Validation of The Slovenian Version of the Low Anterior Resection Syndrome Score for Rectal Cancer Patients after Surgery

Zdr Varst. 2019 Oct 1;58(4):148-154. doi: 10.2478/sjph-2019-0019. eCollection 2019 Dec.

Abstract

Purpose: The purpose of this study was to translate the low anterior resection syndrome (LARS) score into Slovenian and to test its validity on Slovenian patients who underwent low anterior rectal resection.

Methods: The LARS score was translated from English into Slovenian and then back-translated following international recommendations. The Slovenian version of the LARS questionnaire was completed by patients who underwent low anterior rectal resection between 1 January 2006 and 31 December 2010 at the University Medical Centre Ljubljana. An anchor question assessing the impact of bowel function on lifestyle was included. To assess test-retest reliability, some of the patients answered the LARS score questionnaire twice.

Results: A total of 100 patients (66.7%) of the 150 patients who were contacted for participation, were included in the final analysis. A total of 58 patients reported major LARS score. The LARS score was able to discriminate between patients who received radiotherapy and those who did not (p<0.001), and between total and partial mesorectal excision (p<0.001). Age was not associated with a greater LARS score (p=0.975). There was a perfect fit between the QoL category question and the LARS score in 66.0% of cases and a moderate fit was found in 24.0% of the cases, showing good convergent validity. Test-retest reliability of 51 patients showed a high intraclass correlation coefficient of 0.86.

Conclusions: The Slovenian translation of the LARS score is a valid tool for measuring LARS.

Namen: Prevod in potrditev vprašalnika o sindromu nizke sprednje resekcije rektuma (vprašalnik LARS).

Metode: Študija, ki je vključevala 100 slovenskih bolnikov, je potekala februarja in marca 2018. Vprašalnik LARS je bil preveden v slovenščino iz angleščine po mednarodnih priporočilih. Sodelovali so pacienti, ki so bili zaradi raka danke na Univerzitetnem kliničnem centru v Ljubljani operirani v obdobju od 1. januarja 2006 do 31. decembra 2010 in pri katerih je bila narejena sfinkter ohranjujoča nizka sprednja resekcija rektuma. Poleg vprašalnika LARS so pacienti odgovorili tudi na dodatno vprašanje o vplivu težav s črevesjem na kvaliteto svojega življenja.

Rezultati: Vprašalnik z dodatnim vprašanjem smo poslali 150 pacientom, v raziskavo jih je bilo vključenih 100. Pri 58 bolnikih so rezultati potrdili prisotnost zelo izrazitega sindroma nizke sprednje resekcije. Vprašalnik LARS zanesljivo loči bolnike, ki so bili pred operacijo obsevani, od tistih, ki tovrstnega zdravljenja niso prejeli (p < 0,001). Prav tako zanesljivo razlikuje tudi med pacienti, pri katerih je bil narejen delni ali popolni izrez mezorektuma (p < 0,001). Starost ni povezana z rezultati vprašalnika LARS (p = 0,975). 51 naključno izbranim pacientom smo vprašalnik poslali dvakrat. Popolno skladnost med vprašanjem o kvaliteti življenja in izidom vprašalnika LARS smo ugotovili v 66,0 %, zmerno skladnost pa v 24,0 %, kar kaže dobro konvergenčno veljavnost testa. Testiranje in ponovno testiranje sta potrdili visoko zanesljivost slovenskega prevoda vprašalnika s korelacijskim koeficientom znotraj skupine, ki je znašal 0,86.

Zaključek: Slovenski prevod vprašalnika LARS smo potrdili kot notranje skladno, zanesljivo in natančno orodje za oceno funkcionalnih težav s črevesjem pri pacientih po operaciji raka danke in tudi vpliv teh na kvaliteto njihovega življenja.

Keywords: bowel function; low anterior resection; low anterior resection syndrome; quality of life; rectal cancer.