Table 1.

Measures of PDF

References	Measure	Benefits	Limitations
Lindsay, et al. 200625 Awuah, et al. 201328 Bossola, et al. 201327 Rayner, et al. 201429 Hussein, et al. 201731 Davenport, et al. 201830 Alvarez, et al. 20208 Brys, et al. 202026 Guerraoui, et al. 202120	Time to recovery from dialysis (TIRD) Patients were asked “how long does it take you to recover from a dialysis session?” No consensus between studies of how to report this, either as a continuous or a categorical measure	Easily interpreted, elicits a clear response, and stable on test-retest25 Has been used across several studies	Does not incorporate multiple dimensions of fatigue such as severity or frequency No consensus on how to report values Moderately associated with fatigue severity, quality of life, other dialysis-associated symptoms, psychosocial stressors, and ability to engage in social-leisure activity.25
Sklar, et al. 199617 Sklar, et al. 199816 Sklar, et al. 199915 Gordon, et al. 201118 Bossola, et al. 201823 Bossola, et al. 202024 Bossola, et al. 202322	Quantify duration, frequency, and intensity of fatigue on 5-point Likert scales If the average of these was ≥4 the patient was considered to have post-dialysis fatigue	Incorporates multiple dimensions of PDF Has been used across several studies	Variability between patients in interpreting Likert scales
Dubin, et al. 201319	Patients answering yes to “after most dialysis sessions, do you have fatigue for 2 hours or less?” were defined as having mild post-dialysis fatigue. Patients answering yes to “after most dialysis sessions, do you have fatigue for more than 2 hours?” were defined as having severe post-dialysis fatigue.	Simple and straightforward	Does not incorporate multiple dimensions of fatigue such as severity or frequency Does not capture total PDF duration
Guerraoui, et al. 202120	Assessed prevalence with a binary question Assessed intensity on a visual analog scale Assessed recovery time on a Likert scale	Assesses multiple dimensions of fatigue	Variability between patients in interpreting Likert scales and visual analog scales
Brys, et al. 202032	Used an experience sampling method to assess fatigue in real time via a smart phone app	Gathers data prospectively so is less limited by recall bias than other methods Patients reporting fatigue were separately asked about their degree of mental and physical fatigue Captures changes in a person’s level of fatigue over the course of a day	May not be accessible to all More time consuming than other methods

Abbreviations: PDF, post-dialysis fatigue; TIRD, time to recovery from dialysis