USE OF SMOOTHING METHODS FOR ESTIMATING THE COEFFICIENTS OF TIME DEPENDENT RATE MODELS IN SURVIVAL ANALYSIS AND ITS APPLICATION IN PSORIASIS DISEASE

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

OSMANI F.; HAJIZADEH E.; MANSOORI P.

Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Iranian Journal of Epidemiology Year:2016 | Volume:12 | Issue:3 Page(s): 36-46

Download Full-Text

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Persian Verion

View:

542

Download:

Cites:

Information Journal Paper

Title

USE OF SMOOTHING METHODS FOR ESTIMATING THE COEFFICIENTS OF TIME DEPENDENT RATE MODELS IN SURVIVAL ANALYSIS AND ITS APPLICATION IN PSORIASIS DISEASE

Author(s)

OSMANI F. | HAJIZADEH E. | MANSOORI P. | Issue Writer Certificate

Keywords

RECURRENT EVENTQ1

B-SPLINESQ1

KERNELQ1

TIME-DEPENDENT COEFFICIENT RATES MODELQ1

PSORIASISQ3

Abstract

Background and Objectives: In studies in which each person may experience an event at different times, they are RECURRENT EVENTs.One of the most popular approaches in analyzing RECURRENT EVENT is obtaining an estimate of the means/rate of events at different times. In this context,one of the things that could help to better understand the effect of this factor on the response is determining the variability due to quantitative variables in the rate of events over time. In this study,we applied KERNEL and B-spline methods to estimate coefficients in the time dependent-coefficients rate model and showed its application in data of PSORIASIS.Methods: In this study,data of patients with PSORIASIS who had a relapse leading to hospitalization in the Dermatology Department of Imam Khomeini Hospital,between 2005 and June 2013 were used. To investigate the relapse rate during these years,time-dependent coefficients rate model was used and the variability of these effects was assessed using the Wald test. Both b-Spline and KERNEL methods were used for estimating time varying coefficients in the time-dependent rate model.Finally,the results of the methods were compared based on estimates obtained.Results: The results of this study showed that according to Wald test,the effect of the variables such as the season on the occurrence of PSORIASIS was significantly different (P-value<0.01). Also, according to the estimated coefficients from both methods,there was a little difference between them.Conclusion: When the effect of a variable on the occurrence of the events is different at different time, then time-dependent coefficients rate model may provide a better estimate of the effect of variable on response.

Cites

No record.

References

No record.

Cite

APA: Copy

OSMANI, F., HAJIZADEH, E., & MANSOORI, P.. (2016). USE OF SMOOTHING METHODS FOR ESTIMATING THE COEFFICIENTS OF TIME DEPENDENT RATE MODELS IN SURVIVAL ANALYSIS AND ITS APPLICATION IN PSORIASIS DISEASE. IRANIAN JOURNAL OF EPIDEMIOLOGY, 12(3), 36-46. SID. https://sid.ir/paper/120608/en

Vancouver: Copy

OSMANI F., HAJIZADEH E., MANSOORI P.. USE OF SMOOTHING METHODS FOR ESTIMATING THE COEFFICIENTS OF TIME DEPENDENT RATE MODELS IN SURVIVAL ANALYSIS AND ITS APPLICATION IN PSORIASIS DISEASE. IRANIAN JOURNAL OF EPIDEMIOLOGY[Internet]. 2016;12(3):36-46. Available from: https://sid.ir/paper/120608/en

IEEE: Copy

F. OSMANI, E. HAJIZADEH, and P. MANSOORI, “USE OF SMOOTHING METHODS FOR ESTIMATING THE COEFFICIENTS OF TIME DEPENDENT RATE MODELS IN SURVIVAL ANALYSIS AND ITS APPLICATION IN PSORIASIS DISEASE,” IRANIAN JOURNAL OF EPIDEMIOLOGY, vol. 12, no. 3, pp. 36–46, 2016, [Online]. Available: https://sid.ir/paper/120608/en

Related Journal Papers