Table 2 Proportion of quarter foremilk samples from two herds (A, B) and for two pre-milking teat disinfection treatments (PTD: that received pre-milking teat disinfectant and NPTD: did not receive disinfectant) with a somatic cell count (SCC), < 100 × 10³, 101–200 × 10³, 201–300 × 10^3, 301–400 × 10³, and > 401 × 10³ cells/mL, across 5 sample dates

1

n = 185

n = 325

n = 179

n = 328

0–100

0.89

0.83

0.87

0.81

101–200

0.03

0.06

0.07

0.07

201–300

0.02

0.02

0.01

0.02

301–400

0.01

0.02

0.01

0.03

401+

0.05

0.07

0.04

0.06

2

n = 160

n = 330

n = 157

n = 329

0–100

0.90

0.90

0.91

0.90

101–200

0.04

0.04

0.03

0.05

201–300

0.01

0.03

0.01

0.01

301–400

0.01

0.01

0.01

0.00

401+

0.04

0.02

0.04

0.03

3

n = 192

n = 334

n = 193

n = 334

0–100

0.85

0.92

0.88

0.91

101–200

0.03

0.02

0.03

0.03

201–300

0.02

0.01

0.03

0.01

301–400

0.02

0.01

0.01

0.01

401+

0.07

0.04

0.06

0.04

4

n = 187

n = 331

n = 186

n = 327

0–100

0.81

0.89

0.77

0.90

101–200

0.08

0.05

0.08

0.05

201–300

0.03

0.01

0.08

0.02

301–400

0.01

0.00

0.01

0.01

401+

0.07

0.05

0.06

0.03

5

n = 193

n = 308

n = 190

n = 307

0–100

0.46

0.79

0.48

0.84

101–200

0.21

0.10

0.24

0.07

201–300

0.09

0.02

0.05

0.02

301–400

0.07

0.02

0.04

0.02

401+

0.17

0.07

0.19

0.05