Extensions of the Penalized Spline of Propensity Prediction Method of Imputation
dc.contributor.author | Zhang, Guangyu | en_US |
dc.contributor.author | Little, Roderick J. A. | en_US |
dc.date.accessioned | 2010-04-01T14:44:46Z | |
dc.date.available | 2010-04-01T14:44:46Z | |
dc.date.issued | 2009-09 | en_US |
dc.identifier.citation | Zhang, Guangyu; Little, Roderick (2009). "Extensions of the Penalized Spline of Propensity Prediction Method of Imputation." Biometrics 65(3): 911-918. <http://hdl.handle.net/2027.42/65192> | en_US |
dc.identifier.issn | 0006-341X | en_US |
dc.identifier.issn | 1541-0420 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/65192 | |
dc.identifier.uri | http://www.ncbi.nlm.nih.gov/sites/entrez?cmd=retrieve&db=pubmed&list_uids=19053998&dopt=citation | en_US |
dc.description.abstract | Little and An (2004, Statistica Sinica 14, 949–968) proposed a penalized spline of propensity prediction (PSPP) method of imputation of missing values that yields robust model-based inference under the missing at random assumption. The propensity score for a missing variable is estimated and a regression model is fitted that includes the spline of the estimated logit propensity score as a covariate. The predicted unconditional mean of the missing variable has a double robustness (DR) property under misspecification of the imputation model. We show that a simplified version of PSPP, which does not center other regressors prior to including them in the prediction model, also has the DR property. We also propose two extensions of PSPP, namely, stratified PSPP and bivariate PSPP, that extend the DR property to inferences about conditional means. These extended PSPP methods are compared with the PSPP method and simple alternatives in a simulation study and applied to an online weight loss study conducted by Kaiser Permanente. | en_US |
dc.format.extent | 150582 bytes | |
dc.format.extent | 3110 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.publisher | Blackwell Publishing Inc | en_US |
dc.rights | ©2009 International Biometric Society | en_US |
dc.subject.other | Missing at Random | en_US |
dc.subject.other | Penalized Spline | en_US |
dc.subject.other | Propensity | en_US |
dc.title | Extensions of the Penalized Spline of Propensity Prediction Method of Imputation | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbsecondlevel | Mathematics | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Biostatistics, University of Michigan, 1420 Washington Heights, Ann Arbor, Michigan 48109, U.S.A. email: rlittle@umich.edu | en_US |
dc.identifier.pmid | 19053998 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/65192/1/j.1541-0420.2008.01155.x.pdf | |
dc.identifier.doi | 10.1111/j.1541-0420.2008.01155.x | en_US |
dc.identifier.source | Biometrics | en_US |
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dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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