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The Neck Disability Index-Russian Language Version (NDI-RU): A Study of Validity and Reliability.
Spine (Phila Pa 1976). 2015 Jul 15; 40(14):1115-21.S

Abstract

STUDY DESIGN

Cross-cultural adaptation and psychometric testing.

OBJECTIVE

To perform a validated Russian translation and then to evaluate the validity and reliability of the Russian language version of the Neck Disability Index (NDI-RU).

SUMMARY OF BACKGROUND DATA

Neck pain is highly prevalent and can greatly affect daily activity. The Neck Disability Index (NDI) is the most frequently used scale for self-rating of disability due to neck pain. Its translated versions are applied in many countries. However, the Russian language version of the NDI has not been developed yet.

METHODS

Cross-cultural adaptation of the NDI-RU was performed according to established guidelines. Then, the NDI-RU was evaluated for content validity, concurrent criterion validity, internal consistency, test-retest reliability, factor structure, and minimum detectable change.

RESULTS

Two hundred thirty-two patients took part in the study in total: 109 in validity (39.5 ± 10 yr), 123 in reliability (38.4 ± 11 yr; 80 in the test-retest phase). A culturally valid translation was achieved. NDI-RU total scores were distributed normally. Floor/ceiling effects were absent. Good values of Cronbach α were obtained for each item (from 0.80 to 0.84) and for the total NDI-RU (0.83). A 2-factor solution was found for the NDI-RU. The average interitem correlation coefficient was 0.53. Intraclass correlation coefficients for test-retest reliability coefficients ranged from 0.65 to 0.92 for different items and 0.91 for the total NDI-RU. Moderate correlation (Spearman rs = 0.62; P < 0.05) was found between the NDI-RU total score and graphic rating scalepain score. Completion of the NDI-RU takes 3.6 ± 1 minutes.

CONCLUSION

The development of a Russian language version of the Neck Disability Index resulted in a valid, reliable instrument that can be used both in clinical practice and scientific investigations.

LEVEL OF EVIDENCE

1.

Authors+Show Affiliations

*Department of Neurology, Neurosurgery and Medical Genetics, Russian National Research Medical University (named after N. I. Pirogov), and Department of Manual Therapy, Center for Manual Therapy, Moscow, Russia †Canadian Memorial Chiropractic College, Toronto, Ontario, Canada; and ‡Department of Physiotherapy, Moscow City Hospital, Moscow, Russia.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

25768684

Citation

Bakhtadze, Maxim A., et al. "The Neck Disability Index-Russian Language Version (NDI-RU): a Study of Validity and Reliability." Spine, vol. 40, no. 14, 2015, pp. 1115-21.
Bakhtadze MA, Vernon H, Zakharova OB, et al. The Neck Disability Index-Russian Language Version (NDI-RU): A Study of Validity and Reliability. Spine (Phila Pa 1976). 2015;40(14):1115-21.
Bakhtadze, M. A., Vernon, H., Zakharova, O. B., Kuzminov, K. O., & Bolotov, D. A. (2015). The Neck Disability Index-Russian Language Version (NDI-RU): A Study of Validity and Reliability. Spine, 40(14), 1115-21. https://doi.org/10.1097/BRS.0000000000000880
Bakhtadze MA, et al. The Neck Disability Index-Russian Language Version (NDI-RU): a Study of Validity and Reliability. Spine (Phila Pa 1976). 2015 Jul 15;40(14):1115-21. PubMed PMID: 25768684.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The Neck Disability Index-Russian Language Version (NDI-RU): A Study of Validity and Reliability. AU - Bakhtadze,Maxim A, AU - Vernon,Howard, AU - Zakharova,Olga B, AU - Kuzminov,Kirill O, AU - Bolotov,Dmitry A, PY - 2015/3/14/entrez PY - 2015/3/15/pubmed PY - 2016/4/15/medline SP - 1115 EP - 21 JF - Spine JO - Spine (Phila Pa 1976) VL - 40 IS - 14 N2 - STUDY DESIGN: Cross-cultural adaptation and psychometric testing. OBJECTIVE: To perform a validated Russian translation and then to evaluate the validity and reliability of the Russian language version of the Neck Disability Index (NDI-RU). SUMMARY OF BACKGROUND DATA: Neck pain is highly prevalent and can greatly affect daily activity. The Neck Disability Index (NDI) is the most frequently used scale for self-rating of disability due to neck pain. Its translated versions are applied in many countries. However, the Russian language version of the NDI has not been developed yet. METHODS: Cross-cultural adaptation of the NDI-RU was performed according to established guidelines. Then, the NDI-RU was evaluated for content validity, concurrent criterion validity, internal consistency, test-retest reliability, factor structure, and minimum detectable change. RESULTS: Two hundred thirty-two patients took part in the study in total: 109 in validity (39.5 ± 10 yr), 123 in reliability (38.4 ± 11 yr; 80 in the test-retest phase). A culturally valid translation was achieved. NDI-RU total scores were distributed normally. Floor/ceiling effects were absent. Good values of Cronbach α were obtained for each item (from 0.80 to 0.84) and for the total NDI-RU (0.83). A 2-factor solution was found for the NDI-RU. The average interitem correlation coefficient was 0.53. Intraclass correlation coefficients for test-retest reliability coefficients ranged from 0.65 to 0.92 for different items and 0.91 for the total NDI-RU. Moderate correlation (Spearman rs = 0.62; P < 0.05) was found between the NDI-RU total score and graphic rating scalepain score. Completion of the NDI-RU takes 3.6 ± 1 minutes. CONCLUSION: The development of a Russian language version of the Neck Disability Index resulted in a valid, reliable instrument that can be used both in clinical practice and scientific investigations. LEVEL OF EVIDENCE: 1. SN - 1528-1159 UR - https://www.unboundmedicine.com/medline/citation/25768684/The_Neck_Disability_Index_Russian_Language_Version__NDI_RU_:_A_Study_of_Validity_and_Reliability_ L2 - https://doi.org/10.1097/BRS.0000000000000880 DB - PRIME DP - Unbound Medicine ER -