Table 1.

Preoperative data from the reviewed patients (N = 44)

Patients	Characteristics	Raw numbers	Percent	Mean	Standard devation	Maximum	Minimum
Sex	Male	16	36.4
	Female	28	63.6
Age				63	10.2	80	28
Country of origin	Italy	24	54.5
	Belgium/France	11	25
	Switzerland	9	20.5
Indication for prosthesis implant	Osteoarthritis	15	34.1
	Post-traumatic	23	52.3
	Rheumatoid	2	4.5
	Other (infection, tumour)	4	9.1
Operations before prosthesis				0.7	1.2	6	0
Type of prosthesis	Hemiarthroplasty	30	68.2
	Total standard	5	11.4
	Total inverse	8	18.2
	Tumour prosthesis	1	2.3
Type of infection	Early (< 2 months)	9	20.5
	Delayed (< 1 year)	21	47.7
	Late (> 1 year)	14	31.8