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February 12, 2026Renal Replacement Therapy1 citationsOpen Access

The impact of planned versus unplanned initiation of hemodialysis on physical function during hospitalization in patients with end-stage renal disease

ANArisa NagataHYHiroki YabeRTRen Takahashi

Key Result

Unplanned hemodialysis initiation was associated with lower Barthel Index at admission (83.0 vs 92.6, p=0.029), higher Clinical Frailty Scale (4.8 vs 3.9, p=0.038), lower SPPB gait scores (2.1 vs 3.7, p=0.026), and longer hospital stay (38.8 days vs 14.5 days, p=0.001) compared to planned initiation.

Key Points

  • To examine how planned versus unplanned initiation of hemodialysis affects patients' physical function during hospitalization.
  • Conducted a single-center retrospective cohort study.
  • Included 32 patients with chronic kidney disease starting hemodialysis.
  • Assessed physical function at admission and discharge using multiple standardized measures.
  • Applied unpaired t-tests or χ2 tests for group comparisons.
  • Unplanned group had lower Barthel Index scores (83.0 vs 92.6) and higher Clinical Frailty Scale scores (4.8 vs 3.9).
  • SPPB gait scores were significantly lower in the unplanned group (2.1 vs 3.7).
  • The length of hospital stay was longer in the unplanned group (38.8 days vs 14.5 days).
  • Improvements in physical function were observed in both groups, but the planned group had greater gains in grip strength.

Study Design

Type

Cohort (n=32)

Multicenter

No

Structured PICO

Does unplanned initiation of hemodialysis impair physical function and activities of daily living compared to planned initiation in patients with end-stage renal disease?

P
Population
32 patients with chronic kidney disease who started hemodialysis (mean age 71.1, 71.9% male) at a single center in Japan.
I
Intervention
Unplanned initiation of hemodialysis (n=14)
C
Comparator
Planned initiation of hemodialysis (n=18)
O
Outcome
Physical function and activities of daily living (ADL) during the induction phase, assessed by Barthel Index, FIM mobility score, 10-m walking speed, grip strength, isometric knee extensor strength, SPPB, and Clinical Frailty Scalesurrogate

Unplanned initiation of hemodialysis is associated with worse physical function, higher frailty, and limited functional recovery during hospitalization compared to planned initiation.

Main Result

Effect estimate: p=0.029 for BI at admission; p=0.026 for SPPB gait; p=0.038 for CFS; p=0.001 for length of hospital stay

Absolute Event Rate: 83% vs 92.6%

p-value: p=0.029

Limitations

  • Single-center study with small sample size (n=32) limiting generalizability and preventing subgroup analyses
  • Retrospective study design with potential for selection bias
  • Heterogeneity in the unplanned group with varying acute clinical conditions at dialysis initiation
  • Missing data for some laboratory values (e.g., BNP) limiting full comparison
  • Did not assess catabolic effects of inflammation and malnutrition in detail
  • Small sample size
  • Single-center retrospective design
  • Missing BNP data at admission

Abstract

Abstract Background This study aimed to examine the impact of planned versus unplanned initiation of hemodialysis on physical function and activities of daily living (ADL) during the induction phase. Methods This single-center retrospective cohort study was conducted at Shizuoka Saiseikai General Hospital. Thirty-two patients with chronic kidney disease who started hemodialysis between June 2022 and August 2023 were included and classified into either the planned or unplanned initiation group. Physical function was assessed at admission and discharge using the Barthel Index (BI), Functional Independence Measure (FIM) mobility score, 10-m walking speed (10MWS), grip strength, isometric knee extensor strength (IKES), Short Physical Performance Battery (SPPB), and Clinical Frailty Scale (CFS). Comparisons between groups in the planned initiation and unplanned initiation groups were made using the unpaired t -test or χ 2 test, and linear mixed models were used for pre- and post-admission and discharge comparisons. Results Compared with the planned group, the unplanned initiation group showed significantly lower BI scores (83.0 versus 92.6, p = 0.029), lower SPPB gait scores (2.1 versus 3.7, p = 0.026), and higher CFS scores (4.8 versus 3.9, p = 0.038) at admission. The length of hospital stay was also significantly longer in the unplanned group (38.8 days versus 14.5 days, p = 0.001). Although the unplanned group demonstrated improvements in BI and grip strength during hospitalization, the gain in grip strength was significantly smaller than in the planned group. Conclusions Unplanned hemodialysis initiation was associated with impaired physical function, higher frailty, limited functional recovery through rehabilitation, and prolonged hospitalization. These findings highlight the need for early and structured rehabilitation interventions in patients undergoing unplanned dialysis initiation to mitigate physical decline during the induction phase.

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Cite This Study

Nagata et al. (2026) conducted a cohort in Patients with chronic kidney disease initiating hemodialysis, adults with end-stage renal disease (n=32). Unplanned hemodialysis initiation vs. Planned hemodialysis initiation was evaluated on Physical function at admission and discharge measured by Barthel Index (BI), Short Physical Performance Battery gait score (SPPB gait), Clinical Frailty Scale (CFS), grip strength, length of hospital stay (p=0.029 for BI at admission; p=0.026 for SPPB gait; p=0.038 for CFS; p=0.001 for length of hospital stay, p=0.029). Unplanned hemodialysis initiation was associated with lower Barthel Index at admission (83.0 vs 92.6, p=0.029), higher Clinical Frailty Scale (4.8 vs 3.9, p=0.038), lower SPPB gait scores (2.1 vs 3.7, p=0.026), and longer hospital stay (38.8 days vs 14.5 days, p=0.001) compared to planned initiation.

synapsesocial.com/papers/698d6d445be6419ac0d52275https://doi.org/10.1186/s41100-026-00706-2
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