Conclusions The last 10 years has seen a substantial increase in the number of mapping studies and some evidence of advancement in methods with consideration of models beyond OLS and greater reporting of predictive ability of mapping functions
Background Mapping is an increasingly common method used to predict instrument-specific preference-based health-state utility values ( HSUVs ) from data obtained from another health-related quality of life ( HRQoL ) measure .
There have been several method ological developments in this area since a previous review up to 2007 .
Cutoff values of the Inflammatory Bowel Disease Questionnaire to predict a normal health related quality of life.
UNLABELLED One of the objectives in the treatment of the inflammatory bowel disease ( IBD ) is improving the patient 's quality of life . However , we do not dispose of vali date d criteria to determine the question naire 's scoring threshold that has to be reached in order to be able to assert that the patients ' quality of life has normalized . OBJECTIVE To determine the normality punctuation cutoff in the IBD specific quality of life question naire IBDQ-36 . METHOD Cross-sectional study in a r and om sample of IBD patients , who have completed the question naires IBDQ-36 and EuroQol-5D .  The IBDQ-36 normality was calculated according to its equivalence with the EuroQol-5D tariff ≥ 0.90 , which corresponds to the 95 % CI of the average obtained in a Spanish general population . RESULTS 218 patients were included . According to the EuroQol-5D tariff , 70 patients were considered to have a normal quality of life and 148 a quality of life poorer than the general population . The IBDQ-36 scoring was significantly higher in the normal quality of life group ( 222.9 ± 22.8 vs. 171.4 ± 44.8 in the bad quality of life group , p<0.001 ) . According to the linear regression between IBDQ-36 and EuroQol-5D , the cutoff point is 209 , with a sensitivity and specificity to predict normality of 0.74 and 0.71 respectively . CONCLUSIONS Scores of the IBDQ-36 equal or superior to 209 suggest quality of life comparable to that perceived by the general population . This study allowed to set a threshold of normality in the management of the inflammatory bowel diseases
Conclusions The last 10 years has seen a substantial increase in the number of mapping studies and some evidence of advancement in methods with consideration of models beyond OLS and greater reporting of predictive ability of mapping functions
Background Mapping is an increasingly common method used to predict instrument-specific preference-based health-state utility values ( HSUVs ) from data obtained from another health-related quality of life ( HRQoL ) measure .
There have been several method ological developments in this area since a previous review up to 2007 .