Validity of gout diagnosis in Swedish primary and secondary care - a validation study

Table 3 Frequencies of patients who had at least one, two, or three gout diagnoses and who met the cutoffs of the different classification criteria

Classification criteria sets	Primary care group			Rheumatology group
	n = 262	n = 84	n = 27	n = 132	n = 83	n = 62
	≥1 ICD-10 gout	≥2 ICD-10 gout	≥3 ICD-10 gout	≥1 ICD-10 gout	≥2 ICD-10 gout	≥3 ICD-10 gout
Rome, n	18	16	8	84	61	46
PPV%	7	19	30	64	73	74
95 % c.i.	4- 10	11-27	13 - 47	56 - 72	63 - 83	63 - 85
New York, n	9	7	3	80	57	44
PPV%	3	8	11	61	69	71
95% c.i.	1 - 5	2 - 14	0 - 22	53 - 69	59 - 79	60 - 82
ARA, n	54	45	19	90	65	51
PPV %	21	54	70	68	78	82
95% c.i.	16 - 26	43 - 65	53 - 87	60 - 76	69 - 87	72 - 92
Mexico, n	106	68	24	105	73	54
PPV%	40	81	89	80	88	87
95 % c.i.	34 - 46	73 - 89	77 - 101	73 - 87	81 - 95	79 - 95
Netherlands,n	110	67	24	94	63	43
PPV%	42	80	89	71	76	69
95 % c.i.	36 - 48	71 - 89	77 - 101	63 - 79	67 - 85	57 - 81

Data in the table are the positive predictive values (PPVs) with the corresponding 95% confidence interval (ci)

ISSN: 1471-2474