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Purpose <p>This study aimed to investigate associated factors and cutoff values for instrumental activities of daily living (IADL) in older people using daycare centers and to clarify the characteristics of the low IADL group.</p> Methods <p>This multicenter cross-sectional study included 196 consecutive individuals receiving rehabilitation at two daycare centers between January and March 2024. Participants were ≥ 65&#xa0;years old, able to walk, and provided consent. Excluded were those who did not wear an accelerometer or who missed more than two weeks of rehabilitation. Unpaired <i>t</i>-test, Mann–Whitney U test, and chi-square test were used to examine the characteristics of the low IADL group. Multiple regression analysis was used to determine the associated factors of IADL, with IADL as the objective variable and age, sex, nutritional status, timed up and go test (TUG), light physical activity (LPA), and fall-related efficacy as explanatory variables. Cutoff values for low IADL were calculated using receiver operating characteristic curves.</p> Results <p>The low IADL group (n = 64) had significantly higher TUG, and lower gait speed, LPA, and fall-related efficacy than the high IADL group (n = 23) (p &lt; 0.05). Multiple regression analysis identified TUG, LPA, and fall-related efficacy as factors associated with IADL (p &lt; 0.01). Cutoff values calculated for low IADL were TUG ≥ 11.6&#xa0;s, LPA &lt; 193.4&#xa0;min, and fall-related efficacy &lt; 125.5 points (p &lt; 0.05).</p> Conclusion <p>Associated factors and cutoff values for IADL in older daycare center users and characteristics of the low IADL group were identified that may aid in devising interventions to maintain and improve IADL in this population.</p>

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Relationship between IADL, physical function, physical activity, and fall-related efficacy among older people using daycare centers

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年8月16日

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  • Masahiro Kitamura,
  • Kazuhiro P. Izawa,
  • Kyohei Kurihara,
  • Sayaka Yamamoto,
  • Satoshi Ozawa,
  • Erina Uchida,
  • Junichi Umeo

摘要

Purpose

This study aimed to investigate associated factors and cutoff values for instrumental activities of daily living (IADL) in older people using daycare centers and to clarify the characteristics of the low IADL group.

Methods

This multicenter cross-sectional study included 196 consecutive individuals receiving rehabilitation at two daycare centers between January and March 2024. Participants were ≥ 65 years old, able to walk, and provided consent. Excluded were those who did not wear an accelerometer or who missed more than two weeks of rehabilitation. Unpaired t-test, Mann–Whitney U test, and chi-square test were used to examine the characteristics of the low IADL group. Multiple regression analysis was used to determine the associated factors of IADL, with IADL as the objective variable and age, sex, nutritional status, timed up and go test (TUG), light physical activity (LPA), and fall-related efficacy as explanatory variables. Cutoff values for low IADL were calculated using receiver operating characteristic curves.

Results

The low IADL group (n = 64) had significantly higher TUG, and lower gait speed, LPA, and fall-related efficacy than the high IADL group (n = 23) (p < 0.05). Multiple regression analysis identified TUG, LPA, and fall-related efficacy as factors associated with IADL (p < 0.01). Cutoff values calculated for low IADL were TUG ≥ 11.6 s, LPA < 193.4 min, and fall-related efficacy < 125.5 points (p < 0.05).

Conclusion

Associated factors and cutoff values for IADL in older daycare center users and characteristics of the low IADL group were identified that may aid in devising interventions to maintain and improve IADL in this population.