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Table 2 Results from univariable analysis for teat-end callosity roughness and thickness

From: Milk-flow data collected routinely in an automatic milking system: an alternative to milking-time testing in the management of teat-end condition?

Variable

ROUGHNESS

THICKNESS

Odds ratio

P

95% CI

Odds ratio

P

95% CI

Lowe

Upper

Lower

Upper

MTVAC, kPa

2.126

0.001

1.357

3.331

1.890

0.008

1.185

3.016

COMPR, kPa s

1.380

0.014

1.069

1.781

1.443

0.016

1.072

1.942

AVGFLOW, kg/min

0.040

0.001

0.006

0.265

0.049

0.005

0.006

0.406

PEAKFLOW, kg/min

0.082

0.001

0.018

0.382

0.146

0.022

0.028

0.761

MPCVAC, kPa

1.008

0.708

0.967

1.050

0.965

0.132

0.921

1.011

MPCOM, kPa

0.979

0.480

0.922

1.039

0.928

0.040

0.865

0.997

Length, cm

1.137

0.665

0.635

2.034

1.054

0.874

0.549

2.024

Apex, cm

0.241

0.099

0.045

1.305

0.843

0.853

0.138

5.136

Base, cm

0.907

0.865

0.295

2.793

1.252

0.714

0.376

4.170

Overmilking time, min

0.916

0.858

0.352

2.384

0.558

0.402

0.143

2.182

  1. MTVAC, average vacuum level in the short milk tube during the main milking period; COMPR, teat compression intensity; AVGFLOW, quarter average milk flow rate; PEAKFLOW, quarter peak milk flow rate; MPCVAC, average vacuum level in the mouthpiece chamber during the main milking period; MPCOM, average vacuum level in the mouthpiece chamber in the overmilking period. Random intercepts at cow level were included in all analyses to account for within cow dependency of the outcome variables
  2. ROUGHNESS, dichotomized outcome variable where smooth teat-end callosity rings form the comparison group and teat-ends with a roughened callosity ring is considered abnormal
  3. THICKNESS, dichotomized outcome variable where teat-ends having a thin or not visible teat-end callosity ring form the comparison group, and medium, thick or extreme are considered abnormal
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Acta Veterinaria Scandinavica

ISSN: 1751-0147