Table 7 Risk factors for intervertebral disc disease (IVDD) from final multivariable binary logistic regression model (OR = odds ratio, CI = confidence interval)

Breed

SWH

18 (7.1 %)

234 (92.9 %)

1 (base)

<0.001

MLH

46 (13.3 %)

300 (86.7 %)

1.77

0.96–3.25

0.07

MSH

127 (17.1 %)

617 (82.9 %)

4.60

2.62–8.08

<0.001

MWH

54 (17.7 %)

251 (82.3 %)

3.07

1.67–5.63

<0.001

SSH

49 (24.4 %)

152 (75.6 %)

4.46

2.37–8.40

<0.001

SLH

16 (12.6 %)

111 (87.4 %)

1.52

0.71–3.22

0.28

Age

0–2 years

1 (0.2 %)

497 (99.8 %)

1 (base)

<0.001

2–4 years

18 (3.9 %)

443 (96.1 %)

20.13

2.67–151.66

0.004

4–6 years

50 (13.6 %)

318 (86.4 %)

81.80

11.21–596.83

<0.001

6–8 years

99 (33.0 %)

201 (67.0 %)

259.43

35.80–1880.22

<0.001

8–10 years

75 (41.9 %)

104 (58.1 %)

425.29

58.04–3116.37

<0.001

>10 years

67 (39.6 %)

102 (60.4 %)

391.21

53.23–2875.16

<0.001

Neuter status

Neutered

231 (20.9 %)

874 (79.1 %)

1 (base)

Entire

79 (9.1 %)

791 (90.9 %)

0.63

0.45–0.85

0.003