Completeness and positive predictive value of registration of upper limb embolectomy in the Danish National Vascular Registry

Figures & data

Table 1 Two-source capture–recapture method

NVR	NRP
	Registered cases	Nonregistered
Registered cases	a = 954	b = 35	a + b
Nonregistered	c = 149	d = (5)	c + d
	a + c	b + d

Notes: Cell numbers present cases with an operation of upper limb embolectomy confirmed by medical record review. The number in brackets presents the estimated number of embolectomy cases not registered in any of the two registries (= bc/a).

Abbreviations: NVR, the Danish National Vascular Registry; NRP, the Danish National Registry of Patients.

Figure 1 Distribution of medical record retrieval and review for the two registries.

Notes: 1, retrieved and confirmed embolectomy; 2, retrieved but procedure could not be verified; 3, could not be retrieved.

Figure 2 Distribution of registry source for population with confirmed embolectomy.

Notes: 1, Number of patients registered in both the Danish National Vascular Registry and the Danish National Registry of Patients; 2, Number of patients registered only in the Danish National Registry of Patients; 3, Number of patients registered only in the Danish National Vascular Registry; 4, Estimated number of patients not registered.