Table 4.

Inter-observer and intra-observer agreement without the consensus atlas, and with use of the consensus atlas regarding the Pettersson score at joint level and the Pettersson score at patient level

	Pettersson score at joint level		Pettersson score at patient level
	Without atlas	With atlas	Without atlas	With atlas
Results regarding all Pettersson scores
Inter-observer	±1.7 (>3)	±1.1 (>2)	±6.5 (>13)	±3.2 (>6)
Intra-observer	–	±0.9 (>2)	–	±2.4 (>5)
Subgroup analysis of abnormal Pettersson scores only
Inter-observer	±2.1 (>4)	±1.5 (>3)	±6.9 (>14)	±3.4 (>7)
Intra-observer	–	±1.3 (>3)	–	±2.6 (>5)

Values represent the limits of agreement from the mean (minimal detectable difference)