Table 6

Final multivariable mixed-effects logistic regression model, with cow nested in herd being random factors, of risk factors significantly associated with SCM in the Savannah region of Nigeria
Variable Level OR (adjusted) SE z Pvalue 95%CI *Chi square *DF *Pvalue
Age (years) Old 1.00 Ref Ref Ref Ref 17.40 1 < 0.001
Young 0.283 0.087 −4.11 < 0.001 0.155; 0.516
Washing hands before milking No 1.00 Ref Ref Ref Ref 9.05 1 0.003
Yes 0.173 0.103 −2.95 0.003 0.054; 0.554
Breed White Fulani 1.00 Ref Ref Ref Ref 7.83 3 0.050
Sokoto Gudali 2.601 1.222 2.03 0.042 1.036; 6.533
Holstein-Friesian 1.914 0.875 1.42 0.156 0.781; 4.688
Rahaji 8.205 6.956 2.48 0.013 1.557; 43.226
Quarter LFQ 1.00 Ref Ref Ref Ref 17.13 3 0.001
LHQ 0.462 0.103 −3.46 0.001 0.298; 0.715
RFQ 0.446 0.010 −3.61 < 0.001 0.287; 0.691
RHQ 0.614 0.135 −2.22 0.027 0.399; 0.945

* The effect of potential risk factors in the multivariable mixed-effects logistic regression model; SCM = subclinical mastitis.

Shittu et al.

Shittu et al. BMC Veterinary Research 2012 8:134   doi:10.1186/1746-6148-8-134

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