Table 2. Demographic Data and IPS Stem Survivorship.

Study	Level of evidence	No. of hips	No. of patients	Mean age (yr)	Mean follow-up (yr)	Survivorship (%)
Kim et al.37)	Level I	100	50	45.3	6.6	100
Kim et al.38)	Level II	601	471	52.7	8.8	99.7
Kim et al.20)	Level IV	630	500	52.7	15.8	100
Kim et al.39)	Level I	140	120	45.3	6.4	100
Kim et al.35)	Level III	60	50	46.6	6.3	100
Cinotti et al.40)	Level IV	72	64	68	9	100
Kim et al.41)	Level I	93	64	38.2	11.1	100
Kim et al.42)	Level I	200	100	45.3	5.6	100
Kim et al.43)	Level IV	73	71	45.5	8.5	100
Kim et al.24)	Level IV	110	55	46.3	15.6	100
Kim et al.44)	Level IV	127	96	24	14.6	100
Kim et al.45)	Level IV	60	50	28.3	10.8	100
Kim et al.46)	Level I	200	100	45.3	12.4	100
Kim et al.36)	Level I	100	50	51	4.8	100

IPS: Immediate Postoperative Stability.