Only outcomes of the IWQoL , SF-36 and OWQoL show QoL outcomes that exceed community norms .
The QoL is increased after bariatric surgery on both the short and long term .
However , due to the heterogeneity of the studies and the generality of the question naires is it hard to make a distinction between different surgeries and difficult to see a relation with medical profit .
Currently the effects of bariatric surgery are generally expressed in excess weight loss or comorbidity reduction .
Therefore the aim of this review was to provide insight in the available prospect i ve evidence regarding the short and long-term effects of bariatric surgery on Quality of Life ( QoL ) and a comparison with community norms .
Validation of the Adapted Bariatric Quality of Life Index (BQL) in a Prospective Study in 446 Bariatric Patients as One-Factor Model
Background : The Bariatric Quality of Life Index ( BQL ) was created and vali date d as a nine-factor model in 2005 for the measurement of quality of life (QoL)in  patients before and after bariatric surgery .  Even though the results were acceptable , the statistical structure of the test was very unclear . Methods : A total·f466 patients were enrolled in an ongoing prospect i ve longitudinal German study . The assessment took place preoperatively and at 1 , 3 , 6 , 9 , and 12 months postoperatively . After that period , reevaluations were done on a yearly basis . In addition to demographic and clinical data , QoL data were collected using the  BQL  , the Short Form12 ( SF-12v2 ) , the Gastrointestinal Quality of Life Index ( GIQLI ) , and the  Bariatric Analysis and Reporting Outcome System  ( BAROS ; old version since the study started in 2001 ) . Statistical parameters for contingency ( Cronbach ’s Α),construct and criterion validity ( Pearson ’s r ) , and responsiveness ( st and ardized effect sizes ) were calculated . The data of the assessment s conducted preoperatively and after 6 and 12 months were used for the validation . Results : The factor analysis and the screeplot showed that a one-factor solution explained 45.37%of variance . The selectivity of the items ranged between 0.61 and 0.85 , and Cronbach ’s Α was 0.898 . The measurements showed similar excellent results with the analysis of all measurement points . Pearson ’s test showed a good retest reliability ( r = 0.9 ) . The correlations with the SF-12 and the Moorehead-Ardelt I question naire ( MA-I ) were significant , while the correlation with the GIQLI was low . The results of the correlation with the excess weight loss (EWL)(0.45 and 0.49 ) and the BMI ( –0.38 and –0.47 ) were good . Conclusion : The BQL is a valid instrument and should be preferred over generic question naires as it provides betterresponsiveness
Only outcomes of the IWQoL , SF-36 and OWQoL show QoL outcomes that exceed community norms .
The QoL is increased after bariatric surgery on both the short and long term .
However , due to the heterogeneity of the studies and the generality of the question naires is it hard to make a distinction between different surgeries and difficult to see a relation with medical profit .
Currently the effects of bariatric surgery are generally expressed in excess weight loss or comorbidity reduction .
Therefore the aim of this review was to provide insight in the available prospect i ve evidence regarding the short and long-term effects of bariatric surgery on Quality of Life ( QoL ) and a comparison with community norms .