next.comb {BOIN} | R Documentation |
Determine the dose combination for the next cohort of new patients for drug-combination trials that aim to find a MTD
Description
Determine the dose combination for the next cohort of new patients for drug-combination trials that aim to find a MTD
Usage
next.comb(target, npts, ntox, dose.curr, n.earlystop=100,
p.saf=0.6*target, p.tox=1.4*target, cutoff.eli=0.95,
extrasafe=FALSE, offset=0.05)
Arguments
target |
the target DLT rate |
npts |
a |
ntox |
a |
dose.curr |
the current dose combination |
n.earlystop |
the early stopping parameter. If the number of patients
treated at the current dose reaches |
p.saf |
the highest toxicity probability that is deemed subtherapeutic
(i.e. below the MTD) such that dose escalation should be undertaken.
The default value is |
p.tox |
the lowest toxicity probability that is deemed overly toxic such
that deescalation is required. The default value is
|
cutoff.eli |
the cutoff to eliminate an overly toxic dose for safety.
We recommend the default value of ( |
extrasafe |
set |
offset |
a small positive number (between |
Details
This function is used to determine dose combination for conducting combination trials.
Given the currently observed data, next.comb()
determines dose combination for
treating the next cohort of new patients. The currently observed data include: the
number of patients treated at each dose combination (i.e., npts
),
the number of patients who experienced dose-limiting toxicities at each dose
combination (i.e., ntox
), and the level of current dose (i.e., dose.curr
).
Value
the recommended dose for treating the next cohort of patients ($next_dc
).
Author(s)
Suyu Liu and Ying Yuan
References
Liu S. and Yuan, Y. (2015). Bayesian Optimal Interval Designs for Phase I Clinical Trials, Journal of the Royal Statistical Society: Series C, 64, 507-523.
Lin R. and Yin, G. (2017). Bayesian Optimal Interval Designs for Dose Finding in Drug-combination Trials, Statistical Methods in Medical Research, 26, 2155-2167.
Yan, F., Zhang, L., Zhou, Y., Pan, H., Liu, S. and Yuan, Y. (2020).BOIN: An R Package for Designing Single-Agent and Drug-Combination Dose-Finding Trials Using Bayesian Optimal Interval Designs. Journal of Statistical Software, 94(13),1-32.<doi:10.18637/jss.v094.i13>.
See Also
Tutorial: http://odin.mdacc.tmc.edu/~yyuan/Software/BOIN/BOIN2.6_tutorial.pdf
Paper: http://odin.mdacc.tmc.edu/~yyuan/Software/BOIN/paper.pdf
Examples
## determine the dose combination for the next cohort of new patients
n <- matrix(c(3, 0, 0, 0, 0, 7, 6, 0, 0, 0, 0, 0, 0, 0, 0), ncol=5, byrow=TRUE)
y <- matrix(c(0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0), ncol=5, byrow=TRUE)
nxt.comb <- next.comb(target=0.3, npts=n, ntox=y, dose.curr=c(2, 2))
summary(nxt.comb)