Feb 10, 2020 18:52
4 yrs ago
18 viewers *
English term
BY statement
English to Russian
Science
Mathematics & Statistics
Клинические исследования
Клиническое исследование. Выполняется статистическая обработка данных.
Вот оригинал:
For each subgroup level of a factor, the HRs and associated CIs will be calculated from a Cox proportional hazards model (ties = Efron) that only contains a term for treatment. The Cox models will be fitted using SAS® PROC PHREG with the Efron method to control for ties and using a BY statement for the subgroup factor.
Вопрос:
Как понять здесь BY statement?
Благодарю заранее :)
Вот оригинал:
For each subgroup level of a factor, the HRs and associated CIs will be calculated from a Cox proportional hazards model (ties = Efron) that only contains a term for treatment. The Cox models will be fitted using SAS® PROC PHREG with the Efron method to control for ties and using a BY statement for the subgroup factor.
Вопрос:
Как понять здесь BY statement?
Благодарю заранее :)
Proposed translations
(Russian)
| 3 | оператор BY |
mk_lab
|
Change log
Feb 11, 2020 19:51: mk_lab changed "Field" from "Medical" to "Science"
Proposed translations
21 mins
Selected
оператор BY
Речь идет о логическом операторе BY в языке программирования, на котором написана программа обработки результатов исследования
http://www.math.wpi.edu/saspdf/stat/chap49.pdf
The PHREG procedure includes four methods of handling ties. The discrete logistic model is available for discrete time-scale data. The other three methods apply to continuous time-scale data. The exact method computes the exact conditional probability under the model that the set of observed tied event times occurs before all the censored times with the same value or before larger values. Breslow and Efron methods provide approximations to the exact method.
...
BY Statement
BY variables;
You can specify a BY statement with PROC PHREG to obtain separate analyses on observations in groups defined by the BY variables. When a BY statement appears, the procedure expects the input data set to be sorted in order of the BY variables. The variables are one or more variables in the input data set.
http://www.math.wpi.edu/saspdf/stat/chap49.pdf
The PHREG procedure includes four methods of handling ties. The discrete logistic model is available for discrete time-scale data. The other three methods apply to continuous time-scale data. The exact method computes the exact conditional probability under the model that the set of observed tied event times occurs before all the censored times with the same value or before larger values. Breslow and Efron methods provide approximations to the exact method.
...
BY Statement
BY variables;
You can specify a BY statement with PROC PHREG to obtain separate analyses on observations in groups defined by the BY variables. When a BY statement appears, the procedure expects the input data set to be sorted in order of the BY variables. The variables are one or more variables in the input data set.
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Comment: "Благодарю вас :)"
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