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Purpose <p>The aim of this study is to describe nationwide trends in clinical complexity, principal diagnoses, and in-hospital outcomes among centenarian hospital admissions in Spain, from 2004 to 2020.</p> Methods <p>This study is a retrospective, population-based study using the Spanish National Hospital Discharge Database. All unplanned admissions of patients aged ≥ 100&#xa0;years were analyzed across three periods (2004–2010, 2011–2015, 2016–2020). Trends in comorbidity, diagnoses, complications, mortality, and length of stay (LOS) were assessed using joinpoint regression models.</p> Results <p>A total of 43,730 hospital admissions were analyzed. The prevalence of severe comorbidity rose from 17.6 to 31.8% (<i>p</i> &lt; 0.001), and multimorbidity from 61.4 to 76.6% (<i>p</i> &lt; 0.001), with parallel rises in dementia and other frailty-related conditions. Infections became the leading cause of admission (<i>p</i> &lt; 0.001), particularly respiratory (from 18.4 to 26.1%), and urinary infections (from 4.2 to 7.9%). All types of in-hospital complications rose steadily, with an upward trend in patients with ≥ 3 complications, especially in the last 5&#xa0;years (Annual percent changes (APC) = 14.9%; 95% confidence interval (CI) 9.7%; 20.4%) and among women (APC = 15.9%; 95% CI 10.7%; 21.5%). In-hospital mortality rose modestly (APC = 1.0%; 95% CI 0.5%; 1.6%), while average LOS decreased from 8.7 ± 10.5 to 7.3 ± 7.3&#xa0;days (<i>p</i> &lt; 0.001). Discharges to nursing homes increased from 2.1 to 4.8% (<i>p</i> &lt; 0.001).</p> Conclusion <p>Centenarians admitted to Spanish hospitals over the last two decades showed increasing clinical complexity and complications, with infections as the leading cause of admission and a modest rise in mortality despite a shorter LOS. These findings highlight the need to adapt healthcare models for this growing and vulnerable population.</p>

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Trends in hospital admissions and clinical complexity in centenarians: a nationwide population-based study in Spain (2004–2020)

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  • 发表日期：

    2025年11月25日

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  • Juan Carlos Piñeiro-Fernández,
  • Ramón Rabuñal-Rey,
  • Eva Romay-Lema,
  • Yelco Chantres-Legaspi,
  • Ana María Santos-Martínez,
  • Yoana Besteiro-Balado,
  • Roi Suárez-Gil,
  • Sonia Pértega-Díaz

摘要

Purpose

The aim of this study is to describe nationwide trends in clinical complexity, principal diagnoses, and in-hospital outcomes among centenarian hospital admissions in Spain, from 2004 to 2020.

Methods

This study is a retrospective, population-based study using the Spanish National Hospital Discharge Database. All unplanned admissions of patients aged ≥ 100 years were analyzed across three periods (2004–2010, 2011–2015, 2016–2020). Trends in comorbidity, diagnoses, complications, mortality, and length of stay (LOS) were assessed using joinpoint regression models.

Results

A total of 43,730 hospital admissions were analyzed. The prevalence of severe comorbidity rose from 17.6 to 31.8% (p < 0.001), and multimorbidity from 61.4 to 76.6% (p < 0.001), with parallel rises in dementia and other frailty-related conditions. Infections became the leading cause of admission (p < 0.001), particularly respiratory (from 18.4 to 26.1%), and urinary infections (from 4.2 to 7.9%). All types of in-hospital complications rose steadily, with an upward trend in patients with ≥ 3 complications, especially in the last 5 years (Annual percent changes (APC) = 14.9%; 95% confidence interval (CI) 9.7%; 20.4%) and among women (APC = 15.9%; 95% CI 10.7%; 21.5%). In-hospital mortality rose modestly (APC = 1.0%; 95% CI 0.5%; 1.6%), while average LOS decreased from 8.7 ± 10.5 to 7.3 ± 7.3 days (p < 0.001). Discharges to nursing homes increased from 2.1 to 4.8% (p < 0.001).

Conclusion

Centenarians admitted to Spanish hospitals over the last two decades showed increasing clinical complexity and complications, with infections as the leading cause of admission and a modest rise in mortality despite a shorter LOS. These findings highlight the need to adapt healthcare models for this growing and vulnerable population.