• 1.

    Ihler CF, Venger JL, Skjerve E. Evaluation of clinical and laboratory variables as prognostic indicators in hospitalised gastrointestinal colic horses. Acta Vet Scand 2004; 45: 109118.

    • Search Google Scholar
    • Export Citation
  • 2.

    Hosmer DW, Lemeshow S. Applied logistic regression. 2nd ed. New York: Wiley, 2000.

  • 3.

    Kleinbaum DG, Klein M. Logistic regression: a self-learning text. 3rd ed. New York: Springer, 2010.

  • 4.

    Harrell FE. Regression modeling strategies: with applications to linear models, logistic regression, and survival analysis. New York: Springer, 2001.

    • Search Google Scholar
    • Export Citation
  • 5.

    Gordis L. Epidemiology. 4th ed. Philadelphia: Elsevier-Saunders, 2008.

  • 6.

    Lechner ES, Crawford PC, Levy JK, et al. Prevalence of protective antibody titers for canine distemper virus and canine parvovirus in dogs entering a Florida animal shelter. J Am Vet Med Assoc 2010; 236: 13171321.

    • Search Google Scholar
    • Export Citation
  • 7.

    Menzies FD, Gordon AW, McBride SH, et al. Risk factors for toxic mastitis in cows. Vet Rec 2003; 152: 319322.

  • 8.

    Bacon NJ, Ehrhart NP, Dernell WS, et al. Use of alternating administration of carboplatin and doxorubicin in dogs with microscopic metastases after amputation for appendicular osteosarcoma: 50 cases (1999–2006). J Am Vet Med Assoc 2008; 232: 15041510.

    • Search Google Scholar
    • Export Citation
  • 9.

    Hosmer DW, Lemeshow S, May S. Applied survival analysis: regression modeling of time-to-event data. 2nd ed. New York: Wiley, 2008.

  • 10.

    Kleinbaum DG, Klein M. Survival analysis: a self-learning text. 2nd ed. New York: Springer, 2005.

  • 11.

    Kiselow MA, Rassnick KM, McDonough SP, et al. Outcome of cats with low-grade lymphocytic lymphoma: 41 cases (1995–2005). J Am Vet Med Assoc 2008; 232: 405410.

    • Search Google Scholar
    • Export Citation
  • 12.

    Proudman CJ, Edwards GB, Barnes J, et al. Modelling long-term survival of horses following surgery for large intestinal disease. Equine Vet J 2005; 37: 366370.

    • Search Google Scholar
    • Export Citation
  • 13.

    Kirkby KA, Lewis DD, Lafuente MP, et al. Management of humeral and femoral fractures in dogs and cats with linear-circular hybrid external skeletal fixators. J Am Anim Hosp Assoc 2008; 44: 180197.

    • Search Google Scholar
    • Export Citation

Advertisement

Relationships between categorical dependent variables and other variables and between waiting times and other variables

View More View Less
  • 1 Statistical Communications, PO Box 671, Harvard, IL 60033.

Categorical dependent variables and censored data are frequently encountered in veterinary research. Statistical methods for analyzing these types of data will be discussed here. Some of the statistics, such as relative risks, odds ratios, and hazard ratios, may seem rather technical. The effort required to understand them is well spent, however, because they provide important information in many veterinary studies.

Relationships Between Categorical Dependent Variables and Other Variables

The relationship between a categorical dependent variable and another variable is often of interest in veterinary research. For example, a study1 was conducted to determine prognostic indicators for 46 horses

Categorical dependent variables and censored data are frequently encountered in veterinary research. Statistical methods for analyzing these types of data will be discussed here. Some of the statistics, such as relative risks, odds ratios, and hazard ratios, may seem rather technical. The effort required to understand them is well spent, however, because they provide important information in many veterinary studies.

Relationships Between Categorical Dependent Variables and Other Variables

The relationship between a categorical dependent variable and another variable is often of interest in veterinary research. For example, a study1 was conducted to determine prognostic indicators for 46 horses

Contributor Notes

Address correspondence to Dr. Shott (stattwit@aol.com).