Table 3.
Odds for occurrence of mitral regurgitation murmur and moderate to severe mitral valve prolapse (MVP) in dogs examined in 2010 and 2011 compared with dogs examined in 2002 and 2003
| Response Variable | Variables Adjusted For | PB 2010–2011 Versus 2002–2003 (Group 2 Versus Group 1) | Non‐PB 2010–2011 Versus 2002–2003 (Group 3 Versus Group 1) | PB Versus Non‐PB 2010–2011 (Group 2 Versus Group 3) | |
|---|---|---|---|---|---|
| MR murmur > 0 | Agea at examination (P < .0001) | P | <.0001 | .49 | <.0001 |
| OR | 0.27 | – | 0.31 | ||
| 95% | 0.16–0.43 | – | 0.24–0.41 | ||
| MVP > 1 | Agea at examination and sexb (both P < .0001) | P | .23 | .78 | .0006 |
| OR | – | – | 0.64 | ||
| 95% | – | – | 0.49–0.82 |
Group 1 is dogs examined in 2002 and 2003. Group 2 and 3 are dogs examined in 2010 and 2011 that are products of the breeding scheme (PB) and nonproducts of the breeding scheme (non‐PB), respectively. MR, mitral regurgitation. OR, odds ratio; 95%, 95% confidence interval for the odds ratio.
a
Odds increase with advancing age.
b
Male higher odds than female.