Kidney Week

Abstract: FR-PO0413

Dialysis Practice Patterns in Geriatric vs. Nongeriatric Patients on Hemodialysis: Insights from a Thai Multicenter Cohort

Session Information

• Dialysis: Measuring and Managing Symptoms and Syndromes
  November 07, 2025 | Location: Exhibit Hall, Convention Center
  Abstract Time: 10:00 AM - 12:00 PM

Category: Dialysis

• 801 Dialysis: Hemodialysis and Frequent Dialysis

Authors

• Pongsittisak, Wanjak, Faculty of Medicine Vajira Hospital, Bangkok, Thailand

Wanjak Pongsittisak, MD, MSc

• Phannajit, Jeerath, King Chulalongkorn Memorial Hospital, Bangkok, Thailand

Jeerath Phannajit, MD

• Kittanamongkolchai, Wonngarm, King Chulalongkorn Memorial Hospital, Bangkok, Thailand

Wonngarm Kittanamongkolchai, MD

• Tangwonglert, Theerasak, Phramongkutklao College of Medicine, Bangkok, Thailand

Theerasak Tangwonglert, MD

• Yoowannakul, Suree, Bhumibol Adulyadej Hospital, Bangkok, Thailand

Suree Yoowannakul, MD

• Chanchairujira, Thawee, Mahidol University Faculty of Medicine Siriraj Hospital, Bangkok, Thailand

Thawee Chanchairujira, MD

• Kiattisunthorn, Kraiwiporn, Mahidol University Faculty of Medicine Siriraj Hospital, Bangkok, Thailand

Kraiwiporn Kiattisunthorn, MD

• Vareesangthip, Kornchanok, Mahidol University Faculty of Medicine Siriraj Hospital, Bangkok, Thailand

Kornchanok Vareesangthip, MD

• Surattichaiyakul, Bongkod, Bhumirajanagarindra Kidney Institute Hospital, Bangkok, Thailand

Bongkod Surattichaiyakul, MD

• Nongnuch, Arkom, Mahidol University Faculty of Medicine Ramathibodi Hospital, Bangkok, Thailand

Arkom Nongnuch, MD

• Vongsanim, Surachet, Chiang Mai University Faculty of Medicine, Chiang Mai, Thailand

Surachet Vongsanim, MD

• Tonsawan, Pantipa, Khon Kaen University, Khon Kaen, Thailand

Pantipa Tonsawan, MD

• Sangthawan, Pornpen, Prince of Songkla University Faculty of Medicine, Songkla, Thailand

Pornpen Sangthawan, MD

• Changsirikulchai, Siribha, Srinakharinwirot University, Bangkok, Thailand

Siribha Changsirikulchai, MD, DrMed

• Phutrakool, Phanupong, Chulalongkorn University Faculty of Medicine, Bangkok, Thailand

Phanupong Phutrakool, PhD

• Thanapongsatorn, Peerapat, Thammasat University, Bangkok, Thailand

Peerapat Thanapongsatorn

• Kanjanabuch, Talerngsak, King Chulalongkorn Memorial Hospital, Bangkok, Thailand

Talerngsak Kanjanabuch, MD

• Sritippayawan, Suchai, Mahidol University Faculty of Medicine Siriraj Hospital, Bangkok, Thailand

Suchai Sritippayawan, MD, PhD

• Ophascharoensuk, Vuddhidej, Chiang Mai University Faculty of Medicine, Chiang Mai, Thailand

Vuddhidej Ophascharoensuk, MD, PhD

• Susantitaphong, Paweena, King Chulalongkorn Memorial Hospital, Bangkok, Thailand

Paweena Susantitaphong, MD, PhD

Background

Geriatric patients constitute a growing proportion of hemodialysis (HD) populations, yet differences in dialysis practices compared to younger patients remain unclear.

Methods

We analyzed baseline data from 675 HD patients enrolled in a multicenter prospective cohort in Thailand, comparing geriatric (≥65 yrs, n=317) with non-geriatric (<65 yrs, n=358) patients. Clinical data, lab parameters, dialysis prescriptions, and vascular access were compared.

Results

Geriatric patients were more often female (50.5% vs. 36.1%, p<0.001) and dialyzed primarily in-center (72.2% vs. 63.6%, p=0.005). They had lower weight (57.8 vs. 63.0 kg, p<0.001), creatinine (7.1 vs. 9.2 mg/dL, p<0.001), albumin (3.9 vs. 4.1 g/dL, p<0.001), and phosphate (4.1 vs. 4.7 mg/dL, p<0.001). Geriatric patients more commonly initiated dialysis via tunneled catheters (44.5% vs. 27.9%, p<0.001), had lower blood flow rates (300 vs. 350 mL/min, p=0.005), and higher dialysate potassium (3 mmol/L: 36.4% vs. 21.0%, p<0.001) and calcium (3 mmol/L: 21.2% vs. 13.0%, p=0.009). Dialysis frequency, session length, and vaccination rates were similar.

Conclusion

Geriatric HD patients in Thailand differ significantly in dialysis prescriptions and vascular access use, reflecting higher frailty and altered clinical management needs. Tailored protocols may optimize outcomes in this vulnerable population.

Funding

• Commercial Support – Apexala, Kirin

Digital Object Identifier (DOI)

• doi: 10.1681/ASN.2025xtnamyhd