Sports Science Center, Tokyo Medical and Dental University (TMDU), 1-5-45 Yushima, Bunkyo-ku, Tokyo, 113-0034, Japan.
Japan Sports Agency, Tokyo, Japan.
Sci Rep. 2024 Aug 14;14(1):18903. doi: 10.1038/s41598-024-69971-7.
The KOJI AWARENESS (KA) screening test assesses motor function in humans. We aimed to analyze the correlation between age and KA screening scores and to identify the specific age at which a significant decline occurs. A total of 793 healthy participants (234 females) were interviewed for basic information on age and sex and completed the KA screening test. In addition to calculating the total score from the KA test, the scores were calculated for the neck-scapula-upper extremity-complex (NSU), trunk, and lower extremity (LE) segments. Spearman's rank correlation coefficient was used to assess the validity of the test. Additionally, Bayesian linear regression was employed to estimate the change point in KA scores, facilitating the identification of a critical age associated with a notable decline in motor function. KA screening total and separate body segment scores were negatively correlated with age in both gender (for female and male, KA total score, ρ = - 0.443, ρ = - 0.344; NSU segment, ρ = - 0.431, ρ = - 0.427; trunk segment, ρ = - 0.210, ρ = - 0.473; LE segment: ρ = - 0.43, ρ = - 0.507). Furthermore, a change-point analysis using linear regression analysis showed that KA screening total scores declined sharply at the age of 49.1(95% credible interval: 37.503, 68.366). The result show that total KA scores decrease - 0.196 (95% credible interval: - 0.335, - 0.049) for every 1 year of age increase, and for ages over 49.1, total KA scores additionally decrease - 0.255 (95% credible interval: - 0.485, - 0.054) for every 1 year of age increase. In the NSU segment, females showed a more rapid decline than males from the age of 50 years. KA screening test total scores declined sharply at the age of 49.1. These results may be useful in setting treatment goals, exercise, and lifestyle programs for age-related decline in motor function.
KOJI 意识（KA）筛查测试评估人类的运动功能。我们旨在分析年龄与 KA 筛查评分之间的相关性，并确定出现显著下降的特定年龄。共有 793 名健康参与者（234 名女性）接受了年龄和性别等基本信息的访谈，并完成了 KA 筛查测试。除了从 KA 测试中计算总分外，还计算了颈部-肩胛-上肢-复杂（NSU）、躯干和下肢（LE）段的分数。采用 Spearman 秩相关系数评估测试的有效性。此外，还采用贝叶斯线性回归来估计 KA 评分的变化点，有助于确定与运动功能明显下降相关的关键年龄。KA 筛查总分和单独的身体部位评分与性别呈负相关（对于女性和男性，KA 总分，ρ= - 0.443，ρ= - 0.344；NSU 段，ρ= - 0.431，ρ= - 0.427；躯干段，ρ= - 0.210，ρ= - 0.473；LE 段：ρ= - 0.43，ρ= - 0.507）。此外，使用线性回归分析的变化点分析表明，KA 筛查总分在 49.1 岁时急剧下降（95%可信区间：37.503，68.366）。结果表明，KA 总分每增加 1 岁，下降 0.196（95%可信区间：0.335，0.049），49.1 岁以上，KA 总分每增加 1 岁，再下降 0.255（95%可信区间：0.485，0.054）。在 NSU 段，女性从 50 岁开始比男性下降更快。KA 筛查测试总分在 49.1 岁时急剧下降。这些结果可能有助于为与年龄相关的运动功能下降制定治疗目标、锻炼和生活方式计划。
