Statistical Tests of the Equality of Survival Curves: Reconsidering the Options

Suciu, Gabriel; Lemeshow, Stanley; Moeschberger, Melvin L.

doi:10.1016/s0169-7161(03)23013-3

Cited by 18 publications

(19 citation statements)

References 25 publications

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“…And between the two, the best choice for is the Peto-Peto weight function with no time lag (W pq (t i )), as it has the least variation in p-values across all the tested weight combinations. This turns out to be the same conclusion that Gaugler et al (2007) (Figure 12) we can observe that the weight functions behave dierently than when we use the full data-set, and look very much like the similar weight functions studied in Gaugler et al (2007), Suciu et al (2003), or Klein and Moeschberger (2003), conrming that the our data subset has corrected for the bias in the PL estimator and behaves much more the typical right-censored data set. The session we will be running today has 60 rounds.…”

Section: Appendix B: Data Flippingsupporting

confidence: 77%

“…Yet Fleming et al (1980) show that this test is not appropriate when the proportional hazards assumption is not satised 19 , or when there is heavy data censoring. Because the hazard functions of our two treatments cross, and because of the heavy right-hand censoring of our data 20 , we cannot use the logrank test, leaving us with no systematic way to decide which are the best weights for our data analysis (Suciu et al (2003)). …”

Section: Hazard Rates and The Product Limit Estimatormentioning

confidence: 99%

“…In fact, Suciu et al (2003) et al (2007) to select the best weight function for our crossing survival curves (see Appendix C for details).…”

Section: Hazard Rates and The Product Limit Estimatormentioning

confidence: 99%

“…As it is clear from Figure 7, this is not the case in our data. For a lengthier discussion on the proportional hazards assumption see Suciu et al (2003).…”

mentioning

confidence: 99%

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That's how we roll: An experiment on rollover risk

Bosch-Rosa

2018

Journal of Economic Behavior & Organization

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Standard-Nutzungsbedingungen:Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden.Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen.Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, gelten abweichend von diesen Nutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte. Terms of use: Documents in AbstractThere is consensus that the recent nancial crisis revolved around a crash of the short-term credit market.Yet there is no agreement around the necessary policies to prevent another credit freeze. In this experiment we test the eects that contract length (i.e. maturity mismatch) has on the market-wide supply of short-term credit.Our main result is that, while credit markets with shorter maturities are less prone to freezes, the optimal policy should be state-dependent, favoring long contracts and lower maturity mismatch when the economy is in good shape, and allowing for short-term contracts when the economy is in a recession. We also report the possibility of credit runs on rms with strong fundamentals, something that cannot be observed in the canonical static models of nancial panics. Finally, we show that our experimental design produces rich learning dynamics, with a text-book bubble and crash pattern in the market for short-term credit.Keywords: Experiment, Financial Crisis, Continuous Time, ABCP JEL Codes: C92, C91, G01, GO2, G21 * Department of Economics, Technische Universität Berlin. Email: cirilbosch@gmail.com. I would like to thank the SIGFIRM initiative and the Deutsche Forschungsgemeinschaft (DFG) through the SFB 649 "Economic Risk" for their generous funding of this project. James Pettit for programming the software, as well as Daniel Friedman and Ryan Oprea for their help on improving this paper.

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Section: Appendix B: Data Flippingsupporting

confidence: 77%

Section: Hazard Rates and The Product Limit Estimatormentioning

confidence: 99%

“…In fact, Suciu et al (2003) et al (2007) to select the best weight function for our crossing survival curves (see Appendix C for details).…”

Section: Hazard Rates and The Product Limit Estimatormentioning

confidence: 99%

“…As it is clear from Figure 7, this is not the case in our data. For a lengthier discussion on the proportional hazards assumption see Suciu et al (2003).…”

mentioning

confidence: 99%

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That's how we roll: An experiment on rollover risk

Bosch-Rosa

2018

Journal of Economic Behavior & Organization

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“…relapse, or death). The simple Cox proportional hazards models were also use to estimate the crude hazard ratios (HR) along with their corresponding 95% confidence intervals and the Wald test for significance (Suciu et al, 2004). The multivariate section consisted in the analysis of all prognostic factors significant at 0.25 level in the univariate analysis.…”

Section: Methodsmentioning

confidence: 99%

Long-Term Survival of Women with Locally Advanced Breast Cancer with ≥10 Involved Lymph Nodes at Diagnosis

Zeichner

Cavalcante²,

Suciu³

et al. 2014

Asian Pacific Journal of Cancer Prevention

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Background: Axillary lymph node status at diagnosis remains the strongest predictor of long-term survival in breast cancer. Patients with more than ten axillary lymph nodes at diagnosis have a poor long-term survival. In this single institutional study, we set out to evaluate the prognosis of this high-risk group in the era of multimodality therapy. Materials and Methods: In this retrospective study, we looked at all breast cancer patients with greater than ten axillary lymph nodes diagnosed at Mount Sinai Medical Center (MSMC) from January 1st 1990 to December 31st 2007 (n=161). In the univariate analysis, descriptive frequencies, median survival, and 5-and 10-year survival rates were estimated for common prognostic factors. A multivariate prognostic analysis for time-to-event data, using the extended Cox regression model was carried out. Results: With a median and mean follow-up of 70 and 89.9 months, respectively, the overall median survival was estimated to be 99 months. The five-year disease-free survival (DFS) was 59.3% and the ten-year DFS was 37.9%, whereas the five-and ten-year overall survival (OS) was 66.6% and 43.9%, respectively. Multivariate analysis revealed a significant improvement in DFS among black patients compared to whites (p=0.05), improved DFS and OS among young patients (ages 21-45) compared to elderly patients (age greater than 70) (p=0.00176, p=0.0034, respectively), and improved DFS and OS among patients whose tumors were ER positive (p=0.049, p=0.0034). Conclusions: In this single institution study of patients with greater than 10 positive axillary nodes, black patients had a significantly improved DFS compared with white patients. Young age and ER tumor positivity was associated with improved outcomes. Using multivariate analysis, there were no other variables associated with statistically significant improvements in DFS or OS including date of diagnosis. Further work is needed to improve breast cancer survival in this subgroup of patients.

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Some new results on Cox–Czanner divergence and their applications in survival studies

Subhash

Sunoj

2022

Biometrical J

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In the present communication, we propose a quantile-based measure for the divergence between two survival functions. This can also be used in a dynamic way where the divergence between survival functions varies with time. Several new properties of the proposed measure are investigated with suitable examples. The behavior of the measure for various reliability models is also investigated. A real data analysis is employed to compare the relative efficacy of two treatment groups using the proposed divergence measure.

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Statistical Tests of the Equality of Survival Curves: Reconsidering the Options

Cited by 18 publications

References 25 publications

That's how we roll: An experiment on rollover risk

That's how we roll: An experiment on rollover risk

Long-Term Survival of Women with Locally Advanced Breast Cancer with ≥10 Involved Lymph Nodes at Diagnosis

Some new results on Cox–Czanner divergence and their applications in survival studies

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