Rg. Marx et al., How should importance and severity ratings be combined for item reduction in the development of health status instruments?, J CLIN EPID, 52(3), 1999, pp. 193-197
Citations number
14
Categorie Soggetti
Envirnomentale Medicine & Public Health","Medical Research General Topics
Patients' ratings of the severity and importance of items are often used to
select items for health status instruments. The purpose of this study was
to compare six different methods of combining severity-importance ratings.
Two different patient groups separately rated the importance and severity o
f their complaints; (i) 76 patients with upper extremity disorders rated 70
upper extremity-related questions; and (ii) 86 patients with hip arthrosis
rated 22 questions relating to their hip problem. The rank ordering of the
items using the six different methods in the two populations were very sim
ilar (tau(bi) = 0.91 and 0.87, respectively). Furthermore, the six methods
when used to choose 30 upper-extremity items shared 25 items in common and
shared 9 (of 10) hip items in the second group. In conclusion, the results
of item reduction were not affected by the method of creating importance-se
verity ratings. J CLIN EPIDEMIOL 52;3:193-197, 1999. (C) 1999 Elsevier Scie
nce Inc.