Table 3.

Changes in radiographic measurements from baseline (early postoperative) to 15 years on the implant side

Parameter	Group 1	Group 2	Group 3	p Value
Number of hips	42	53	43
Cortical index
Below lesser trochanter	−5.05	−5.38	−3.60	0.4317
Midstem	−0.27	1.58	−1.20	0.3184
Above tip	0.12	3.42	0.26	0.0997
Femur outer diameter
Below lesser trochanter	0.95	0.60	1.84	0.0166*
Midstem	0.80	2.25	4.33	0.0001‡
Above tip	1.10	1.99	2.89	0.0055†
Cortical thickness
Below lesser trochanter	−1.43	−1.56	−0.53	0.2522
Midstem	0.37	1.50	1.35	0.2435
Above tip	0.63	2.08	1.53	0.0999

A positive number indicates an increase at 15 years, and a negative number indicates a decrease at 15 years; *p < 0.05; ^†p < 0.01; ^‡p < 0.001.