Table 1 Chang reduction quality criteria (CRQC)

I. Alignment

 a. Anteroposterior view: normal or slightly valgus neck-shaft angle^a

1

 b. Lateral view: less than 20° of angulation

1

II. Displacement

 a. Anteroposterior view: neutral or positive medial cortical support^b

1

 b. Lateral view: smooth anterior cortical contact^c

1

Reduction quality

 Excellent

4

 Acceptable

2 or 3

 Poor

0 or 1