title: Effects of perioperative factors and hip geometry on hip abductor muscle strength during the first 6 months after anterolateral total hip arthroplasty.
abstract: [Purpose] The importance and effect of hip joint geometry on hip abductor muscle strength are well known. In addition, other perioperative factors are also known to affect hip abductor muscle strength. This study examined the relative importance of factors affecting hip abductor muscle strength after total hip arthroplasty. [Subjects and Methods] The subjects were 97 females with osteoarthritis scheduled for primary unilateral THA. The following variables were assessed preoperatively and 2 and 6 months after surgery: isometric hip abductor strength, radiographic analysis (Crowe class, postoperative femoral offset (FO)), Frenchay Activities Index, compliance rate with home exercise, Japanese Orthopaedic Association Hip-Disease Evaluation Questionnaire (JHEQ), and demographic data. Factors related to isometric hip abductor muscle strength 2 and 6 months after surgery were examined. [Results] Significant factors related to isometric hip abductor muscle strength at 2 and 6 months after surgery were, in extraction order: 1. isometric hip abductor muscle strength in the preoperative period; 2. BMI; and 3. the JHEQ mental score at 2 and 6 months after surgery. [Conclusion] Preoperative factors and postoperative mental status were related to postoperative isometric hip abductor strength. FO was not extracted as a significant factor related to postoperative isomeric hip abductor strength.
authors.affiliation: Department of Rehabilitation Medicine, Tokyo Medical and Dental University Graduate School, Japan; Showa University School of Nursing and Rehabilitation Sciences, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Ikeda
authors.affiliation: Department of Joint Surgery and Sports Medicine, Tokyo Medical and Dental University Graduate School, Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Jinno
authors.affiliation: Clinical Center for Sports Medicine & Sports Dentistry, Tokyo Medical and Dental University, Japan.
authors.forename: Junya
authors.initials: J
authors.lastname: Aizawa
authors.affiliation: Faculty of Symbiotic Systems Science, Fukushima University, Japan.
authors.forename: Tadashi
authors.initials: T
authors.lastname: Masuda
authors.affiliation: Shonan Kamakura Joint Reconstruction Center, Japan.
authors.forename: Kazuo
authors.initials: K
authors.lastname: Hirakawa
authors.affiliation: Shonan Kamakura Joint Reconstruction Center, Japan.
authors.forename: Kazunari
authors.initials: K
authors.lastname: Ninomiya
authors.affiliation: Shonan Kamakura Joint Reconstruction Center, Japan.
authors.forename: Kouji
authors.initials: K
authors.lastname: Suzuki
authors.affiliation: Department of Rehabilitation Medicine, Tokyo Medical and Dental University Graduate School, Japan.
authors.forename: Sadao
authors.initials: S
authors.lastname: Morita
keywords: Femoral offset; Hip muscle strength; Mental status