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given high likelihood that several key assumptions
                                                                                                 cost ineffective; therefore, consider comparison to
                                                                                                                          will be necessary to generate reference case from
                                                                                              Many existing ICU practices may be ineffective or
                                                                                                                                        Also file (eg, on Internet) intended analysis plan
                                                                                                                     Multiway sensitivity analyses probably essential
                                                                          nature of intervention and likely effects on costs
                                                                       resource use is tracked should be tailored to
                                                                                                    best practice rather than standard practice
                                                                                                                                 But, also present  “data-rich” case
                          Second ATS Workshop on Outcomes Research
                                                                                                                             critical care trials
                                                                                                                                        •
                                                                                                                                 •
                                                                                              •
                                                                                                                     •
                                                                              Include costs of other diseases
                                                                                 (too hard to disentangle)
                                                                                              Agree
                                                                                                       Agree
                                                                                                                                 Agree
                                                                                                                                        Agree
                                                                                          Agree
                                                                                                                     Agree
                                                                                                              Agree
                                                                                                                                     Agree
                                                                                    (theoretical, pragmatic, user needs, and
                                                                                                                                     Compare to available ratios (user needs)
                                                                                                                     Sensitivity analysis essential; multiway
                                                                                              If existing practice is suspect, consider
                                                                                                 best-available, viable low cost, or “do
                                                                                                       Discount costs and effects to present
                                                                                                              Use a 3% discount rate (theoretical,
                                                                                 costs and test in sensitivity analysis
                                                                                                                       sensitivity analysis preferred (user
                                                                                                                                        Journal and technical report (user
                                                                              Include or exclude other disease
                                                                                          Existing practice (conventional)
                                                                                                                                 Reference case (user needs)
                                                                                                    nothing” (conventional)
                                                                                                          value (theoretical)
                                                                                      accounting)
                                                                                                                 pragmatic)
                                                                                                                          needs)
                                                                                          Determining standard
                                                                                                       Not usually done
                                                                                                                     Not usually done
                                                                                             often difficult
                                 ICU Specific PCEHM Recommendations   Comment  Position  (Rationale) May be instances when provider perspective is   •   Agree Societal (ethical, pragmatic)  useful Require better natural history of ICU conditions   •   Agree QALYs (pragmatic, conventional) Long-term follow-up  and modeling or longer follow-up; other outcomes   is rare may be useful depending on perspective Consider modeling reduced efficacy in sensitivity   •   Agree Best-designed, least biased source    analysis  (pragmatic) Standard approach to measuring these costs not   •   Agree Costs to include: health care services;  Only hospital costs a
                      Methodological Considerations in Cost-Effectiveness Analysis
                          Methodologic Problems  Comparing CEAs  Different  Different out-  comes  Different costs  —  Different rates  —  Not standard
                                 Individual CEA  Not defined  Data are inadequate or dif-  ficult to evaluate  Data are inadequate or dif-  ficult to evaluate  Choice distorts results  Inadequate representation   of the effect of time  Inadequate representation   of uncertainty on results  —

                      TABLE 6-1   Aspect  Perspective  Outcomes (effects)                 Comparators (stan-  dard care)  Discounting  Uncertainty  Reporting




                                                            Costs










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