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  "Description": "Provides fast alternatives to standard survival analysis\nfunctions in the 'survival' package, together with tools for\ntime-to-event trial simulation and sequential analysis. The\nestimation and testing functions cover a single-time-point\nKaplan-Meier estimator (survfit_fast()), log-rank tests\nincluding weighted and stratified variants (survdiff_fast()), a\nclosed-form hazard ratio estimator based on the Pike-Halley\nEstimator method (coxph_fast()), restricted mean survival time\n(rmst_fast()), window mean survival time (wmst_fast()),\nmilestone survival comparison (milestone_fast()), median\nsurvival time (medsurv_fast()), the max-combo test\n(maxcombo_fast()), the robust modestly-weighted log-rank test\n(rmw_fast()), the weighted Kaplan-Meier (Pepe-Fleming) test\n(wkm_fast()), the average hazard with survival weight\n(ahsw_fast()), and the Kalbfleisch-Prentice average hazard\nratio (ahr_fast()). The simulation layer generates individual\npatient data (simdata_fast()), performs interim or sequential\nanalyses (analysis_fast()), and aggregates operating\ncharacteristics (simsummary_fast()). A visualization layer\nassembles design-stage scenarios (gen_scenario_fast()) and\nbuilds analysis-stage Kaplan-Meier curves (kmcurve_fast()),\neach with plot and print methods. All functions are designed\nfor repeated evaluation inside large simulation loops, such as\nadaptive sample-size re-estimation, probability-of-success\ncalculations, and regional consistency evaluation in\nmulti-regional trials. Core computations are implemented in\n'C++' via 'Rcpp' for maximum performance. Methodological\nbackground is described in Collett (2014, ISBN:9780429196294).",
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        "survdiff_fast(weight = \"fh\") vs nph::logrank.test",
        "wmst_fast vs survWMST::wmst",
        "milestone_fast vs survfit + summary",
        "medsurv_fast vs nph::nphparams",
        "maxcombo_fast vs nph::logrank.maxtest",
        "rmw_fast vs nphRCT::wlrt",
        "wkm_fast vs nphsim::wkm.Stat",
        "ahsw_fast vs survAH::ah2",
        "ahr_fast vs AHR::ahrKM",
        "Representative results",
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        "Reference data",
        "Kaplan-Meier survival",
        "Log-rank test",
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