Table 4.

Primary diagnosis of primary shoulder replacement in patients aged 55–64 years by type of primary.

	Hemi resurfacing		Hemi stemmed		Total stemmed		Total reverse
Primary diagnosis	N	Col%	N	Col%	N	Col%	N	Col%
Osteoarthritis	384	88.7	256	26.3	2836	92.7	976	41.7
Fracture	2	0.5	593	60.9	31	1.0	390	16.7
Rotator cuff arthropathy	17	3.9	20	2.1	16	0.5	737	31.5
Rheumatoid arthritis	10	2.3	26	2.7	76	2.5	98	4.2
Osteonecrosis	15	3.5	36	3.7	57	1.9	57	2.4
Tumour	.	.	29	3.0	4	0.1	32	1.4
Instability	3	0.7	10	1.0	14	0.5	35	1.5
Other inflammatory arthritis	2	0.5	4	0.4	23	0.8	13	0.6
Other					2	0.1	2	0.1
Total	433	100.0	974	100.0	3059	100.0	2340	100.0