From: Comparison of collum femoris-preserving stems and ribbed stems in primary total hip arthroplasty
CFP
Ribbed
P
0–5 mm
40.9% (27/66)
65.3% (49/75)
0.004
5–10 mm
45.5% (30/66)
32% (24/75)
0.101
> 10 mm
13.6% (9/66)
2.7% (2/75)
0.025