Table 2.

Intraobserver study of Cobbs’ angle values using 30 × 90 cm radiographs (Paired t-test)

	N	T values	Significance
Observer 1	40	0.968	<0.001
Observer 2	40	0.959	<0.001
Observer 3	40	0.961	<0.001
Observer 4	40	0.920	<0.001
Observer 5	40	0.984	<0.001
Observer 6	40	0.937	<0.001
Observer 7	40	0.960	<0.001
Observer 8	40	0.969	<0.001