For the following article based on a RCT, please match each of the following thr
ID: 138407 • Letter: F
Question
For the following article based on a RCT, please match each of the following threats to IR with their application, in context. Please note that these may not have been threats or may have been controlled. So the listed concern represents limitations that could have happened but may not necessarily have happened. Read each limitation as 'if this had happened, which threat would it have represented? Abbott JH, Robertson MC, Chapple C, Pinto D, Wright AA, de la Barra SL, Baxter GD, Theis JC, Campbell AJ, MOA Trial team. Manual therapy, exercise therapy, or both, in addition to usual care, for osteoarthritis of the hip or knee: a randomized controlled trial. 1: clinical effectiveness. Osteoarthritis and Cartilage. 2013 Apr 30;21 (4):525-34 Participants in one or more of the groups participated in exercise sessions outside of the study Attrition - B. Construct validity of cause and effect # Osteoarthritis of the knee or hip tends to get better and worse on C. its own, independent of treatment. Regression to the mean D. Testing # WOMAC scores during follow-ups were influenced by subject familiarity with the instrument from the baseline evaluation. E. Maturation Instrumentation External validity Compensatory equalization History Compensatory demoralization Compensatory rivalry # Different instructions are given for completing the WOMAC in different administrations Because subjects may have been included during an exacerbation H with improvements resulting from an artificially low initial score 15 people in the usual care plus exercise group dropped out while none dropped out in the other groups - K. # Therapists were worried about subjects in the usual care group - and gave them extra attention Subjects in the usual care group were more determined to have a good outcome because they knew they weren't getting the full treatment - The subjects in the exercise group were frustrated because they did not get manual therapy and did not complete their home exercise programs - # The type and dose of manual therapy were insufficient - The patients were not typical/representative patients with hip or knee osteoarthritisExplanation / Answer
A-column B-column explanation participants in one or more of the group participated in exercise session outside of the study regression to the mean because that maybias the mean value because of different number of participants in study and in exercise session. osteoarthritis of the knee or hip tends to get better and worse on its own, independent of treatment. testing repeated testing required to became independent from treatment WOMACS score during follow ups were influenced by subject familiarity with the instrument form the baseline evaluation HISTORY as it related to past different instructions were given to completing the WOMAC in different administrations external validity it is an experimental validity because subjects may have been included during an excerbation with improvement resulting from an artificial low initial score maturation the participants matured or became better as time passed 15 people in the usual care plus exercise group dropped out while non dropped out in the others group attrition as attrition means people will dropped out as per their choice therapist were worried about subjects in the usual care group and gave them extra attention. instrumentation extra care is the new instrument for making change subjects in the usual care group were more determined to have a good outcome because they knew they were not getting the full treatment compensatory rivalry it means they might not get sufficient treatment but they are determined the subject in the exercise group were frustrated because they did not get manual therapy and did not complete their home exercise programs compensatory demoralisation here the participants are demoralised becase of not getting complete thetrapy and treatment the type and dose of manual therapy were insufficient construct validity of cause and effect should know the cause and effect of th insufficiency the patients were not typical / representative patients with hip or knee osteoarthritis compensatory equalisation equalisation is there