RT Journal Article T1 Psychometric characteristics of the Spanish version of instruments to measure neck pain disability A1 Kovacs, Francisco M A1 Bagó, Joan A1 Royuela, Ana A1 Seco, Jesús A1 Giménez, Sergio A1 Muriel, Alfonso A1 Abraira, Víctor A1 Martín, José L A1 Peña, José L A1 Gestoso, Mario A1 Mufraggi, Nicole A1 Núñez, Montserrat A1 Corcoll, Josep A1 Ignacio, Gómez-Ochoa A1 Ramírez, Ma José A1 Calvo, Eva A1 Castillo, Ma Dolores A1 David, Martí A1 Salvador, Fuster A1 Carmen, Fernández A1 Nuria, Gimeno A1 Alejandro, Carballo A1 Álvaro, Milán A1 Dolores, Vázque A1 Monserrat, Cañellas A1 Ricardo, Blanco A1 Pilar, Brieva A1 Mª Trinidad, Rueda A1 Luís, Álvarez A1 Mª TG del, Real A1 Joaquín, Ayerbe A1 Luís, González A1 Leovigildo, Ginel A1 Mariano, Ortega A1 Miryam, Bernal A1 Gonzalo, Bolado A1 Anna, Vidal A1 Ana, Ausín A1 Domingo, Ramón A1 María A, Mir A1 Miquel, Tomás A1 Javier, Zamora K1 Adulto K1 Anciano K1 Características Culturales K1 Evaluación de la Discapacidad K1 Femenino K1 Humanos K1 Masculino K1 Mediana Edad K1 Dolor de Cuello K1 Dimensión del Dolor K1 Psicometría K1 Calidad de Vida K1 Cuestionarios K1 Reproducibilidad de Resultados K1 España K1 Traducción AB BACKGROUND. The NDI, COM and NPQ are evaluation instruments for disability due to NP. There was no Spanish version of NDI or COM for which psychometric characteristics were known. The objectives of this study were to translate and culturally adapt the Spanish version of the Neck Disability Index Questionnaire (NDI), and the Core Outcome Measure (COM), to validate its use in Spanish speaking patients with non-specific neck pain (NP), and to compare their psychometric characteristics with those of the Spanish version of the Northwick Pain Questionnaire (NPQ). METHODS. Translation/re-translation of the English versions of the NDI and the COM was done blindly and independently by a multidisciplinary team. The study was done in 9 primary care Centers and 12 specialty services from 9 regions in Spain, with 221 acute, subacute and chronic patients who visited their physician for NP: 54 in the pilot phase and 167 in the validation phase. Neck pain (VAS), referred pain (VAS), disability (NDI, COM and NPQ), catastrophizing (CSQ) and quality of life (SF-12) were measured on their first visit and 14 days later. Patients' self-assessment was used as the external criterion for pain and disability. In the pilot phase, patients' understanding of each item in the NDI and COM was assessed, and on day 1 test-retest reliability was estimated by giving a second NDI and COM in which the name of the questionnaires and the order of the items had been changed. RESULTS. Comprehensibility of NDI and COM were good. Minutes needed to fill out the questionnaires [median, (P25, P75)]: NDI. 4 (2.2, 10.0), COM: 2.1 (1.0, 4.9). Reliability: [ICC, (95%CI)]: NDI: 0.88 (0.80, 0.93). COM: 0.85 (0.75,0.91). Sensitivity to change: Effect size for patients having worsened, not changed and improved between days 1 and 15, according to the external criterion for disability: NDI: -0.24, 0.15, 0.66; NPQ: -0.14, 0.06, 0.67; COM: 0.05, 0.19, 0.92. Validity: Results of NDI, NPQ and COM were consistent with the external criterion for disability, whereas only those from NDI were consistent with the one for pain. Correlations with VAS, CSQ and SF-12 were similar for NDI and NPQ (absolute values between 0.36 and 0.50 on day 1, between 0.38 and 0.70 on day 15), and slightly lower for COM (between 0.36 and 0.48 on day 1, and between 0.33 and 0.61 on day 15). Correlation between NDI and NPQ: r = 0.84 on day 1, r = 0.91 on day 15. Correlation between COM and NPQ: r = 0.63 on day 1, r = 0.71 on day 15. CONCLUSION. Although most psychometric characteristics of NDI, NPQ and COM are similar, those from the latter one are worse and its use may lead to patients' evolution seeming more positive than it actually is. NDI seems to be the best instrument for measuring NP-related disability, since its results are the most consistent with patient's assessment of their own clinical status and evolution. It takes two more minutes to answer the NDI than to answer the COM, but it can be reliably filled out by the patient without assistance.TRIAL REGISTRATIONClinical Trials Register NCT00349544. PB BioMed Central YR 2008 FD 2008-04-09 LK http://hdl.handle.net/10668/568 UL http://hdl.handle.net/10668/568 LA en NO Kovacs FM , Bago J, Royuela A, Seco J, Gimenez S, Muriel A,et al. Psychometric characteristics of the Spanish version of instruments to measure neck pain disability.BMC Musculoskelet Disord. 2008 Apr 9;9:42. NO Comparative Study; Journal Article; Multicenter StTrial Registration:; Research Support, Non-U.S. Gov't; Clinical Trials Register NCT00349544. DS RISalud RD Apr 6, 2025