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Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 1 Patient baseline demographics

From: Unexpected early loosening of rectangular straight femoral Zweymüller stems with an alumina-reduced surface after total hip arthroplasty—a prospective, double-blind, randomized controlled trial

Variables at surgery

STD stem n = 26

NT stem n = 23

Mean age, years (SD)

70.9 (8.9)

64.2 (9.2)

Mean BMI, kg/m2 (SD)

28.3 (6.7)

27.0 (6.3)

Sex, n (%)

 Female

17 (65)

14 (61)

 Male

9 (35)

9 (39)

Side, n (%)

 Left

13 (50)

11 (48)

 Right

13 (50)

12 (52)

  1. BMI body mass index, kg kilogram, m meter, n number, NT new technology, SD: standard deviation, STD standard