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isni

Index of Local Sensitivity to Nonignorability

v1.3 · Aug 23, 2021 · GPL-2

Description

The current version provides functions to compute, print and summarize the Index of Sensitivity to Nonignorability (ISNI) in the generalized linear model for independent data, and in the marginal multivariate Gaussian model and the mixed-effects models for continuous and binary longitudinal/clustered data. It allows for arbitrary patterns of missingness in the regression outcomes caused by dropout and/or intermittent missingness. One can compute the sensitivity index without estimating any nonignorable models or positing specific magnitude of nonignorability. Thus ISNI provides a simple quantitative assessment of how robust the standard estimates assuming missing at random is with respect to the assumption of ignorability. For a tutorial, download at <https://huixie.people.uic.edu/Research/ISNI_R_tutorial.pdf>. For more details, see Troxel Ma and Heitjan (2004) and Xie and Heitjan (2004) <doi:10.1191/1740774504cn005oa> and Ma Troxel and Heitjan (2005) <doi:10.1002/sim.2107> and Xie (2008) <doi:10.1002/sim.3117> and Xie (2012) <doi:10.1016/j.csda.2010.11.021> and Xie and Qian (2012) <doi:10.1002/jae.1157>.

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Maintainer: ‘Hui Xie <huixie@uic.edu>’

No Authors@R field in DESCRIPTION.
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  Authors@R: c(person(given = "Hui",
                      family = "Xie",
                      role = c("aut", "cre"),
                      email = "huixie@uic.edu"),
               person(given = "Weihua",
                      family = "Gao",
                      role = "aut"),
               person(given = "Baodong",
                      family = "Xing",
                      role = "aut"),
               person(given = "Daniel",
                      family = "Heitjan",
                      role = "aut"),
               person(given = "Donald",
                      family = "Hedeker",
                      role = "aut"),
               person(given = "Chengbo",
                      family = "Yuan",
                      role = "aut"))
as necessary.

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as.personList().  Please use c() on person objects instead.
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use bibentry() instead.
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CRAN incoming feasibility

Maintainer: ‘Hui Xie <huixie@uic.edu>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: c(person(given = "Hui",
                      family = "Xie",
                      role = c("aut", "cre"),
                      email = "huixie@uic.edu"),
               person(given = "Weihua",
                      family = "Gao",
                      role = "aut"),
               person(given = "Baodong",
                      family = "Xing",
                      role = "aut"),
               person(given = "Daniel",
                      family = "Heitjan",
                      role = "aut"),
               person(given = "Donald",
                      family = "Hedeker",
                      role = "aut"),
               person(given = "Chengbo",
                      family = "Yuan",
                      role = "aut"))
as necessary.

Package CITATION file contains call(s) to old-style personList() or
as.personList().  Please use c() on person objects instead.
Package CITATION file contains call(s) to old-style citEntry().  Please
use bibentry() instead.
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NOTE 12 OK · 2 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE Mar 9, 2026
NOTE r-devel-linux-x86_64-debian-clang

CRAN incoming feasibility

Maintainer: ‘Hui Xie <huixie@uic.edu>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: c(person(given = "Hui",
                      family = "Xie",
                      role = c("aut", "cre"),
                      email = "huixie@uic.edu"),
               person(given = "Weihua",
                      family = "Gao",
                      role = "aut"),
               person(given = "Baodong",
                      family = "Xing",
                      role = "aut"
NOTE r-devel-linux-x86_64-debian-gcc

CRAN incoming feasibility

Maintainer: ‘Hui Xie <huixie@uic.edu>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: c(person(given = "Hui",
                      family = "Xie",
                      role = c("aut", "cre"),
                      email = "huixie@uic.edu"),
               person(given = "Weihua",
                      family = "Gao",
                      role = "aut"),
               person(given = "Baodong",
                      family = "Xing",
                      role = "aut"

Dependency Network

Dependencies Reverse dependencies nlme mvtnorm nnet matrixcalc Formula lme4 isni

Version History

new 1.3 Mar 9, 2026