Urdu version of the neck disability index: a reliability and validity study

Abstract

BackgroundDespite the wide use of the neck disability index (NDI) for assessing disability in patients with neck pain, the NDI has not yet been translated and validated in Urdu. The first purpose of the present study was to translate and cross-culturally adapt the NDI into the Urdu language (NDI-U). The second purpose was to investigate the reliability, validity and responsiveness of the NDI-U in Urdu-speaking patients experiencing chronic mechanical neck pain (CMNP).MethodsTranslation and cross-cultural adaptation of the original version of the NDI were carried out using previously described procedures. Seventy-six patients with CMNP and thirty healthy participants were recruited for the study. NDI-U and visual analogue scales for pain intensity (VASpain) and disability (VASdisability) were administered to all the participants at baseline and to the patients 3 weeks after receiving physiotherapy intervention. The global rating of change scale (GROC) was also administered at this time. Test-retest reliability and internal consistency were carried out on forty-six randomly selected patients two days after they completed the NDI-U. The NDI-U was evaluated for factor analysis, content validity, construct validity (discriminative and convergent validity) and responsiveness.ResultsAn intra-class correlation coefficient (ICC2,1) revealed excellent test-retest reliability for all items (ICC2,1 = 0.86–0.98) and total scores (ICC2,1 = 0.99) of the NDI-U. The NDI-U was found internally consistent with a Cronbach’s alpha of 0.90 and a fair to good correlation between single items and the NDI-U total scores (r = 0.34 to 0.89). Factor analysis of the NDI-U produced two factors explaining 66.71% of the variance. Content validity was good, as no floor or ceiling effects were detected for the NDI-U total score. To determine discriminative validity, an independent t-test revealed a significant difference in the NDI-U total scores between the patients and healthy controls (P < 0.001). For convergent validity, Pearson’s correlation coefficient showed a strong correlation between NDI-U and VASdisability (r = 0.83, P < 0.001) and a moderate correlation between NDI-U and VASpain (r = 0.62, P < 0.001). To measure responsiveness, an independent t-test showed a significant difference in the NDI-U change scores between the stable and the improved groups (P < 0.001). Furthermore, moderate correlations were found between the NDI-U change scores and the GROC (r = 0.50, P < 0.001), VASdisability change scores (r = 0.58, P < 0.001) and VASpain change scores (r = 0.55, P < 0.001).ConclusionThe results showed that the NDI-U is a reliable, valid and responsive questionnaire to measure disability in Urdu-speaking patients with CMNP.Electronic supplementary materialThe online version of this article (doi:10.1186/s12891-017-1469-5) contains supplementary material, which is available to authorized users.

Psychometric properties of the global rating of change scales in patients with neck disorders: a systematic review with meta-analysis and meta-regression

“…We found 14 studies that examined concurrent validity measures between GROC and another PRO 22 23 25 27–30 32 34–38. Correlations of Pearson’s and Spearman’s coefficients between GROC and another PRO were ranging from very weak to very strong correlations.…”

“…Five studies23 25 34 37 38 of very good-to-excellent quality reported the Pearson correlation coefficients between neck disability change scores and the GROC scores were pooled together. We found that GROC was positively correlated with disability change scores (r=0.53, 95% CI: 0.47 to 0.59, I 2 =0%).…”

A influência do período menstrual nos índices de cefaleia, incapacidade e modulação da dor em mulheres jovens

“…Tem os pontos finais de "nenhuma dor" (extremidade esquerda da linha) e, "pior dor possível" (extremidade direita da linha). (9) Questionário Midas: Neste questionário, as pacientes queixosas respondem a cinco questões, atribuindo um ponto por cada dia em que, nos últimos três meses, suas atividades diárias foram limitadas pela dor. O resultado do questionário exprime-se numa pontuação que se relaciona da seguinte forma com as necessidades de tratamento: Escore 0-5 pontos (Incapacidade mínima); Escore 6-10 pontos (Incapacidade ligeira ou pouco frequente); Escore 11-20 pontos (Incapacidade moderada); Escore ≥ 21 pontos (Incapacidade grave).…”

Urdu version of Oswestry disability index; a reliability and validity study

“…or is between 0.70–0.95 [ 33 ]. The item-total correlation was calculated through Spearman’s correlation coefficient which shows the relationship strength between each item and total score of ODI-U minus the score of the item being investigated [ 34 ]. The strong relationship between two variables is considered when r value is greater than 0.7 [ 35 ].…”