title: Factors influencing joint-preserving operations in the treatment of the late stages of osteoarthritis of the hip.
abstract: Between November 1983 and December 1992, 136 hips (119 patients) with coxarthritis were operated on using joint-preserving techniques based on the rationale of Pauwels' osteotomy. The criterion for selection was a patient in whom the height of the joint space in the weight-bearing area of the hip was less than 1 mm. The mean age at operation was 48 years and the mean follow-up 109 months (60 to 171). Hips were categorised using Bombelli's classification of osteoarthritis, into atrophic and non-atrophic types. The endpoint was defined as that at which the height of the joint space became less than 1 mm again. The Kaplan-Meier curve showed that the rate of survival of the non-atrophic group was significantly better than that of the atrophic group. Cox's proportional hazard model indicated that the factors influencing the results of joint-preserving operations included Bombelli's classification, postoperative incongruence of the joint and the height of the joint space.
authors.affiliation: Osaka Teishin Hospital, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Ohsawa
authors.forename: Y
authors.initials: Y
authors.lastname: Inamori
authors.forename: S
authors.initials: S
authors.lastname: Matsushita
authors.forename: H
authors.initials: H
authors.lastname: Norimatsu
authors.forename: R
authors.initials: R
authors.lastname: Ueno
mesh_terms: D000328:Adult; D000368:Aged; D001284:Atrophy; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000145:classification / Q000401:mortality / Q000601:surgery*; D010027:Osteotomy / Q000379:methods*; D011183:Postoperative Complications / Q000401:mortality; D016016:Proportional Hazards Models; D016019:Survival Analysis