Search

Aim: The present study aimed to examine whether dietary diversity is associated with cognitive impairment, including mild cognitive impairment (MCI), in community‐dwelling older Japanese adults. Methods: This cross‐sectional study was carried out in a general community setting. MCI and global cognitive impairment (GCI) were assessed using the Mini‐Mental State Examination and National Center for Geriatrics and Gerontology‐Functional Assessment Tool, which are multicomponent neurocognitive tests that include memory attention, executive function and processing speed. Dietary diversity was assessed using the diet variety score. The diet variety score assessed the 1‐week consumption frequency of 10 food groups, and either 0 or 1 point was allocated to each category based on the following responses: (i) "eat almost every day" (1 point); and (ii) "not eaten almost daily" (0 points). Older adults with a diet variety score of ≥3 points were defined as having high dietary diversity. Results: Data included 8987 older adults (mean age 73.9 ± 5.5 years; men 44.3%). The overall prevalences of MCI and GCI were 17.1% (n = 1538) and 8.4% (n = 753), respectively. The proportion of patients with a high dietary diversity was 69.9% (n = 6286). Multinomial logistic regression analysis revealed high dietary diversity was associated with MCI (OR 0.83, 95% CI 0.73–0.94) and GCI (OR 0.77, 95% CI 0.65–0.92) after adjusting for covariates. Conclusions: This study had a large sample size of older Japanese adults, and showed that high dietary diversity was associated with a lower proportion of MCI and GCI among older adults. Geriatr Gerontol Int 2024; 24: 75–81. [ABSTRACT FROM AUTHOR]

Background: This study aimed to examine whether physical activity measured using the International Physical Activity Questionnaire Short Form (IPAQ-SF) can predict incident disability in Japanese older adults. Methods: Community-dwelling older adults participated in a prospective cohort survey. The time spent in moderate- to vigorous-intensity physical activity was assessed at the survey baseline using the IPAQ-SF. The participants were categorized into those who spent ≥150 minutes per week (physically active) or <150 minutes per week (physically inactive) in moderate- to vigorous-intensity physical activity. Incident disability was monitored through Long-Term Care Insurance certification during a follow-up lasting 5 years. Results: Among the 4387 analyzable participants (mean age = 75.8 y, 53.5% female), the IPAQ-SF grouped 1577 (35.9%) and 2810 (64.1%) participants as those who were physically active and inactive, respectively. A log-rank test showed a significantly higher incidence of disability among the inactive group of participants (P <.001). The Cox proportional hazards model showed that physically inactive participants had a higher risk of incident disability than the physically active ones did, even after adjusting for covariates (hazard ratio, 1.24; 95% CI, 1.07–1.45, P <.001). Conclusions: Older adults identified as physically inactive using the IPAQ-SF had a greater risk of developing disabilities than those identified as physically active. The IPAQ-SF seems to be appropriate to estimate the incidence risk of disability. [ABSTRACT FROM AUTHOR]

Aim: The aim of this study was to determine the risk factors for household transmission of the omicron variant of SARS‐CoV‐2. Background: The household infection rate has been reported to be higher for the omicron variant than for non‐omicron variants of SARS‐CoV‐2. Determination of the risk factors for household transmission of the omicron variant is therefore important. Design: A Retrospective Cohort Study was conducted. Methods: When family members of health care workers (HCWs) were found to be infected with SARS‐CoV‐2, the HCWs had to receive two nucleic acid amplification tests for SARS‐CoV‐2: immediately after and 5 to 10 days after the onset of COVID‐19 in the family members. Risk factors of household transmission were analysed by comparing cases (HCWs infected with SARS‐CoV‐2) and controls (HCWs not infected with SARS‐CoV‐2) using multivariable analysis. Results: Unvaccinated status (OR: 3.97), age of index cases (≤6 years) (OR: 1.94) and staying at home with index cases (OR: 10.18) were risk factors for household transmission. Conclusion: If there is a strong desire to avoid household infection, family members infected with SARS‐CoV‐2 should live separately during the period of viral shedding. Summary statement: What is already known about this topic? During the COVID‐19 pandemic, nurses have been exposed to SARS‐CoV‐2 not only from COVID‐19 patients but also from family members infected with SARS‐CoV‐2 but prevention of SARS‐CoV‐2 infection to nurses is important to maintain health services function.The household infection rate was reported to be higher for the omicron variant (42.7%) than for non‐omicron variants (36.4% for Alpha, 29.7% for Delta and 22.5% for Beta). Determination of the risk factors for household transmission of the omicron variant is therefore important. What this paper adds? Unvaccinated HCWs had higher transmission rates (OR: 3.97, 95% CI: 1.22–12.88) than those of HCWs who received more than two doses of BNT162b2 or mRNA‐1273 mRNA COVID‐19 vaccines.Index cases aged 6 years or younger had higher transmission rates (OR: 1.94, 95% CI: 1.13–3.35) than those of index cases aged 7 years or older.The odds of transmitting to HCWs was higher (OR: 10.18, 95% CI: 2.98–34.72) for HCWs who stayed at home with the index cases than for HCWs who spent time in a different building from the index cases. The implications of this paper: If there is a strong desire to avoid household infection, family members infected with SARS‐CoV‐2 should live separately during the period of viral shedding. [ABSTRACT FROM AUTHOR]