Publications by authors named "Hiroyuki Oka"
Aim: This study aims to investigate the impact of aging on brain volume among community residents in Japan, focusing on trends over time and specific brain structures.
Methods: We analyzed data from the fourth survey (2015-2016) of the Research on Osteoarthritis/Osteoporosis Against Disability project, encompassing 2146 community residents from Japan's mountainous and coastal regions. A total of 1755 participants (81.
We evaluated the role of Helicobacter pylori (H. pylori)-related chronic gastritis in the development of osteoporosis in a population-based study. A total of 1690 subjects in the cohort of the Research on Osteoarthritis/ osteoporosis Against Disability (ROAD) were investigated, and the association between gastritis and osteoporosis was evaluated by the presence of serologically assessed H.
View Article and Find Full Text PDFBackground: A geographical analysis could be employed to uncover social risk factors and interventions linked to chronic pain. Nonetheless, geographical variation in chronic pain across different regions of Japan have not been well explored. This study aims to investigate geographical variation in high-impact chronic pain (HICP), defined as moderate to severe chronic pain, and examine the associated psychological factors at the prefecture level.
View Article and Find Full Text PDFGallbladder abscess is extremely rare. Aseptic abscesses are sometimes observed in patients with active ulcerative colitis (UC) with no history of colectomy; however, it is rare for an aseptic abscess in the gallbladder to develop after surgery for UC. We treated a 56-year-old man with UC and severe pouchitis who had undergone subtotal colorectal resection.
View Article and Find Full Text PDFObjectives: To investigate the prevalence and incidence rates of sarcopenia in Japanese community-dwelling people according to the criteria of the Asian Working Group for Sarcopenia 2019 recommendations, using a large-scale population-based cohort over a 10-year follow-up period.
Design: Prospective cohort study.
Setting And Participants: This study was conducted using data from the Research on Osteoarthritis/Osteoporosis Against Disability (ROAD) study.
Article Synopsis
- This study investigates how lumbar spine disorders, specifically scoliosis, affect the occurrence of asymmetric hallux valgus (HV) among participants in a nationwide study in Japan.
- The researchers categorized HV severity using radiographic angles and identified asymmetric HV as a difference of two or more severity grades between the left and right foot.
- Results showed that, out of 1997 participants, those with asymmetric HV had a higher incidence of lumbar issues, with scoliosis being a significant independent factor that increased the likelihood of asymmetric HV.
Article Synopsis
- Osteoporosis, vertebral fractures, and spinal degenerative diseases are prevalent in older adults, and this study investigated their effect on low back pain and daily activities in individuals with multiple health issues.
- Conducted in Japan, the study involved 1009 participants who underwent spinal MRI and various assessments to evaluate their conditions and physical performance related to low back pain.
- The results revealed a strong correlation between vertebral fractures, low back pain severity (measured by the Oswestry Disability Index), and reduced physical performance, indicating that while osteoporosis alone didn't directly affect pain levels, vertebral fractures significantly did.
Article Synopsis
- The study aimed to identify factors linked to locomotive syndrome (LS) using medical questionnaires and machine learning techniques.
- A total of 1,575 participants underwent LS risk tests, and after data cleaning, 331 questionnaire items were analyzed to determine their association with LS through advanced statistical methods.
- Nine key factors, especially age and back pain during walking, were identified as strongly correlated with LS, showing better predictive performance compared to existing assessment tools.
Article Synopsis
- - This study aimed to compare the effectiveness of two first-line treatments for Helicobacter pylori eradication: a triple therapy featuring vonoprazan, amoxicillin, and metronidazole (VAM) versus another using vonoprazan, amoxicillin, and clarithromycin (VAC).
- - Conducted in Japan with 124 participants, the trial showed that both treatments yielded similar success rates for eradication, around 91% for VAM and 89% for VAC, without significant differences between them.
- - The results indicate that VAM can be considered an effective first-line treatment and suggests its classification as a grade B regimen, indicating a good potential for national insurance approval in Japan.
Article Synopsis
- Pain is a serious global issue that can lead to inactivity and negative emotions, while exercise is often promoted for better health, although it may sometimes increase pain.
- A study involving over 52,000 adults in Japan found that regular, high-frequency exercise is linked to reduced pain intensity, with the association mediated by psychological factors like Negative Affect and Vigor.
- The research suggests that the more frequently individuals exercise, the more pronounced the reduction in pain, and this effect was also observed across various types of pain and increased with age.
Article Synopsis
- The study aimed to analyze the changes over ten years in the medial minimum joint space width (mJSW) and osteophyte area (OPA) of knee joints among Japanese adults using data from two independent cohorts.
- Data was collected from nearly 3,000 participants in initial surveys between 2005-2007, followed by another survey with about 2,400 participants from 2015-2016, focusing on measuring mJSW and OPA using automated systems.
- Results showed a significant increase in mJSW for both men and women over the ten years, suggesting a potential decrease in knee osteoarthritis incidence and progression, while OPA trends were less consistent.
Femoroacetabular impingement has increasingly been recognized as a cause of primary hip osteoarthritis; however, its epidemiological indications remain unclear. We aimed to clarify the epidemiological indications and factors associated with cam deformity in a large-scale population-based cohort in Japan. Overall, 1480 participants (2960 hips) (491 men, 989 women; mean age, 65.
