TABLE 1.

Characteristics of the patients (n = 247)

	Mean ± SD or n (%)	Range
Age at operation, years	42.8 ± 14.1	15–70
Age at follow‐up, years	54.4 ± 15.0	21–86
Sex
Female	74 (30)
Male	173 (70)
BMI, kg/m2	26.6 ± 4.3	19–47
Smoking
No	213 (86)
Yes	34 (14)
Follow‐up, yr	11.6 ± 3.5	6–17
Preoperative radiographic HKA, degrees	173.3 ± 2.0	170–178

Abbreviations: BMI, body mass index; HKA, hip knee angle; SD, standard deviation.