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Cost-effectiveness of occupational therapy for older adults: a protocol for an updated systematic review

Por: Kaneko · T. · Nagayama · H. · Ikeda · K. · Nakamura · T. · Niimi · A. · Inoue · N. · Takeda · T. · Uchida · J.
Introduction

The ageing populations in developed countries are a global concern, with increasing numbers of older adults facing physical, cognitive and psychological challenges, resulting in reduced quality of life and higher healthcare costs. Healthcare expenditure worldwide has been on the rise, especially among older adults, emphasising the importance of enabling independent living while reducing healthcare costs. Occupational therapy holds promising outcomes in promoting functional independence and enhancing the quality of life for older adults, but research on its cost-effectiveness remains limited. This systematic review aims to evaluate the recent evidence on the cost-effectiveness of occupational therapy interventions for older adults from a pragmatic perspective.

Methods and analysis

This systematic review will cover full economic evaluations, including cost-effectiveness, cost-utility and cost–benefit analyses, by reviewing randomised and cluster randomised controlled trials. The participants will be aged over 65 years without disease or disability restrictions. Primary outcomes will be assessed using functional status and quality-of-life assessments. Studies published before July 2023 will be searched in PubMed, Web of Science and Cumulative Index to Nursing and Allied Health Literature (CINAHL) databases, with no language restrictions.

Ethics and dissemination

Ethical approval is not required for this literature-based systematic review. The study’s findings will update the evaluation of occupational therapy’s cost-effectiveness in older adults and will be made public by publishing them in scholarly journals.

PROSPERO registration number

CRD42023453558.

High frequency of germline recombination in Nestin-Cre transgenic mice crossed with Glucagon-like peptide 1 receptor floxed mice

by Yusuke Kajitani, Takashi Miyazawa, Tomoaki Inoue, Nao Kajitani, Masamichi Fujita, Yukina Takeichi, Yasutaka Miyachi, Ryuichi Sakamoto, Yoshihiro Ogawa

The Cre-loxP strategy for tissue-specific gene inactivation has become a widely employed tool in several research studies. Conversely, inadequate breeding and genotyping without considering the potential for non-specific Cre-recombinase expression may lead to misinterpretations of results. Nestin-Cre transgenic mice, widely used for the selective deletion of genes in neurons, have been observed to have an incidence of Cre-line germline recombination. In this study, we attempted to generate neuron-specific Glucagon-like peptide 1 receptor (Glp1r) knock-out mice by crossing mice harboring the Nestin-Cre transgene with mice harboring the Glp1r gene modified with loxP insertion, in order to elucidate the role of Glp1r signaling in the nervous system. Surprisingly, during this breeding process, we discovered that the null allele emerged in the offspring irrespective of the presence or absence of the Nestin-Cre transgene, with a high probability of occurrence (93.6%). To elucidate the cause of this null allele, we conducted breeding experiments between mice carrying the heterozygous Glp1r null allele but lacking the Nestin-Cre transgene. We confirmed that the null allele was inherited by the offspring independently of the Nestin-Cre transgene. Furthermore, we assessed the gene expression, protein expression, and phenotype of mice carrying the homozygous Glp1r null allele generated from the aforementioned breeding, thereby confirming that the null allele indeed caused a global knock-out of Glp1r. These findings suggest that the null allele in the NestinCre-Glp1r floxed breeding arose due to germline recombination. Moreover, we demonstrated the possibility that germline recombination may occur not only during the spermatogenesis at testis but also during epididymal sperm maturation. The striking frequency of germline recombination in the Nestin-Cre driver underscores the necessity for caution when implementing precise breeding strategies and employing suitable genotyping methods.

Regional variation in the use of revascularisation for peripheral artery disease in Japan: a cross-sectional observational study

Por: Kanda · M. · Kuwabara · H. · Kitahara · H. · Kobayashi · Y. · Inoue · T.
Objectives

We aimed to investigate the regional variations in the number of interventions and surgeries for peripheral artery disease (PAD) and explore the major determinants of the variations.

Design

Cross-sectional study.

Setting

The Japanese Ministry of Health, Labour and Welfare National Database and Diagnostic Procedure Combination database in 2018.

Data

The rates of endovascular treatment (EVT), bypass surgery per 100 000 individuals in the population were calculated for all 47 prefectures in Japan. The total annual changes in the rates of EVT and bypass surgery in Japan from 2012 to 2019 were calculated.

Analysis

A linear regression model was developed with rates of EVT and bypass surgery as dependent variables and regional medical supply in each prefecture as explanatory variables. These regional factors included the rate of percutaneous coronary intervention (PCI) for angina, the numbers of cardiovascular specialists, specialists in cardiac surgery, interventional radiology (IVR) training facilities and cardiovascular surgery training facilities, per 100 000, respectively.

Results

There was a 5.7-fold difference (143 and 25 per 100 000 individuals aged ≥40 years) in the highest and lowest EVT rates. The highest and lowest rates of bypass surgery were 34 and

Conclusions

Considerable regional variations in the rates of revascularisation for PAD were found. Unbalanced presence of medical resources, preference of suppliers and the training system had larger effects on the regional variation in Japan.

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