Tomkinson G R, Kidokoro T, Dufner T, Noi S, Fitzgerald J S, Mcgrath R P
Department of Education, Health and Behavior Studies, University of North Dakota, Grand Forks, ND, USA.
Alliance for Research in Exercise, Nutrition and Activity (ARENA), School of Health Sciences, University of South Australia, Adelaide, SA, Australia.
Age Ageing. 2020 Jul 1;49(4):634-639. doi: 10.1093/ageing/afaa021.
to estimate temporal trends in handgrip strength (HGS) for older Japanese adults between 1998 and 2017.
adults aged 60-79 years were included. Annual nationally representative HGS data (n = 176,449) for the 19-year study period were obtained from the Japanese Ministry of Education, Culture, Sports, Science and Technology. Temporal trends in mean HGS were estimated by sample-weighted regression models relating the year of testing to mean HGS. National trends in absolute, percent and standardised HGS were estimated by a post-stratified population-weighting procedure. Temporal trends in variability were estimated as the ratio of coefficients of variation (CVs).
collectively, there was a small improvement in mean HGS of 1.4 kg (95% confidence interval [CI]: 1.3-1.5), 4.5% (95%CI: 4.3-4.7) or 0.27 standard deviations (95%CI: 0.26-0.28) between 1998 and 2017. The rate of improvement progressively increased over time, with more recent values (post-2008) 1.5-fold larger than earlier values. Gender- and age-related temporal differences were negligible. Variability in HGS declined substantially over time (ratio of CVs [95%CI]: 0.88 [0.86-0.90]), with declines 1.9-fold larger in women compared to men and 1.7-fold larger in 70- to 79-year-olds compared to 60- to 69-year-olds.
there has been a small, progressive improvement in mean HGS for older Japanese adults since 1998, which is suggestive of a corresponding improvement in strength capacity. The substantial decline in variability indicates that the improvement in mean HGS was not uniform across the population.
评估1998年至2017年间日本老年成年人握力（HGS）的时间趋势。
纳入60 - 79岁的成年人。19年研究期间具有全国代表性的年度握力数据（n = 176,449）来自日本文部科学省。通过将测试年份与平均握力相关的样本加权回归模型来估计平均握力的时间趋势。通过事后分层人口加权程序估计绝对、百分比和标准化握力的全国趋势。将变异系数（CVs）的比率作为变异性的时间趋势进行估计。
总体而言，1998年至2017年间平均握力有小幅改善，增加了1.4千克（95%置信区间[CI]：1.3 - 1.5）、4.5%（95%CI：4.3 - 4.7）或0.27个标准差（95%CI：0.26 - 0.28）。改善率随时间逐渐增加，近期值（2008年后）比早期值大1.5倍。性别和年龄相关的时间差异可忽略不计。握力的变异性随时间大幅下降（CVs的比率[95%CI]：0.88[0.86 - 0.90]），女性下降幅度比男性大1.9倍，70至79岁人群比60至69岁人群大1.7倍。
自1998年以来，日本老年成年人的平均握力有小幅、渐进性的改善，这表明力量能力有相应提高。变异性的大幅下降表明平均握力的改善在人群中并不均匀。
