better postoperative recovery in patients who initiated prehabilitation during NAC, although no statistically significant differences were detected between groups. Further prospective trials are needed to refine intervention quality and identify patient populations most likely to benefit. Trial registration number: UMIN000047895.

1 January 2015 in Rigakuryoho Kagaku
Verified
Journal Article
Open access
KSKazuaki Suyama
Kazuaki Suyama
MAMasaharu Asai
Masaharu Asai
TTTakako Tanaka
Takako Tanaka
KTKenichirou Tanaka
Kenichirou Tanaka
NMNaomi Miyamoto
Naomi Miyamoto
HSHideaki Senjyu
Hideaki Senjyu

2 October 2024 in Respiratory Investigation
Verified
Journal Article
Closed access
MHMasatoshi Hanada
Masatoshi Hanada
TNTadayoshi Nonoyama
Tadayoshi Nonoyama
TITomoyuki Ikeuchi
Tomoyuki Ikeuchi
KSKoki Sasaki
Koki Sasaki
KSKazuaki Suyama
Kazuaki Suyama
RKRyo Kozu
Ryo Kozu