Lateralising reverse shoulder arthroplasty using bony increased offset (BIO-RSA) or increasing glenoid component diameter: comparison of clinical, radiographic and patient reported outcomes in a matched cohort

Journal of Orthopaedics and Traumatology

Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 3 Treatment characteristics

	BIO-RSA 38 (n = 36)	RSA 42 (n= 34)	p-value	Adjusted p-value
Acromioplasty, n (%)	25 (69)	32 (94)	^A0.00798	0.0399
Humerus size, median (IQR)	10 (10–11)	10 (10–11)	^D0.707	0.707
Cemented humerus, n (%)	0 (0)	3 (9)	^C0.109	0.327
Retroversion, median ° (IQR)	30 (30–30)	30 (30–30)	^D0.588	0.707
Locking screws, n (%)			^A0.069	0.276
2/4	0 (0)	17 (50)
0/4	36 (100)	17 (50)
Graft donor, n (%)
Humeral head	34 (94)
Iliac crest	1 (3)
Allograft	1 (3)

BIO-RSA bony increased offset reverse shoulder arthroplasty, IQR interquartile range, RSA reverse shoulder arthroplasty
^Achi-square
^Bt-test
^CFisher exact test
^DMann–Whitney U test