論文No1855
Reference equation for the incremental shuttle walk test in Japanese adults
Masatoshi Itaki, Ryo Kozu, Kenichiro Tanaka, Hideaki Senjyu, The Clinical Pulmonary Functions Committee of the Japanese Respiratory SocietyThe Development Committee for Reference Values for the Field Walking Tests of the Japanese Society for Respiratory Care and Rehabilitation
Respiratory Investigation, Volume 56, Issue 6, November 2018, Pages 497-502
＜背景＞
漸増シャトル歩行試験(ISWT)は臨床、研究で広く用いられている。
しかし、健康な日本人成人でISWTの歩行距離(ISWD)を予測する参考式はない。
我々は日本人成人でISWDを予測する式を確立しようとした。
＜方法＞
590名の健康な日本人(237名が男性)を登録した。
全参加者はISWTを２回行い、身体的、臨床的データを、性別、年齢、身長、体重、BMIとともに収集した。
＜結果＞
参加者はISWTで640 [490–793] m歩行した。
ISWDは、年齢(r = – 0.51)、性別(r = 0.56)、体重(r = 0.39)、身長(r = 0.62)のすべてに相関したが(すべてp<0.001)、
BMIとは相関しなかった(r = – 0.01, p = 0.74)。
漸増多変量回帰モデルで、年齢、性別、身長は健康人におけるISWTの独立した予測因子であり、
ばらつきの50%を説明した。
ISWDの予測式は：
ISWD(m) = – 4.894 – 4.107 × Age (years) + 131.115 × Gender + 4.895 × Height (cm), where male gender = 1、となった。
＜感想＞
ISWDの予測式は正確で(R2 = 50%)、年齢、性別、身長と
いつでもデータを収集できる項目からなっており、臨床での活用が期待されます。
Background
The incremental shuttle walk test (ISWT) is widely used in clinical and research settings. However, there are no reference equations to predict the walk distance achieved in the ISWT (ISWD) for healthy Japanese adults. We aimed to establish a reference equation for the ISWD prediction in Japanese adults.
Methods
The sample comprised 590 healthy Japanese subjects (237 male). All subjects performed the ISWT twice, and their anthropometric and demographic data were collected, including gender, age, height, weight, and body mass index (BMI).
Results
Subjects walked 640 [490–793] m in the ISWT. The ISWD correlated (p < 0.001 for all) with age (r = – 0.51), gender (r = 0.56), weight (r = 0.39), and height (r = 0.62), but not with BMI (r = – 0.01, p = 0.74). The stepwise multiple regression model showed that age, gender, and height were independent contributors to the ISWT in healthy subjects, explaining 50% of the variability. The reference equation for the ISWD was: ISWD(m) = – 4.894 – 4.107 × Age (years) + 131.115 × Gender + 4.895 × Height (cm), where male gender = 1.
Conclusion
We have established a reference equation for the ISWD prediction in Japanese adults. The prediction accuracy was high (R2 = 50%), and a reference equation was established using anthropometric and demographic variables that can be easily assessed in clinical settings. The reference equation developed in this study will be useful for evaluating the magnitude of exercise intolerance in Japanese adults.