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Background and aim <p>Parkinsonian disorders are hallmarked by gait and balance impairments. Atypical parkinsonian disorders (APD) develop postural instability with falls and gait disorders early on. Sensor-based gait recordings provide objective data in hospital and everyday life, improving mobility assessment accuracy. However, the impact of duration and distance of instrumented assessments on construct validity remains unclear. This exploratory study aims to evaluate the construct validity of gait assessments compared with clinical, functional, and patient-reported scores.</p> Methods <p>The multi-centered Mobility_APP study recruited 43 PD and 49 APD patients. Among others, the Berg Balance Scale (BBS) and the postural instability and gait difficulty score (PIGD) were collected. Sensor-based gait parameters were captured during standardized 2 × 10&#xa0;m and 2-min walk tests (2MWT) in the hospital and for 1&#xa0;day of physical activity monitoring (PAM) at home. PAM was categorized by short (10–30&#xa0;s), medium (30–60&#xa0;s), and long (≥ 60&#xa0;s) walking bouts (WB). Spearman correlations were applied to investigate associations between scores.</p> Results <p>Mean gait velocity (GV) and stride length correlated more strongly with functional, clinical, and patient-reported scores in 2MWT than in 2 × 10&#xa0;m. Additionally, the GV variability in the 2MWT correlated with BBS and PIGD (<i>r</i> = │0.3–0.7│), but was less prominent in 2 × 10&#xa0;m (<i>r</i> = │0.0–0.5│). In PAM, GV of long WB correlated more strongly with the PIGD (<i>r</i> = │0.5–0.6│) than short WB (<i>r</i> = │0.2–0.4│).</p> Conclusion <p>The 2MWT tended to show the highest construct validity. PAM offered complementary but weaker correlations, highlighting that PAM provides novel insights into daily life mobility of APD patients.</p>

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Construct validity of instrumented gait assessments in hospital and daily life mobility in patients with Parkinson’s disease and atypical Parkinson's syndromes: an exploratory study

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  • 出版模式：

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  • 发表日期：

    2026年2月9日

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  • I. Teckenburg,
  • V. Sidoroff,
  • H. Moradi,
  • S. Sapienza,
  • G. Prigent,
  • F. Krismer,
  • D. Benninger,
  • B. Eskofier,
  • M. Regensburger,
  • A. Ibrahim,
  • J. Klucken,
  • K. Aminian,
  • G. Wenning,
  • C. Raccagni,
  • J. Winkler,
  • H. Gaßner,
  • Patrick Bachmann,
  • Georg Göbel,
  • Helene Hummer,
  • Frank Jagusch,
  • Jean-Pierre Ndayisaba,
  • Gudrun Schoenherr,
  • Stefan Kiechl,
  • Werner Poewe,
  • Johanna Wüstner,
  • Anna Resch,
  • Svenja Schmidt,
  • Pascalle Hendriks,
  • Raphaela Greimann,
  • Hannah Huber,
  • Klaus Seppi,
  • Kathrin Kinscher,
  • Nina Hergenröder-Lenzner,
  • Jelena Jukic,
  • Sabine Stallforth,
  • Alexander German,
  • Christina Erhardt,
  • Patrick Süß,
  • Emily Adler,
  • Andrea Dötzer,
  • Ilaria Scarano,
  • Michaela Peranzoni,
  • Barbara Zaniboni,
  • Karin Voelkl,
  • Martina Bortolini,
  • Anisoara Paraschiv-Ionescu,
  • Marzieh Asalian,
  • Nils Roth,
  • Lisann Lieb,
  • Felix Kluge,
  • Marijus Giraitis,
  • Gelani Zelimkhanov,
  • Olena Tsurkalenko,
  • Eva-Tabea Schoenfeldt-Reichmann

摘要

Background and aim

Parkinsonian disorders are hallmarked by gait and balance impairments. Atypical parkinsonian disorders (APD) develop postural instability with falls and gait disorders early on. Sensor-based gait recordings provide objective data in hospital and everyday life, improving mobility assessment accuracy. However, the impact of duration and distance of instrumented assessments on construct validity remains unclear. This exploratory study aims to evaluate the construct validity of gait assessments compared with clinical, functional, and patient-reported scores.

Methods

The multi-centered Mobility_APP study recruited 43 PD and 49 APD patients. Among others, the Berg Balance Scale (BBS) and the postural instability and gait difficulty score (PIGD) were collected. Sensor-based gait parameters were captured during standardized 2 × 10 m and 2-min walk tests (2MWT) in the hospital and for 1 day of physical activity monitoring (PAM) at home. PAM was categorized by short (10–30 s), medium (30–60 s), and long (≥ 60 s) walking bouts (WB). Spearman correlations were applied to investigate associations between scores.

Results

Mean gait velocity (GV) and stride length correlated more strongly with functional, clinical, and patient-reported scores in 2MWT than in 2 × 10 m. Additionally, the GV variability in the 2MWT correlated with BBS and PIGD (r = │0.3–0.7│), but was less prominent in 2 × 10 m (r = │0.0–0.5│). In PAM, GV of long WB correlated more strongly with the PIGD (r = │0.5–0.6│) than short WB (r = │0.2–0.4│).

Conclusion

The 2MWT tended to show the highest construct validity. PAM offered complementary but weaker correlations, highlighting that PAM provides novel insights into daily life mobility of APD patients.