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Glossary entry

português term or phrase:

teste de log-rank estratificado com error de tipo-1 unilateral i = 0,025

inglês translation:

stratified log-rank test with one-sided type-I error rate i = 0.025

Added to glossary by Roxane Dow
Apr 19, 2017 19:11
7 yrs ago
4 viewers *
português term

teste de log-rank estratificado com error de tipo-1 unilateral i = 0,025

português para inglês Medicina Medicina: farmacêutica Statistical tests
From Methods and Data Analysis section of Ethics Committee decision (describing statistics used to analyze clinical trial data) in Brazil

Full sentence:
Pelo menos XXX eventos são necessários para garantir um poder de 90% de detecção da diferença na SG pelo teste de log-rank estratificado com erro do tipo-1 unilateral i = 0,025, e taxa de risco real subjacente de 0,65.

I know that this is "stratified log-rank test" and "type I error", but what does "unilateral" (one-sided) modify?

I think the "i" is a typo, and should probably be "p".

Thanks for any help you can offer! I would also appreciate any references to basic statistics textbooks that might help.
Proposed translations (inglês)
4 stratified log-rank test with one-sided type-I error rate i = 0.025
4 one-sided stratified log-rank test at a type I error rate of i = 0.025

Discussion

Roxane Dow (asker) Apr 25, 2017:
Various terms Mario, I see your point about the different terms in this question. I thought about posting them all separately, but then the question wouldn't have made much sense.
Roxane Dow (asker) Apr 25, 2017:
Thank you, Gilmar! Gilmar, thank you for alerting me about my other ungraded questions. ProZ was not sending me any notices, so I assumed that they had not been answered.
Roxane Dow (asker) Apr 25, 2017:
Thank you, Paulo! Paulo, thank you for your suggestion; this is the translation I used in the end. Would you like to enter it as an answer so that you can get the point?
Paulo César Mendes MD, CT Apr 20, 2017:
i is NOT a p-value. You cannot calculate a p-value without actual data, which you don't have at this point.

One-sided refers to the statistic's distribution. Every statistical test is associated with a distribution that is used to calculate significance and error. As this sentence focuses on the error rate, I would write "stratified log-rank test with one-sided type-I error rate i = 0.025"
Gilmar Fernandes Apr 19, 2017:
@ Roxane How about closing your questions here in KudoZ ?

http://www.proz.com/kudoz/portuguese_to_english/medical_phar...
Mario Freitas Apr 19, 2017:
3 or 4? How many different terms are there in this question?

Proposed translations

5 dias
Selected

stratified log-rank test with one-sided type-I error rate i = 0.025

"One-sided" refers to the statistic's distribution. Every statistical test is associated with a distribution that is used to calculate significance and error. As this sentence focuses on the error rate, I would write "stratified log-rank test with one-sided type-I error rate i = 0.025"

The "i" is NOT a p-value. You cannot calculate a p-value without actual data, which you don't have at this point.
Reference:

https://en.wikipedia.org/wiki/Log-rank_test

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4 KudoZ points awarded for this answer. Comment: "Many thanks, Paulo!"
29 minutos

one-sided stratified log-rank test at a type I error rate of i = 0.025

As used in the following document:

https://www.accessdata.fda.gov/drugsatfda_docs/nda/2010/2015...

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Note added at 32 mins (2017-04-19 19:44:18 GMT)
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I think this i can be an error as well; have you looked at the rest of the document?

Also, I believe one-sided modifies the test. At least this is the way see it written most often in the protocols I translate from English into Portuguese.

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Note added at 33 mins (2017-04-19 19:45:00 GMT)
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One-sided vs. two-sided tests:

http://onbiostatistics.blogspot.com.br/2016/03/one-sided-ver...
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