Table 3.

Abduction test—comparison between groups

Unpaired T-test (between groups)—abduction test
	Approach	N	Mean	Mean difference	SD	95% CI		P-Value
						Lower	Upper
Normal	PA	22	6.764	0.1636	0.5844	-0.1828	0.5101	0.345
	DLA	20	6.6		0.5201
Pre-op	PA	22	2.309	0.1691	0.5362	-0.1676	0.5057	0.316
	DLA	20	2.14		0.5423
2 weeks post-op	PA	22	3.6	0.31	0.345	0.1191	0.5009	0.002
	DLA	20	3.29		0.2553
6 weeks post-op	PA	22	4.318	0.2632	0.4837	0.0107	0.5157	0.041
	DLA	20	4.055		0.2929
3 months post-op	PA	22	5.177	0.0973	0.5863	-0.2605	0.455	0.586
	DLA	20	5.08		0.5578
6 months post-op	PA	22	6.059	0.2691	0.4382	-0.0233	0.5615	0.07
	DLA	20	5.79		0.4994
Wilcoxon signed-rank test (abduction test)
Comparing change in strength =	Approach	N	Mean rank			U		P-Value
6 month – pre-op	PA	22	22.64			195		0.53
	DLA	20	20.25
Wilcoxon Signed-rank test (abduction test)
Approach	N	Side tested at 6-month post-up	Mean rank			U		P-Value
PA	22	Operated	15.7			391.5		0
		Normal	29.3

PA: posterior approach, DLA: direct lateral approach