{ "_id": "6ad311706814ce853b657d8a", "Package": "npsurvSS", "Type": "Package", "Title": "Sample Size and Power Calculation for Common Non-Parametric\nTests in Survival Analysis", "Version": "1.1.0", "Authors@R": "c(person(\"Godwin\", \"Yung\", email=\"godwin.y.yung@gmail.com\", role=c(\"aut\", \"cre\")),\nperson(\"Yi\", \"Liu\", email=\"yiliu4321@gmail.com\", role=c(\"aut\")))", "Author": "Godwin Yung [aut, cre], Yi Liu [aut]", "Maintainer": "Godwin Yung ", "Description": "A number of statistical tests have been proposed to\ncompare two survival curves, including the difference in (or\nratio of) t-year survival, difference in (or ratio of) p-th\npercentile survival, difference in (or ratio of) restricted\nmean survival time, and the weighted log-rank test. Despite the\nmultitude of options, the convention in survival studies is to\nassume proportional hazards and to use the unweighted log-rank\ntest for design and analysis. This package provides sample size\nand power calculation for all of the above statistical tests\nwith allowance for flexible accrual, censoring, and survival\n(eg. Weibull, piecewise-exponential, mixture cure). It is the\ncompanion R package to the paper by Yung and Liu (2020)\n. Specific to the weighted log-rank\ntest, users may specify which approximations they wish to use\nto estimate the large-sample mean and variance. The default\noption has been shown to provide substantial improvement over\nthe conventional sample size and power equations based on\nSchoenfeld (1981) .", "License": "GPL-2", "Encoding": "UTF-8", "RoxygenNote": "7.3.1", "VignetteBuilder": "knitr", "URL": "https://github.com/godwinyung/npsurvSS", "BugReports": "https://github.com/godwinyung/npsurvSS/issues", "Repository": "https://godwinyyung.r-universe.dev", "Date/Publication": "2024-04-13 17:22:06 UTC", "RemoteUrl": "https://github.com/godwinyyung/npsurvss", "RemoteRef": "HEAD", "RemoteSha": "f86e7e8590c85e09488a8adc5a81b71d5e8f51d0", "NeedsCompilation": "no", "Packaged": { "Date": "2026-10-17 06:07:21 UTC", "User": "root" }, "_user": "godwinyyung", "_type": "src", "_file": "npsurvSS_1.1.0.tar.gz", "_fileid": "https://r2.ropensci.org/2f26337b66f0b371fe72bdb8c4949a29d4fb52b849559e1f653e6067eab7edde", "_filesize": 851249, "_sha256": "2f26337b66f0b371fe72bdb8c4949a29d4fb52b849559e1f653e6067eab7edde", "_expires": 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"Maximum observed time", "topics": [ "dmaxU", "emaxU", "pmaxU" ] }, { "page": "dminimaxU", "title": "Minimax observed time", "topics": [ "dminimaxU", "eminimaxU", "pminimaxU", "qminimaxU" ] }, { "page": "dsurv", "title": "Survival", "topics": [ "dsurv", "hsurv", "psurv", "qsurv", "rsurv" ] }, { "page": "exp_duration", "title": "Expected duration", "topics": [ "exp_duration" ] }, { "page": "exp_events", "title": "Expected number of events", "topics": [ "exp_events" ] }, { "page": "per2haz", "title": "Convert exponential parameters", "topics": [ "per2haz" ] }, { "page": "power_two_arm", "title": "Power", "topics": [ "power_two_arm" ] }, { "page": "simulate_arm", "title": "Simulate complete data for a single arm", "topics": [ "simulate_arm" ] }, { "page": "simulate_trial", "title": "Simulate a clinical trial", "topics": [ "simulate_trial" ] }, { "page": "size_two_arm", "title": "Sample size", "topics": [ "size_two_arm" ] } ], "_rundeps": [], "_vignettes": [ { "source": 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