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Article History

Received: 11 December 2017

Accepted: 20 May 2019

First Online: 30 May 2019

Ethics approval and consent to participate

: The data acquisition was approved by the regional ethical review board (Regionala etikprövningsnämnden, EPN) in Gothenburg, Medical Department, April 7, 2014 (dnr 271–14). The approval was obtained for a study plan involving several articles analysing regional, gender, age and other socioeconomical disparities after hip surgery.All patients answering the pre- and postoperative questionnaire was informed that their answers would be used in research in order to improve the quality of THA care in Sweden. Patients were also informed that their answers would be handle with confidentiality. All participants have received written information about the Swedish Hip Arthroplasty Register (SHAR) and Swedish Quality Registers and given the choice not to participate in the registry or associated research. Written informed consent for participation has not been obtained. This is in consistency with the Swedish Patient Data Act (2008:355).In accordance to the Swedish Patient Data Act (2008:355) patients receive full information and have full right to opt-out (visit SHPR Registercentrum webpage and follow Start > För patienter > Integritetsskydd för patienter).

: Not applicable.

: The authors declare that they have no competing interests.