View Article and Find Full Text PDFAim: No studies have examined the association between plasma pentosidine levels and ossification diseases in large cohorts of Japanese residents. This study aimed to investigate the association between cervical ossification of the posterior longitudinal ligament (OPLL) and other ossification diseases, including diffuse idiopathic skeletal hyperostosis, lumbar spondylosis and knee osteoarthritis (OA), by examining plain radiographs of the knee, and cervical, thoracic and lumbar spine from 1690 participants, and the association between these diseases and plasma pentosidine.
Design: We enrolled 1690 participants (596 men and 1094 women) from mountainous and coastal areas from the study population of the previous Research on Osteoarthritis/Osteoporosis Against Disability study.
Article Synopsis
- The study investigates the prevalence and distribution of degenerative spinal conditions like disc degeneration (DD), Schmorl nodes (SN), and endplate signal changes (ESC) in a population-based cohort of 975 participants.
- Results show high prevalence rates of SN (71% in men, 77% in women) and ESC (57.9% in men, 56.3% in women), with the thoracic region having the highest occurrence in both sexes.
- Positive correlations were found between SN and DD, as well as ESC and DD, suggesting a relationship among these conditions, while a weaker correlation existed between SN and ESC.
Retrospective cohort study. Spinal deformities in patients with Marfan syndrome (MFS) are distinct from those in patients with idiopathic scoliosis (IS). It is more prone to progression and more likely to present with sagittal malalignment than IS.
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- The study examined the potential causal relationship between the medial partite hallux sesamoid (MPHS) and hallux valgus (HV) using data from a diverse group of participants aged 21-95 years.
- Out of 3,994 feet analyzed, 12.7% had MPHS, with notable differences in prevalence between men and women, and a significant decrease in MPHS occurrence with age.
- The findings suggest that while MPHS is associated with an increased HV angle, the relationship is stronger in younger populations, indicating that MPHS may contribute to the development of HV rather than being caused by it, particularly in younger adults.
Article Synopsis
- * A study involving 1121 older Japanese adults analyzed their postures using measurements from sagittal whole-spine radiography and muscle mass assessments, categorizing participants into normal, compensated, non-compensated, and decompensated groups based on PT and C7-SVA.
- * Results revealed significant differences in low back pain (LBP), disability, and sarcopenia across the groups, indicating that those using pelvic compensation face
Article Synopsis
- Humans walk upright thanks to a phenomenon called upright bipedalism, which involves various brain areas, especially the supplementary motor area (SMA), for trunk posture control.
- A trunk orthosis, known as Trunk Solution (TS), was tested to see if it alleviates the SMA's workload during walking.
- The study found that while walking independently, SMA activity stayed the same, but when participants used the TS for support, SMA activity significantly decreased, suggesting the orthosis helps reduce strain on the SMA.
Article Synopsis
- A study in Japan investigated the prevalence of atrophic gastritis (AG) and infection from 2005 to 2016 using data from 3,596 participants, showing a significant decline in both conditions over the decade.
- At baseline, AG prevalence was 40.1% and infection was 52.2%, while 10 years later, AG rates dropped to 25.8% and infection rates to 35.5%.
- The research indicated that AG prevalence increased with age, while infection prevalence showed an inverted U-shaped trend, suggesting that the changes may impact related health issues like colorectal neoplasia and arteriosclerosis.
Article Synopsis
- A study over the past 16 years examined knee radiographs of rheumatoid arthritis (RA) patients who had total knee arthroplasty (TKA) to observe trends in joint destruction patterns.*
- Researchers analyzed 831 preoperative radiographs using automated software, focusing on five specific parameters, and classified the findings into three distinct clusters based on radiographic features.*
- Results indicated that while one cluster (conventional RA type) showed a decline, two other clusters (osteoarthritis type and less destructive type) exhibited increasing trends, suggesting a shift toward more osteoarthritic features in TKA patients with RA.*
Article Synopsis
- * The study analyzed data from 359 participants aged 71-80, finding that observer-derived K&L scores were better at predicting pain and function compared to minimum joint space measurements and osteophyte assessments, while ML-derived scores for women were comparable to expert scores.
- * The researchers suggest that using ML alongside expert evaluation for K&L scoring could enhance accuracy and efficiency in diagnosing knee OA.
Background: While fear of movement is an important predictor of pain and disability in osteoarthritis (OA), its impact on patients with hip OA remains uncertain. This study aimed to determine whether fear of movement, evaluated by the Tampa Scale for Kinesiophobia (TSK)-11, and pain catastrophizing, evaluated by the Pain Catastrophizing Scale (PCS), were associated with quality of life (QOL) in patients with hip OA.
Methods: This cross-sectional study was conducted between November 2017 and December 2018.
Purpose: Sagittal plane alignment is crucial for treating spinal malalignment and low back pain. Pelvic incidence-lumbar lordosis (PI-LL) mismatch is commonly used to evaluate clinical outcomes in patients with sagittal malalignment. The association between PI-LL mismatch and changes surrounding the intervertebral disc is very important to understand the compensatory mechanisms involved.
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- The article addresses the need for correction regarding the findings or claims made in the original research.
- It provides updated information that may alter the interpretation of the study's results.
- This correction is important for maintaining the integrity and accuracy of the academic record.