Table 3.

Intraobserver study of Cobbs’ angle values using 30 × 90 cm radiographs (Spearman correlation study)

	N	R values	Significance
Observer 1	40	0.972	<0.001
Observer 2	40	0.954	<0.001
Observer 3	40	0.957	<0.001
Observer 4	40	0.933	<0.001
Observer 5	40	0.985	<0.001
Observer 6	40	0.932	<0.001
Observer 7	40	0.966	<0.001
Observer 8	40	0.963	<0.001