Table 1.

Validity of the ICD-10 Diagnosis Codes for Pyogenic Liver Abscess (K75.0) Among 292 Patients in the North Denmark Region from January 1, 2010, to June 30, 2022. The Table Shows the Numbers of Correctly and Misclassified Diagnoses, as Well as the Positive Predictive Values (PPV) by Hospitals and Departments

	Patients, n	Correct, n	Misclassified, n	PPV, % (95% CI)
All patients	292	225	67	77 (72–82)
Emergency ward	16	9	7	56 (30–80)
Surgical department	139	96	43	69 (61–77)
Medical department	137	120	17	88 (81–93)
Aalborg University hospital	221	178	43	81 (75–86)
Emergency ward	7	4	3	57 (18–90)
Surgical department	108	76	32	70 (61–79)
Medical department	106	98	8	93 (86–97)
The Regional hospitals	71	47	24	66 (54–77)
Emergency ward	9	5	4	56 (21–86)
Surgical department	31	20	11	65 (45–81)
Medical department	31	42	9	71 (52–86)