Table 2.

Sensitivity and specificity of plain radiographs in normal C-S distance at different angles of tilt in the diagnosis of retroversion according to the crossover sign.

Angle of tilt	Sensitivity (%)	Specificity (%)
0 degrees	100.0	80.0
2 degrees	80.0	66.6
4 degrees	60.0	66.6
6 degrees	42.8	72.7
8 degrees	12.5	88.9
10 degrees	0.0	100.0