Table 2.
Final generalized linear mixed models for 2 measures of daily waiting time to access the robot with cow-level factors in an automated milking system (AMS) with free-flow traffic design (n = 40 cows)1
| Item | Square root of waiting time (min/d) |
No. of visits to waiting area (no./d) |
||
|---|---|---|---|---|
| Estimate (95% CI) | P-value | Estimate (95% CI) | P-value | |
| Intercept | 10.74 (8.78 to 12.69) | <0.001 | 8.97 (8.47.262 to 10.67) | <0.001 |
| Parity | ||||
| 1 | Referent | Referent | ||
| 2+ | −3.39 (−6.03 to −0.75) | 0.012 | −3.57 (−5.73 to −1.40) | 0.001 |
| DIM | −0.02 (−0.03 to −0.003) | 0.013 | −0.03 (−0.04 to −0.01) | <0.001 |
| Parity × DIM | ||||
| 1 × DIM | Referent | Referent | ||
| 2+ × DIM | 0.02 (0.00 to 0.04) | 0.039 | 0.03 (0.01 to 0.04) | <0.001 |
| Fetch pen users2 | — | |||
| No | Referent | Referent | ||
| Yes | 1.29 (−0.001 to 2.59) | 0.050 | −1.27 (−2.34 to −0.20) | 0.020 |
| Frequently refused at AMS3 | — | — | ||
| No | — | — | Referent | |
| Yes | — | — | 1.99 (0.93 to 3.04) | <0.001 |
1
Waiting behavior and AMS data collected from 2 continuous 24-h periods.
2
Cows that used the fetch pen, voluntarily or forced, ≥20% of the time in 24 h.
3
Cows refused at the AMS ≥20% of the time in 24 h.