Description Usage Arguments Details References
This function computes the estimate of variance of the cumulative incidence function.
1 | RawVar.CIF(formulas, CIFest, data, newdata, group, event, save, group.in.train)
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formulas |
A list of length K contains formula objects, where K is the number of failures. Each element is a formula object, with the response on the left of a ~ operator, and the predictors on the right. The response must be a survival object as returned by the |
CIFest |
The point estimator of the cumulative incidence function. |
data |
A data frame with n observations and p number of covariates. |
newdata |
A data frame or a matrix used for prediction. If not specified, the original data will be used instead. |
group |
The name of the group covariates (if any). If specified, the cumulative hazards will be estimated for each group seperately. Default is |
event |
This is an internal binary indicator to specify if any type of failure occurs at a given time. |
save |
An option to save the computed S0 and S1. It is highly recommended for large-scale dataset to improve the computational efficiency. Default is |
group.in.train |
This argument is valid only when the group argument is specified. If group is presented in both data and newdata, use |
This function computes:
\hat{ξ}(s,t;z_{0})=\frac{1}{n} ∑_{i=1}^{n}[\hat{S}(\tilde{T}_{i}; z_{0}) - (\hat{F}_{j}(t;z_{0}) -\hat{F}_{k}(\tilde{T}_{i};z_{0}) )]^2\frac{\exp(2\hat{β}_{j}^{T}z_{0})δ_{ji}I(\tilde{T}_{i} ≤ t)}{(S^{(0)}(\hat{β}_{j}, \tilde{T}_{i}))^{2}}
Cheng, S. C., Jason P. Fine, and L. J. Wei. "Prediction of cumulative incidence function under the proportional hazards model." Biometrics (1998): 219-228.
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