1. Agresti, A.: Categorical Data Analysis, 3rd edn. Wiley, Hoboken, New Jersey (2013)
2. Ananth, C.V., Kleinbaum, D.G.: Regression models for ordinal responses: a review of methods and applications. Int. J. Epidemiol. 26(6), 1323–1333 (1997)
3. Anderson, J.A.: Regression and ordered categorical variables. J. R. Stat. Soc. Ser. B Methodol. 46(1), 1–30 (1984)
4. Barnes, D.E., Mehta, K.M., Boscardin, W.J., et al.: Prediction of recovery, dependence or death in elders who become disabled during hospitalization. J. Gen. Intern. Med. 28(2), 261–268 (2013)
5. Beddoes-Ley, L., Khaw, D., Duke, M., Botti, M.A.: Profile of four patterns of vulneralibility to functional decline in older general medicine patients in victoria, australia: a cross sectional survey. BMC Geriatr. 16(150), 1–12 (2016)