Table 5.
Distribution of secondary control measures characteristics in 389 Norwegian dairy free-stall herds by DD category (DD+/DD−)
| Secondary control measures | n | DD+ (n = 108) | DD− (n = 281) | OR | 95% CI of OR | P value |
|---|---|---|---|---|---|---|
| n (%)b | n (%)b | |||||
| Use of disinfectant litter in cubicles | ||||||
| No | 329 | 89 (82.4) | 240 (85.4) | Baseline | 0.464 | |
| Yes | 60 | 19 (17.6) | 41 (14.6) | 1.25 | 0.69–2.27 | |
| Missing | 0 | 0 | 0 | |||
| Use of disinfectant footbaths | ||||||
| No | 354 | 88 (82.2) | 266 (94.7) | Baseline | 0.000 | |
| Yes | 34 | 19 (17.8) | 15 (5.3) | 3.83 | 1.87–7.86 | |
| Missing | 1 | 1 | 0 | |||
| Installed claw washing system in barn | ||||||
| No | 321 | 78 (72.2) | 243 (87.7) | Baseline | 0.000 | |
| Yes | 63 | 30 (27.8) | 33 (11.9) | 2.83 | 1.62–4.94 | |
| Uncertain | 1 | 0 (0) | 1 (0.4) | 1 | ||
| Missing | 4 | 0 | 4 | |||
OR odds ratio, CI confidence interval
bMissing not included in %