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Table 2 Relative frequency distributions (%) of weaning-to-first-mating interval (WMI) in parity 1 sows (144,052 records) and parity 2 or higher sows (547,224 records) categorized in six WMI groupsa

From: Recurrence patterns and lifetime performance of parity 1 sows in breeding herds with different weaning-to-first-mating intervals

WMI groups (days)

Parity 1

Parity 2 or higher

Chi-square test

n

%

n

%

0–3

5909

4.1

46,431

8.5

P <  0.05

4

43,178

30.0

243,114

44.4

 

5

55,378

38.4

179,095

32.7

 

6

11,377

7.9

24,506

4.5

 

7–20

18,219

12.7

39,944

7.3

 

21 or more

9991

6.9

14,134

2.6

 
  1. aFrequency within a column totals 100%
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Porcine Health Management

ISSN: 2055-5660

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