Table 3.

Primary diagnosis of primary shoulder replacement in patients aged <55 years by type of primary.

	Hemi resurfacing		Hemi stemmed		Total stemmed		Total reverse
Primary diagnosis	N	Col%	N	Col%	N	Col%	N	Col%
Osteoarthritis	291	83.9	124	23.6	578	81.6	126	35.4
Fracture	5	1.4	246	46.9	17	2.4	46	12.9
Osteonecrosis	14	4.0	75	14.3	45	6.4	14	3.9
Rheumatoid arthritis	8	2.3	19	3.6	44	6.2	38	10.7
Tumour	.	.	46	8.8	3	0.4	48	13.5
Rotator cuff arthropathy	12	3.5	3	0.6	3	0.4	70	19.7
Instability	14	4.0	10	1.9	8	1.1	9	2.5
Other inflammatory arthritis	3	0.9	2	0.4	9	1.3	5	1.4
Other					1	0.1
Total	347	100.0	525	100.0	708	100.0	356	100.0