The international Hip Outcome Tool-33 (iHOT-33): multicenter validation and translation to Spanish

Abstract

BackgroundThe international Hip Outcome Tool-33 (iHOT-33) is a 33-item self administered outcome measure based on a Visual Analogue Scale response format designed for young and active population with hip pathology. The aim of the present study is to translate and validate the iHOT-33 into Spanish.Methods97 patients undergoing hip arthroscopy were included in this prospective and multicenter study performed between January 2012 and May 2014. Crosscultural adaptation was used to translate iHOT-33 into Spanish. Patients completed the questionnaire before and after surgery. Feasibility, reliability, internal consistency, construct validity (correlation with Western Ontario and McMaster Universities Osteoarthritis Index), ceiling and floor effects and sensitivity to change were assessed for the present study.ResultsMean age was 48 years old. Feasibility: 41.2 % patients had no blank questions, and 71.3 % of patients had fulfilled all but one or two questions. Reliability: ICC for the global questionnaire was 0.97, showing that the questionnaire is highly reproducible. Internal consistency: Cronbach’s alpha was 0.98 for the global questionnaire. Construct validity: there was a high correlation with WOMAC (correlation coefficient >0.5). The Ceiling effect (taking into account the minimum detectable change) was 12.1 % and the floor effect was 21.6 %, for the global questionnaire. Large sensitivity to change was shown.Conclusionthe Spanish version of iHOT-33 has shown to be feasible, reliable and sensible to changes for patients undergoing hip arthroscopy. This validated translation of iHOT-33 allows for comparisons between studies involving either Spanish- or English-speaking patients.Level of evidencePrognostic study, Level I.

Development of a valid Simplified Chinese version of the International Hip Outcome Tool (SC-iHOT-33) in young patients having total hip arthroplasty

“…Young patients with hip disorders have a higher demand for the ability to return to sports, heavy physical activity, and quality of life compared to older patients 8 . Therefore, it is not suitable to evaluate the operation effect by adopting ordinary scales developed for older patients.…”

“…Therefore, people will be more willing to accept THA and patients undergoing THA in China are ideal candidates for the iHOT-33 adaption. Moreover, when Mohtadi et al 8 developed the iHOT-33, patients who underwent THA were part of the inclusion criteria.…”

“…Additionally, the sample size met the criterion from a previous study 11 , that suggested that the study should have at least 100 patients enrolled for an internal consistency analysis and 50 patients enrolled for floor or ceiling effects and reliability and validity analysis. At the same time, we reviewed a similar study 8 , and taking into account that some subjects would be lost to follow-up, we decided the sample size should be at least 120 patients.…”

“…Part 2 offers a VAS for the patients through which they score their physical health 12 . Both the WOMAC and the EQ-5D have been translated into simplified Chinese, with good validity, reliability, and responsivity 13,14 and have been used to evaluate the construct validity of the iHOT-33 in other studies 7,8 .…”

Sleep quality and nocturnal pain in patients with femoroacetabular impingement and acetabular dysplasia

“…The sample size established was a convenience sample consisting of patients presenting to the clinic with the diagnoses in question. In particular, patients completed questionnaires that included the Hip disability and Osteoarthritis Outcome Score (HOOS), Hip Outcome Score (HOS) scale, Modified Harris Hip Score (mHHS) scale, UCLA Activity scale, International Hip Outcome Tool (iHOT), Visual Analogue Pain Scale (EQ-VAS), Short Form Health Survey (SF-12), and the Pittsburgh Sleep Quality Index (PSQI) [29][30][31][32][33][34][35][36].…”