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The Effect of Study...
The Effect of Study Design and Analysis Methods on Recovery Rates in Bell's Palsy
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Berg, Thomas (författare)
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- Marsk, Elin (författare)
- Karolinska Institutet
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- Engström, Mats (författare)
- Uppsala universitet,Öron-, näs- och halssjukdomar
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- Hultcrantz, Malou (författare)
- Karolinska Institutet
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- Hadziosmanovic, Nermin (författare)
- Uppsala universitet,Uppsala kliniska forskningscentrum (UCR)
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- Jonsson, Lars (författare)
- Uppsala universitet,Öron-, näs- och halssjukdomar
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(creator_code:org_t)
- 2009-08-03
- 2009
- Engelska.
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Ingår i: The Laryngoscope. - : Wiley. - 0023-852X .- 1531-4995. ; 119:10, s. 2046-2050
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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http://kipublication...
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Abstract
Ämnesord
Stäng
- Objectives/Hypothesis: We investigated how study design affects the rate of recovery in Bell's palsy. Study Design: Prospective, randomized, double-blind, placebo-controlled, multicenter trial. Methods: Data were extracted from the Scandinavian Bell's palsy study, which included 829 patients. The study design was factorial; 416 patients given prednisolone, 413 not given prednisolone, 413 patients given valacyclovir, 416 not given valacyclovir. Data were analyzed with intention-to-treat principle and complete-case analysis methods and recovery was defined as Sunnybrook score 100, House-Brackmann grade I or <= grade II at 12 months. Results: With the intention-to-treat principle and last-observation-carried-forward method (n = 829) and recovery defined as Sunnybrook 100, 300 of the 416 patients (72%) receiving prednisolone had recovered compared with 237 of the 413 (57%) who did not receive prednisolone (P < .0001). With recovery defined as House-Brackmann grade 1, the corresponding recovery rates were 324 of 416 (78%) and 266 of 413 (64%) (P < .0001). With complete-case analysis and recovery defined House-Brackmann grade I (n = 782), 335 of 389 patients (86%) given prednisolone recovered compared with 277 of 393 (70%) in the group not given prednisolone (P < .0001). With recovery defined as House-Brackmann <= grade II (n = 797), the corresponding recovery rates were 380 of 396 (96%) and 353 of 401 (88%) (P < .0001). The analysis method affected the recovery rates in the valacyclovir and no-valacyclovir groups in a similar way as in the prednisolone and no-prednisolone groups. Conclusions: Recovery rates in a Bell's palsy study are substantially affected by the choice of analysis method and definition of recovery.
Nyckelord
- Facial palsy
- prednisolone
- valacyclovir
- last observation carried forward
- complete-case analysis
- Sunnybrook
- House-Brackmann
- MEDICINE
- MEDICIN
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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