Diagnostic codes of cancer in Skåne healthcare register: a validation study using individual-level data in southern Sweden

Table 2 Positive Predictive value (PPV), sensitivity, AUC (area under the curve) and their 95% confidence intervals (CI) of all cancer patients according to level of healthcare, using the Swedish Cancer Register as ‘gold standard’ reference

	Number of cancer patients in SHR	PPV (95%CI), %	Sensitivity (95%CI), %	AUC (95%CI), a scale ranging from 0.5–1.0
All levels of health care^a	87,650	63.76 (63.44–64.08)	90.58 (90.35–90.81)	0.94 (0.94–0.94)
By level of health care, according to first diagnosis in each level^b
Primary care	22,769	70.05 (69.45–70.64)	25.85 (25.51–26.20)	0.63 (0.63–0.63)
Specialized outpatient care	80,358	66.32 (66.00–66.65)	86.39 (86.12–86.66)	0.92 (0.92–0.92)
Specialized inpatient care	48,052	89.17 (88.89–89.45)	69.46 (69.09–69.82)	0.85 (0.84–0.85)
By level of health care, according to priority of care^c
1) Specialized inpatient care	48,052	89.17 (88.89–89.45)	69.46 (69.09–69.82)	0.85 (0.84–0.85)
2) Specialized outpatient care	35,861	35.16 (34.67–35.66)	20.44 (20.12–20.76)	0.59 (0.59–0.60)
3) Primary care	3737	11.37 (10.37–12.43)	0.69 (0.63–0.76)	0.50 (0.50–0.50)

^aIf multiple records, we counted the first primary diagnosis of cancer for each patient
^bPatients could be counted once at each level of care, and three times at maximum among all levels of care
^cMaximum one time per patient. The priority was given to: inpatient specialist care > outpatient specialist care > primary care

ISSN: 1471-2407