A demonstration of interval-censored survival analysis
| Autor: | Brian R. Radke |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Canada
media_common.quotation_subject Cattle Diseases urologic and male genital diseases Food Animals immune system diseases health services administration Linear regression Covariate Statistics Animal mortality Econometrics Animals Survival analysis Mathematics media_common Salmonella Infections Animal Variables Statistical model Survival Analysis Dairying Standard error Censoring (clinical trials) Data Interpretation Statistical Animal Science and Zoology Cattle Female |
| Zdroj: | Preventive veterinary medicine. 59(4) |
| ISSN: | 0167-5877 |
| Popis: | Interval-censoring occurs in survival analysis when the time until an event of interest is not known precisely (and instead, only is known to fall into a particular interval). Such censoring commonly is produced when periodic assessments (usually clinical or laboratory examinations) are used to assess if the event has occurred. My objectives were to raise awareness about interval-censoring including its existence, the potential ramifications of ignoring its existence, the different types of interval-censored data, and the analytical methods to analyze such data (including availability in standard statistical software). Asynchronous interval-censored survival analysis was demonstrated by parametric evaluation of risk factors for the time to first detected shedding of Salmonella muenster (identified by repeated periodic fecal cultures) for a herd of dairy cows. These results were compared with those from survival analyses which ignored or approximated the interval-censoring. Ignoring or approximating the asynchronous interval-censoring in the survival analysis generally resulted in the risk factors' regression coefficients having the same signs and a decrease (often >50%) in their absolute size. All the standard errors from the three methods of approximating the interval-censoring were |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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