Table 2.

Test characteristics of subclinical inflammation and inflammatory arthritis development within 1 year

	Sensitivity	Specificity	PPV	NPV	Accuracy	AUC
Feet (MTP 1-5)
Tenosynovitis	29	95	52	89	86	0.62
	(18; 42)	(92; 97)	(34; 69)	(85; 92)	(82; 89)
Synovitis	37	83	26	88	76	0.60
	(25; 50)	(78; 86)	(18; 38)	(84; 92)	(71; 80)
BMO	27	85	24	87	77	0.56
	(17; 40)	(81; 89)	(15; 36)	(83; 91)	(72; 81)
Any inflammation	38	89	38	89	82	0.64
	(26; 52)	(85; 92)	(26; 51)	(86; 92)	(77; 85)
Hands (MCP 2–5 and wrist)
Tenosynovitis	65	80	36	93	78	0.73
	(52; 77)	(75; 84)	(27; 46)	(89; 96)	(73; 82)
Synovitis	29	85	25	88	77	0.57
	(18; 42)	(81; 89)	(16; 37)	(83; 91)	(72; 81)
BMO	29	86	26	88	78	0.58
	(18; 42)	(82; 90)	(17; 39)	(83; 91)	(73; 82)
Any inflammation	77	66	28	94	68	0.71
	(64; 86)	(60; 71)	(21; 36)	(90; 97)	(62; 72)
Hands and feet
Tenosynovitis	67	79	35	93	77	0.73
	(54; 78)	(74; 83)	(26; 45)	(90; 96)	(72; 81)
Synovitis	42	81	28	89	76	0.62
	(30; 56)	(77; 85)	(19; 39)	(85; 92)	(71; 80)
BMO	48	64	18	88	61	0.56
	(35; 61)	(58; 69)	(13; 26)	(83; 91)	(56; 66)
Any inflammation	77	62	26	94	64	0.69
	(64; 86)	(56; 67)	(19; 33)	(90; 97)	(59; 69)

Test characteristics and their corresponding 95% intervals are shown. All values are percentages, except for the AUC. NPV: negative predictive value; PPV: positive predictive value.