{"_id":"zRuzZyPQxYYQc4vJb","bibbaseid":"parsons-edmondson-gilmour-ageneralizedestimatingequationmethodforfittingautocorrelatedordinalscoredatawithanapplicationinhorticulturalresearch-2006","downloads":0,"creationDate":"2018-06-23T20:06:33.917Z","title":"A Generalized Estimating Equation Method for Fitting Autocorrelated Ordinal Score Data with an Application in Horticultural Research","author_short":["Parsons, N. R.","Edmondson, R. N.","Gilmour, S. G."],"year":2006,"bibtype":"article","biburl":"http://hbiostat.org/bib/harrelfe.bib","bibdata":{"bibtype":"article","type":"article","title":"A Generalized Estimating Equation Method for Fitting Autocorrelated Ordinal Score Data with an Application in Horticultural Research","volume":"55","abstract":"Generalized estimating equations for correlated repeated ordinal score data are developed assuming a proportional odds model and a working correlation structure based on a first-order autoregressive process. Repeated ordinal scores on the same experimental units, not necessarily with equally spaced time intervals, are assumed and a new algorithm for the joint estimation of the model regression parameters and the correlation coefficient is developed. Approximate standard errors for the estimated correlation coefficient are developed and a simulation study is used to compare the new methodology with existing methodology. The work was part of a project on post-harvest quality of pot-plants and the generalized estimating equation model is used to analyse data on poinsettia and begonia pot-plant quality deterioration over time. The relationship between the key attributes of plant quality and the quality and longevity of ornamental pot-plants during shelf and after-sales life is explored.","number":"4","journal":"Appl Stat","author":[{"propositions":[],"lastnames":["Parsons"],"firstnames":["N.","R."],"suffixes":[]},{"propositions":[],"lastnames":["Edmondson"],"firstnames":["R.","N."],"suffixes":[]},{"propositions":[],"lastnames":["Gilmour"],"firstnames":["S.","G."],"suffixes":[]}],"year":"2006","keywords":"ordinal-response,longitudinal-data,serial-data,proportional-odds-model","citeulike-article-id":"13265993","citeulike-linkout-0":"http://www.jstor.org/stable/3879106","posted-at":"2014-07-14 14:10:09","priority":"0","bibtex":"@article{par06gen,\n title = {A {{Generalized Estimating Equation Method}} for {{Fitting Autocorrelated Ordinal Score Data}} with an {{Application}} in {{Horticultural Research}}},\n volume = {55},\n abstract = {Generalized estimating equations for correlated repeated ordinal score data are developed assuming a proportional odds model and a working correlation structure based on a first-order autoregressive process. Repeated ordinal scores on the same experimental units, not necessarily with equally spaced time intervals, are assumed and a new algorithm for the joint estimation of the model regression parameters and the correlation coefficient is developed. Approximate standard errors for the estimated correlation coefficient are developed and a simulation study is used to compare the new methodology with existing methodology. The work was part of a project on post-harvest quality of pot-plants and the generalized estimating equation model is used to analyse data on poinsettia and begonia pot-plant quality deterioration over time. The relationship between the key attributes of plant quality and the quality and longevity of ornamental pot-plants during shelf and after-sales life is explored.},\n number = {4},\n journal = {Appl Stat},\n author = {Parsons, N. R. and Edmondson, R. N. and Gilmour, S. G.},\n year = {2006},\n keywords = {ordinal-response,longitudinal-data,serial-data,proportional-odds-model},\n citeulike-article-id = {13265993},\n citeulike-linkout-0 = {http://www.jstor.org/stable/3879106},\n posted-at = {2014-07-14 14:10:09},\n priority = {0}\n}\n\n","author_short":["Parsons, N. R.","Edmondson, R. N.","Gilmour, S. G."],"key":"par06gen","id":"par06gen","bibbaseid":"parsons-edmondson-gilmour-ageneralizedestimatingequationmethodforfittingautocorrelatedordinalscoredatawithanapplicationinhorticulturalresearch-2006","role":"author","urls":{},"keyword":["ordinal-response","longitudinal-data","serial-data","proportional-odds-model"],"downloads":0},"search_terms":["generalized","estimating","equation","method","fitting","autocorrelated","ordinal","score","data","application","horticultural","research","parsons","edmondson","gilmour"],"keywords":["longitudinal-data","ordinal-response","proportional-odds-model","serial-data","*import"],"authorIDs":[],"dataSources":["mEQakjn8ggpMsnGJi"]}