Item | Class | Serum IgG, n | Serum IgG, g/L (SEM) | FPT, % (n) | Colostrum IgG, g/L (SEM) | |
---|---|---|---|---|---|---|
Factors related to method of ensuring colostrum intake evaluated in the serum IgG and FPT models | Method of ensuring colostrum intake (Routine or non-routine) | Visual assessment | 61 | 17.9 (1.45) | 31% (19) | 33.9 (3.33) |
Bottle | 82 | 15.2 (0.93) | 31% (25) | 45.1 (3.37) | ||
Assistance | 13 | 12.9 (3.44) | 54% (7) | 27.9 (4.51) | ||
Routine method of ensuring colostrum intake? | Yes (routinely managed) | 108 | 15.8 (1.01) | 32% (35) | 38.3 (2.60) | |
No (non-routinely managed) | 46 | 16.2 (1.75) | 33% (15) | 53.7 (6.04) | ||
Changed method of ensuring colostrum intake from routine? | Routine bottle | 54 | 13.8 (1.04) | 32% (17) | 41.2 (3.79) | |
Routine visual assessment | 54 | 17.9 (1.56) | 33% (18) | 35.1 (3.5) | ||
Routine bottle → non-routine visual assessment | 7 | 17.8 (4.20) | 29% (2) | 25.8 (8.31) | ||
Routine visual assessment → non-routine bottle | 28 | 17.8 (1.75) | 25% (7) | 52.7 (6.04) | ||
Routine visual assessment → non-routine assisted | 13 | 12.9 (3.44) | 54% (7) | 27.9 (4.51) | ||
Additional predictors evaluated in the colostrum IgG model | Country | Norway | 121 | 16.1 (0.89) | 31% (38) | 43.8 (2.79) |
Sweden | 35 | 15.8 (1.85) | 37% (13) | 24.8 (2.37) | ||
Season | Winter | 62 | 15.3 (1.35) | 40% (25) | 29.6 (1.93) | |
Spring | 52 | 15.7 (1.35) | 31% (16) | 50.7 (4.6) | ||
Summer | 23 | 17.0 (2.21) | 26% (6) | 41.1 (4.01) | ||
Fall | 19 | 18.1 (2.18) | 21% (4) | 36.2 (8.84) | ||
Breed | Norwegian Red | 121 | 16.1 (0.89) | 31% (38) | 43.8 (2.79) | |
SRB/SLB | 35 | 15.8 (1.85) | 30% (3) | 24.8 (2.27) | ||
Calving difficulty | Unassisted calving | 141 | 15.6 (0.82) | 35% (49) | 39.3 (2.56) | |
Easy pull | 5 | 20.4 (8.71) | 40% (2) | 40.5 (4.77) | ||
Twins | 10 | 20.3 (2.10) | 0% (0) | 40.2 (3.47) | ||
Cow parity | 1 | 39 | 15.5 (1.31) | 31% (12) | 43.6 (4.67) | |
2 | 40 | 16.5 (1.74) | 40% (16) | 30.4 (3.13) | ||
3 | 36 | 16.2 (1.89) | 31% (11) | 38.3 (3.1) | ||
> 3 | 41 | 16.0 (1.62) | 29% (12) | 44.4 (5.6) | ||
Herd size (years cows) | 15–30 | 62 | 17.7 (1.50) | 27% (17) | 47.2 (4.47) | |
31–55 | 48 | 17.3 (1.53) | 29% (14) | 34.0 (3.64) | ||
56–65 | 46 | 12.6 (1.02) | 44% (20) | 35.8 (2.54) | ||
Additional predictors evaluated in the FPT and Serum IgG models | Calf age at blood sampling (h) | 24–31 | 52 | 14.2 (1.32) | 37% (19) | 37.6 (3.3) |
32–37 | 50 | 15.5 (1.30) | 38% (19) | 41.0 (4.95) | ||
38–55 | 49 | 18.6 (1.54) | 22% (11) | 37.4 (3.00) | ||
Missing entries | – | 5 | – | – | – | |
Calf girth measurement (cm) | 60–77 | 43 | 15.2 (1.45) | 33% (14) | 38.8 (4.04) | |
78–81 | 40 | 17.6 (1.57) | 25% (10) | 47.5 (5.03) | ||
82–89 | 38 | 16.5 (1.85) | 36% (14) | 35.7 (3.9) | ||
Missing entries | – | 35 | – | – | – | |
Calf age at colostrum feeding (h) | 1–2 | 48 | 16.0 (1.34) | 31% (15) | 40.0 (3.12) | |
3–4 | 43 | 15.9 (1.67) | 35% (15) | 42.2 (4.6) | ||
5–15 | 35 | 16.1 (1.65) | 34% (12) | 28.0 (3.04) | ||
Missing entries | – | 30 | – | – | – | |
Colostrum quantity, (L, bottle only) | Low (≤ 2.0) | 75 | 15.0 (0.98) | 32% (24) | 43.5 (3.39) | |
High (> 2.0) | 4 | 20.0 (2.56) | 0% (0) | 64.5 (15.20) | ||
Missing entries | – | 3 | – | – | – |