Gossec et al identified factors that can help to identify a patient with primary osteoarthritis who is likely to undergo a total hip replacement. The authors are from Hopital Cochin in Paris, France.
Patient selection:
(1) ambulatory outpatient >= 40 years with osteoarthritis
(2) history of hip pain for > 6 months
(3) pain intensity >= 30 on a 100 mm VAS for pain
(4) pain for >= 14 days during the past month
Predictors for a total hip replacement:
(1) Kellgren-Lawrence radiographic grade III or IV (see 20.04.11, above)
(2) mean patient mean global assessment for disease severity > 47 (out of 100) during the first 6 months
(3) previous NSAID intake
If all 3 factors are present then the estimated probability of having a total hip replacement was 63% (odds ratio 5.6).
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