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Abstract

Translation, adaptation, validation and perform ance of the Am er i can W ei ght E⇠ cacy Li f est yl e Quest i onnai r e Shor t For m (W E L -S F ) to a N o rw e g ia n v e rs io n : A c ro s s -s e c tio n a l s tu d yBackgr ound: Resear cher s have em phasi zed a need t o i dent i f y pr edi ct or s t hat can expl ai n t he variability in w eight m anagem ent after bariatric surgery. E ating self-e cacy has dem onstrated predi cti ve i m pact on pati ents' adherence to recom m ended eati ng habi ts fo llo w in g m u ltid is c ip lin a ry tre a tm e n t p ro g ra m s , b u t h a s to a lim ite d e x te n t b e e n s u b je c t fo r re s e a rc h a fte r b a ria tric s u rg e ry . R e c e n tly a n A m e ric a n s h o rt fo rm v e rs io n (W E L -S F ) o f th e com m only used W eight E cacy Lifestyle Q uestionnaire (W E L) w as available for research and cl i ni cal purposes. Obj ect i v es: W e i nt ended t o t r ansl at e and cul t ur al l y adapt t he W EL -SF t o Nor wegi anconditions, and to evaluate the new versions' psychom etrical properties in a N orw egian popul ati on of m orbi dl y obese pati ents el i gi bl e for bari atri c surgery.Desi gn: Cr oss-sect i onal Met hods : A t ot al of 225 out pat i ent s s el ec t ed f or Lapar os c opi c s l eev e gas t r ec t omy ( L SG) wer e re c ru ite d ; 1 1 4 n o n -o p e ra te d a n d 1 1 1 o p e ra te d p a tie n ts , re s p e c tiv e ly . T h e q u e s tio n n a ire w a s tra n s la te d th ro u g h fo rw a rd a n d b a c k w a rd p ro c e d u re s . S tru c tu ra l p ro p e rtie s w e re a s s e s s e d perform i ng pri nci pal com ponent anal ysi s (P C A ), correl ati on and regressi on anal ysi s w ere conducted to evaluate convergent validity and sensitivity, respectively. D ata w as assessed by mean, medi an, i t em r es pons e, mi s s i ng v al ues , : oor -and c ei l i ng e; ec t , Cr onbac hs al pha and al pha i f i tem del eted.Resul t s: The PCA r esul t ed i n one f act or wi t h ei genval ue>1, expl ai ni ng 63. 0% of t he var i abi l i t y.The W EL-SF sum scores were posi t i vel y correl at ed w i t h t he Sel f -e cacy and qual i t y of l i f e in s tr u m e n ts ( p < 0 .0 0 ) . T h e W E L -S F w a s a s s o c ia te d w ith b o d y m a s s in d e x ( B M I) ( p < 0 .0 0 )P e e r J P r e P r i n t s | h t t p : / / d x . d o i . o r g / 1 0 . 7 2 8 7 / p e e r j . p r e p r i n t s . 4 6 8 v 1 | CC-B Y 4 . 0 Op e n A c c e s s | r e c e i v e d : 1 9 A u g 2 0 1 4 , p u b l i s h e d : 1 9 A u g PrePrints and changes i n B M I (p=0.026). A very hi gh i tem response w as obtai ned w i th onl y one mi s s i ng v al ue ( 0. 4%) . The c ei l i ng e; ec t was i n a v er age 0. 9 and 17. 1% i n t he non-oper at ed and operated sam pl e, respecti vel y. S trong i nternal consi stency (r =0.92) w as obtai ned, and Cr onbach' s al pha r em ai ned hi gh ( 0. 86-0. 92) i f si ngl e i t em s wer e del et ed.Concl usi on: The Nor wegi an ver si on of W EL-SF appear s t o be a val i d quest i onnai r e on eat i ng self-e cacy, w ith acceptable psychom ...