Table 2.

Potential risk factors for cryptosporidiosis among students in the animal science class during the second outbreak, Minnesota, September 2003

^aVariables included in the final multivariate analysis were: cleaning a calf pen; getting visible manure on one’s hands; having contact with any calf with scours; a combination variable of always using coveralls and using boots; hand washing with water only; any use of soap; and drying hands on clothing.

^bBecause risk ratios were not calculable in the multivariate analyses, adjusted odds ratios were reported to provide an estimate for risk ratios in the multivariate analyses.

^cCI, Confidence interval.

^dRepresents exact confidence interval and exact P value.