Table 4.

Average Accuracy, Sensitivity, and Specificity, Including 95% Confidence Intervals, of the Readers in Both Modalities for a Number of Clinically Relevant Criteria, Using as Ground Truth the Readings Provided by the Osteoarthritis Initiative Study.

	Unaided			Aided
	Accuracy	Sensitivity	Specificity	Accuracy	Sensitivity	Specificity
JSN > 0	0.65 (0.60, 0.70)	0.97 (0.95, 0.99)	0.11 (0.06, 0.17)	0.76 (0.72, 0.80)	0.97 (0.95, 0.99)	0.41 (0.32, 0.49)
KL > 0	0.80 (0.76, 0.84)	0.97 (0.95, 0.99)	0.10 (0.03, 0.18)	0.86 (0.82, 0.89)	0.97 (0.94, 0.99)	0.40 (0.29, 0.52)
KL > 1	0.76 (0.72, 0.81)	0.83 (0.77, 0.87)	0.65 (0.58, 0.73)	0.82 (0.78, 0.85)	0.78 (0.73, 0.83)	0.88 (0.82, 0.93)
KL > 2	0.83 (0.79, 0.87)	0.68 (0.60, 0.76)	0.92 (0.88, 0.95)	0.91 (0.88, 0.94)	0.81 (0.74, 0.87)	0.96 (0.94, 0.98)
OS > 0	0.76 (0.71, 0.80)	0.84 (0.79, 0.88)	0.50 (0.39, 0.61)	0.84 (0.80, 0.88)	0.88 (0.84, 0.91)	0.73 (0.63, 0.82)
OS > 1	0.79 (0.75, 0.83)	0.65 (0.58, 0.73)	0.88 (0.84, 0.92)	0.84 (0.81, 0.88)	0.71 (0.64, 0.77)	0.94 (0.90, 0.97)
SC > 0	0.54 (0.49, 0.59)	0.97 (0.95, 0.99)	0.11 (0.07, 0.15)	0.60 (0.55, 0.65)	0.97 (0.94, 0.99)	0.24 (0.18, 0.30)
SC > 1	0.72 (0.67, 0.76)	0.80 (0.73, 0.88)	0.68 (0.62, 0.74)	0.88 (0.84, 0.91)	0.77 (0.68, 0.84)	0.92 (0.89, 0.96)

JSN = joint space narrowing; KL = Kellgren-Lawrence; OS = osteophytes; SC = sclerosis.