Table 5 Summary statistics for categorical predictors.

From: Longitudinal national-level monitoring of on-farm broiler welfare identifies consistently poorly performing farms

Category

n 2010–2014

n 2016–2018

Breed

Cobb

20,946

17,557

Hubbard

7000

5389

Hybro

1024

20

Ross

233,522

124,378

Missing

34,494

3438

Stock density

 < 33 kg/m2

61,346

18,659

 > 39 kg/m2

3460

522

33-39 kg/m2

195,143

127,811

Missing

37,037

3791

Production system

Extensive indoor

 

295

Free range

 

4739

Intensive indoor

 

138,996

Organic

 

2061

Missing

 

4691

Month

1

26,405

14,163

2

23,567

12,286

3

26,088

6372

4

25,615

11,844

5

22,094

13,034

6

19,078

12,266

7

24,993

12,242

8

27,585

13,121

9

25,776

13,520

10

25,646

14,030

11

25,761

15,214

12

24,378

12,690

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