Table 3.

Performance of linkage algorithms and thresholds

	Bespoke algorithm		ReclinkIII algorithm
	Conservative threshold = 21	Relaxed threshold = 20	Conservative threshold = 12	Relaxed threshold = 10
N linked	131	193	125	788
N true links	123	132	102	114
N false-matches	8	61	23	674
N missed-matches	68	59	89	77
Sensitivity % (95% CI)	64.4 (57.2–71.2)	69.1 (62.0–75.6)	53.4 (46.1–60.6)	59.7 (52.4–66.7)
Positive predictive value % (95% CI)	93.9 (86.6–96.3)	68.4 (61.3–74.8)	81.6 (73.7–87.9)	14.5 (12.1–17.1)