Impact of Hemodialysis Catheter Dysfunction on Dialysis and Other Medical Services: An Observational Cohort Study

Table 2

Case-crossover analysis of medical services associated with catheter dysfunction.

Type of medical service	3 Case* sessions	3 Control** sessions	Odds ratio; (𝑃-value)	1 Case session	1 Control session	Odds ratio; (𝑃-value)
Missed session due to access problems	103	66	1.56 (<0.01)	94	56	1.68 (<0.01)
Access procedure
Limited definition***	301	234	1.29 (<0.01)	212	179	1.18 (0.10)
Expanded definition****	365	290	1.26 (<0.01)	289	226	1.28 (<0.01)
Missed session or access procedure	398	291	1.37 (<0.0001)	321	246	1.30 (<0.01)
Hospitalization (any diagnosis)	395	354	1.12 (0.13)	293	225	1.30 (<0.01)

*Sessions immediately prior to event, that is, sessions 1–3 prior to event.
**Sessions before case sessions, that is, sessions 4–6 prior to event.
***Consists of injection for catheter evaluation with fluoroscopy (36598); thrombolytic declotting of catheter (36593); mechanical removal of clot (36596); mechanical removal of intraluminal (intracatheter) obstructive material (75902); injection of “TPA” (J2997).
****Consists of those procedures included in the limited definition, plus tunneled catheter exchange or replacement (36581), and the combination of removal of tunneled catheter (36589) plus tunneled catheter insertion (36558).