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Table 1 Descriptive statistics of total milk yield (TMY, kg), two-minute milk yield (2MIN, kg), milking unit-on time (DUR, s), and time in low milk flow rate (LMF, s), stratified by parity, stage of lactation (DIM), teat-end shape (TES), and milking session in 384 milking observations of 129 cows

From: A longitudinal prospective cohort study investigating the association of premilking stimulation and teat-end shape on milking characteristics and teat tissue condition in dairy cows

  

TMY

2MIN

DUR

LMF

Item

na

Mean

SD

Median

Range

Mean

SD

Median

Range

Mean

SD

Median

Range

Mean

SD

Median

Range

Parity

                 

1st

52

12.3

2.3

12.2

5.9–18.5

6.4

2.1

6.3

0.5–11.6

215

61

208

105–427

15

13

11

4–127

2nd

27

15.0

3.7

14.9

4.7–24.9

6.4

2.6

6.3

0.0–12.2

261

68

251

163–455

24

56

11

5–427

≥3rd

50

14.3

4.9

14.7

2.4–26.2

6.3

2.3

6.4

0.0–12.3

267

90

249

128–546

26

46

12

5–306

DIM

                 

≤ 100

51

14.4

3.8

14.2

5.9–26.2

6.4

2.4

6.3

0.0–12.3

253

83

243

105–546

16

23

12

5–225

101–200

40

14.0

3.2

13.7

6.0–23.1

6.9

2.1

7.0

1.4–12.2

237

75

219

125–455

15

14

11

4–115

> 200

38

12.2

4.4

11.8

2.4–24.4

5.7

2.1

5.7

0.0–9.6

240

76

230

128–438

33

65

12

6–427

TES

                 

Pointed

18

14.5

4.6

14.5

5.9–26.2

5.2

1.9

5.3

0.0–10.6

289

101

272

105–527

25

59

13

7–427

Flat

11

13.4

3.8

13.5

6.0–21.7

6.9

2.2

6.8

2.5–12.0

223

68

218

128–393

16

15

11

6–63

Round

100

13.5

3.8

13.2

2.4–24.9

6.5

2.3

6.7

0.0–12.3

238

72

229

125–546

20

37

11

4–306

Milking session

               

Milking #1

–

15.5

4.2

15.1

2.4–26.2

6.6

2.4

6.7

0.0–12.3

270

81

261

105–546

20

47

11

6–427

Milking #2

–

11.4

3.1

11.3

2.4–19.5

5.7

2.2

5.7

0.0–11.1

218

66

207

119–523

28

45

13

6–306

Milking #3

–

14.0

3.3

13.7

5.1–23.8

6.8

2.2

6.8

0.5–12.2

244

79

234

112–496

15

20

11

4–179

  1. aNumber of cows for each category