TY - JOUR
T1 - A New Model for Category-scaling Data with an Application to the Development of Health-status Measures
AU - Damiano, Anne M.
AU - Mackenzie, Ellen J.
AU - Epstein, Leonardo D.
PY - 1995/6
Y1 - 1995/6
N2 - Category rating is used to assess patient, family-member, provider, and societal preferences for health outcomes. Often, it is of interest to compare ratings obtained from different groups. Standard methods for making comparisons, such as regressions, correlations, and multiple t-tests, do not account for the dependency among ratings. The authors propose a new model for category ratings that does consider their relative dependency. This model provides a profile of ratings for a single group and facilitates comparisons across groups. It was applied to category ratings for four levels of Bending and Lifting function as defined by the recently developed Functional Capacity Index (FCI). Differences in ratings were observed across groups with different personal experiences of functional limitations and across groups with different degrees of clinical knowledge. These differences were not observed when standard methods were used. Thus, ignoring the relative nature of category ratings can lead to different conclusions about group preferences for health outcomes. When the ratings are being used to scale a health-status measure, this discrepancy has implications for the application of the measure in resource allocation. Key words: category scaling; health status measures. (Med Decis Making 1995;15:170-179).
AB - Category rating is used to assess patient, family-member, provider, and societal preferences for health outcomes. Often, it is of interest to compare ratings obtained from different groups. Standard methods for making comparisons, such as regressions, correlations, and multiple t-tests, do not account for the dependency among ratings. The authors propose a new model for category ratings that does consider their relative dependency. This model provides a profile of ratings for a single group and facilitates comparisons across groups. It was applied to category ratings for four levels of Bending and Lifting function as defined by the recently developed Functional Capacity Index (FCI). Differences in ratings were observed across groups with different personal experiences of functional limitations and across groups with different degrees of clinical knowledge. These differences were not observed when standard methods were used. Thus, ignoring the relative nature of category ratings can lead to different conclusions about group preferences for health outcomes. When the ratings are being used to scale a health-status measure, this discrepancy has implications for the application of the measure in resource allocation. Key words: category scaling; health status measures. (Med Decis Making 1995;15:170-179).
KW - Activities of Daily Living
KW - Analysis of Variance
KW - Choice Behavior
KW - Health Services Research
KW - Health Status Indicators
KW - Human
KW - Likelihood Functions
KW - Models, Statistical
KW - Occupations
KW - Socioeconomic Factors
KW - Support, Non-U.S. Gov't
KW - Support, U.S. Gov't, P.H.S.
KW - Treatment outcome
UR - http://www.scopus.com/inward/record.url?scp=0028904068&partnerID=8YFLogxK
U2 - 10.1177/0272989X9501500210
DO - 10.1177/0272989X9501500210
M3 - Article
C2 - 7783578
AN - SCOPUS:0028904068
VL - 15
SP - 170
EP - 179
JO - Medical Decision Making
JF - Medical Decision Making
SN - 0272-989X
IS - 2
ER -