Table 2.

Comparison of coracoclavicular and acromioclavicular distance in the single PET and the double PET group measured from preoperative and two-year postoperative radiographs

Group		CC distance(mm)				AC distance(mm)
	Preoperative(AS)	Postoperative(AS)	Preoperative(HS)	P a	P b	Preoperative(AS)	Postoperative(AS)	Preoperative(HS)	P a′	P b′
Single PET	13.5 ± 2.8	9.3 ± 1.7	7.8 ± 1.5	<.001	.377	5.7 ± 1.1	2.4 ± 0.8	1.6 ± 0.7	<.001	<.001
Double PET	14.1 ± 3.3	7.6 ± 2.1	7.4 ± 1.9	<.001	0.274	5.4 ± 1.3	1.5 ± 0.9	1.3 ± 0.6	<.001	0.484
P	> 0.05	<.001	.766	–	–	.843	<.001	.356

AS affected shoulder, HS healthy shoulder; p^a and p^a’ refer to the respective comparison of the coracoclavicular and acromioclavicular distance of the affected shoulder joints measured preoperatively and postoperatively. p^b and p^b’ refer to the respective comparison of the coracoclavicular and acromioclavicular distances of the affected shoulder joints measured postoperatively and the healthy shoulder joints measured preoperatively. P refers to the comparison of the single PET and the double PET group