Positive predictive value of International Classification of Diseases, 10th revision, diagnosis codes for cardiogenic, hypovolemic, and septic shock in the Danish National Patient Registry

Table 3 Positive predictive values in the Danish National Patient Registry with shock diagnoses, inotropic/vasopressor therapy among patients with shock, and shock from the combination of diagnoses and inotropic/vasopressor therapy

	Shock^a	No shock	Total number^b	Positive predictive value, % (95% CI)
Diagnosis code ^c
Shock	136	22	158	86.1 (79.7–91.1)
Cardiogenic shock	43	3	46	93.5 (82.1–98.6)
Hypovolemic shock	24	10	34	70.6 (52.5–84.9)
Septic shock	54	24	78	69.2 (57.7–79.2)
Procedure code ^c
Inotropes/vasopressors	67	5	72	93.1 (84.5–97.7)
Diagnosis code^c + inotropic/vasopressor code^c
Cardiogenic shock	24	1	25	96.0 (79.6–99.9)
Hypovolemic shock	9	4	13	69.2 (38.6–90.9)
Septic shock	28	6	34	82.4 (65.5–93.2)

^aShock defined as a confirmed overall shock or subtype of shock by medical chart review.
^bAll missing medical charts are excluded.
^cDNPR codes: shock overall (R570, R571, R572, A41.9A), cardiogenic shock (R570), hypovolemic shock (R571), septic shock (R572, A41.9A), and inotropes/vasopressors (BFHC92, BFHC93 (excluding BFHC93E-BFHC93H), BFHC95.
Abbreviation: CI Confidence interval.

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