Patients whose kidneys still do some work do not necessarily need dialysis three times a week from the start. A Japanese center has now described, in detail, how it ran a program in which people began maintenance hemodialysis directly as outpatients on once- or twice-weekly schedules, with treatment frequency matched to residual kidney function rather than fixed by protocol. The report, published in BMC Nephrology, covers a full decade of practice at a single center and is among the rare accounts of how such an incremental program actually operates day to day.
The study was retrospective and descriptive. Researchers reviewed 70 consecutive adults who began maintenance hemodialysis between July 2013 and July 2023, of whom 61 — 87.1 percent — started directly as outpatients on the reduced schedule: 40 once weekly and 21 twice weekly. Nine patients who initiated conventional thrice-weekly hemodialysis were described separately and were not part of the incremental cohort. The median age of the incremental starters was 63 years, with an interquartile range of 49 to 72, and their median Charlson comorbidity index was 5.
Residual kidney function was central to the selection process. Measured creatinine clearance in the 58 patients with available data had a median of 4.32 mL/min. Crucially, the starting frequency was not assigned by a numeric threshold. Instead, each patient went through individualized written shared decision-making that weighed creatinine clearance, urine volume, nutritional status, comorbidities, the clinician’s judgment, adherence, activities of daily living, and the patient’s own preference. Conservative kidney management without dialysis was presented to every patient as an alternative; none chose it.
The program also ran on explicit operating rules rather than improvisation. Five prespecified criteria prompted a recommendation to increase the treatment frequency, giving the schedule a defined structure for escalation. This kind of documented rule set is what the authors identify as rarely described in the literature, even though incremental hemodialysis — aligning treatment frequency with residual kidney function — has been practiced in various forms for years.
Follow-up was substantial. Over 2,642 patient-months of observation, with a median follow-up of 39.1 months, nine patients died, six underwent transplantation by the study end, and three were lost to follow-up. Survival analysis began at the first outpatient incremental session, with death as the event; escalation to a higher frequency did not censor follow-up, and transplantation was censored on the transplantation date. Creatinine clearance and urine volume were analyzed on an available-case basis, reflecting the realities of routine clinical data.
No death occurred within the first 90 days of starting outpatient incremental hemodialysis. Survival was 98.2 percent at one year (95 percent confidence interval 88.0 to 99.7) and 87.3 percent at five years (71.2 to 94.7). These figures describe a single center’s experience without a concurrent comparison group, so they cannot be read as evidence that incremental initiation is safer or more effective than conventional thrice-weekly initiation.
The treatment pathways showed the expected pattern of gradual escalation. Thirty of the 40 patients who started once weekly transitioned to twice-weekly treatment, after a median of 6.1 months, and six moved directly to thrice-weekly treatment.
The report also included an economic scenario. Over 1,709 reconstructed incremental patient-months, the dialysis-delivery fee under the incremental schedule was 41.6 percent lower than the same exposure would have been if valued at the thrice-weekly rate. This is a fee-scenario calculation about delivery charges only, not a full economic evaluation; the authors are explicit that the findings do not establish lower total costs.
That caution runs through the paper’s conclusions. The authors state that direct outpatient once- or twice-weekly incremental hemodialysis was operationally sustained for a decade, but that selection based on residual kidney function, clinical stability, and patient preference — together with the absence of a concurrent comparator — limits interpretation to feasibility and treatment pathways. They note the findings do not establish comparative effectiveness, safety, preservation of residual kidney function, or lower total costs. For centers considering similar programs, the study’s main contribution is procedural: a documented decade of outpatient initiation, with written shared decision-making, defined escalation criteria, and transparent outcome reporting, offers a template that now awaits testing in comparative studies.
Subject of Research: Direct outpatient initiation of once- or twice-weekly incremental hemodialysis aligned with residual kidney function
Article Title: Direct outpatient initiation of once- or twice-weekly incremental hemodialysis: a ten-year single-center descriptive cohort of treatment pathways and a dialysis-delivery fee scenario
Article References: Takahashi, T., Kanazawa, Y., & Nakao, T. (2026). Direct outpatient initiation of once- or twice-weekly incremental hemodialysis: a ten-year single-center descriptive cohort of treatment pathways and a dialysis-delivery fee scenario. BMC Nephrology. https://doi.org/10.1186/s12882-026-05474-z
Image Credits: AI Generated
DOI: 10.1186/s12882-026-05474-z
Keywords: incremental hemodialysis, residual kidney function, outpatient dialysis initiation, shared decision-making, dialysis frequency, creatinine clearance, BMC Nephrology, dialysis delivery fees, treatment escalation, single-center cohort, kidney failure, survival outcomes
News Source: Jerry Hayes. (October 28, 2026). Ten-year single-center program shows direct outpatient start of once- or twice-weekly incremental hemodialysis is operationally feasible. Scienmag.
