Table 1.

Outcome by catheter management

Parameter	Replaced	Salvage Attempted		P
		First	Subsequent
Total	49	115	39
Recurrences (n [%])	4 (8.1)	38 (33.0)	21 (53.8)	0.02
Complications (n [%])	7 (14.3)	1 (0.9)	3 (7.7)	0.05

Catheter replacement is associated with lower recurrence rates but more complications; this is because complications are largely restricted to those whose clinical presentation is more severe, who are therefore selected for catheter replacement. If the first salvage attempt fails, then subsequent salvage attempts are followed by a greater likelihood of recurrence, as well as complications. P values refer only to the difference between first and subsequent salvage outcomes.