Table 1.

Demography of arthroplasty designs

	All	TSA	rTSA	RHA	SHA	p-valuea
Mean age	65	65	74	63	65	0.3
Female	133	14	19	62	37	0.8
Previous surgery	16	2	2	9	3	0.8
Non-responder	37	3	4	18	12	0.2
Total	167 b	16	24	80	46

^aRHA vs. SHA by t-test and chi-squared test.

^b1 missing