Persian version of the LANSS and S-LANSS questionnaires: A study for cultural adaptation and validation

Abstract

The aim of this study was to culturally adapt and validate Leeds assessment of neuropathic symptoms and signs (LANSS) and self-report LANSS (S-LANSS) tools. Patients with chronic pain (n = 206) were categorized into neuropathic pain (NeP) (n = 101) or non-NeP (n = 105). After the translation process, both questionnaires and the Persian Douleur Neuropathique 4 (P-DN4) were administered to patients to assess the clinometric properties. The mean overall score of both tools was significantly higher in the NeP group (p < 0.01). Test-retest reliability analysis of the overall score of the Persian (P)-LANSS and PS-LANSS were 0.99 and 0.98, respectively. α-Cronbach value for P-LANSS and PS-LANSS were 0.64 and 0.61, respectively. Factor analysis of both questionnaires yielded two components explaining most of the observable variance. The P-LANSS was significantly correlated with PS-LANSS and P-DN4 (ρ = 0.92, p = 0.01, for both). PS-LANSS was also significantly correlated with P-DN4 (ρ = 0.79, p = 0.01). Both tools successfully diagnosed NeP patients at the cutoff point of ≥12 with 88.12% sensitivity and 76.19% specificity for P-LANSS and 83.17% sensitivity and 95.24% specificity for PS-LANSS. P-LANSS and PS-LANSS are reliable and valid tools to identify NeP component in chronic pain patients. PS-LANSS was found to be an acceptable alternative for P-LANSS.

Keywords:

• Clinometric properties;
• cultural adaptation;
• LANSS;
• pain questionnaires;
• Persian language;
• S-LANSS

Acknowledgement

The authors express their appreciation for the support received from the Clinical Research Development Center of Rofeideh Rehabilitation Hospital, Tehran, Iran. The authors received no financial support for the research, authorship and/or publication of this article.

Disclosure statement

No potential conflict of interest was reported by the author(s).