Table 2.
Blood cell count least square means (confidence interval) by feed efficiency group of both developmental stages at the start and end of the test.
| Stage/Analyte (Abbreviation; Unit) | Start of Performance Evaluation | End of Performance Evaluation | ||||
|---|---|---|---|---|---|---|
| Efficient | Inefficient | p-Value | Efficient | Inefficient | p-Value | |
| Heifer calves | (n = 54) | (n = 53) | (n = 54) | (n = 53) | ||
| Fibrinogen (g/dL) | 4.26 (4.00, 4.52) | 4.19 (3.93, 4.45) | 0.70 | 3.80 (3.50, 4.09) | 3.85 (3.55, 4.15) | 0.81 |
| Hematocrit (%) | 35.9 (34.9, 37.0) | 35.9 (34.8, 37.0) | 0.94 | 35.4 (34.4, 36.4) | 36.1 (35.1, 37.1) | 0.32 |
| Hemoglobin (mg/dL) | 120 (117, 124) | 120 (117, 124) | 0.90 | 122 (122, 129) | 125 (119, 126) | 0.20 |
| Lymphocytes (WBC %) | 67.1 (64.4, 69.8) | 63.3 (60.6, 66.0) | 0.05 | 62.2 (59.4, 65.1) | 60.2 (57.3, 63.1) | 0.31 |
| Mean cell hemoglobin (MCH; pg) | 14.5 (14.4, 14.7) | 14.7 (14.6, 14.9) | 0.08 | 16.0 (15.8, 16.2) | 16.4 (16.2, 16.7) | 0.01 |
| Mean corpuscular volume (MCV; Hfl) | 43.3 (42.8, 43.8) | 43.8 (43.3, 44.4) | 0.19 | 46.2 (45.6, 46.9) | 47.0 (46.4, 47.7) | 0.09 |
| Monocytes (WBC %) | 3.61 (3.07, 4.16) | 3.53 (3.00, 4.08) | 0.83 | 4.10 (3.44, 4.75) | 3.71 (3.04, 4.39) | 0.42 |
| Platelets (103 cells/µL) | 514 (473, 555) | 486 (444, 528) | 0.34 | 417 (385, 449) | 430 (398, 463) | 0.55 |
| Red blood cells (RBC; 106 cells/µL) | 8.29 (8.05, 8.54) | 8.19 (7.94, 8.44) | 0.56 | 7.65 (7.43, 7.87) | 7.67 (7.44, 7.89) | 0.92 |
| Segmented neutrophils (WBC %) | 27.1 (24.5, 29.7) | 30.9 (28.2, 33.5) | 0.05 | 26.9 (24.5, 29.3) | 27.0 (24. 6, 29.4) | 0.96 |
| White blood cells (WBC; 103 cells/µL) | 10.3 (9.74, 10.9) | 10.3 (9.70, 10.9) | 0.94 | 10.1 (9.50, 10.8) | 9.81 (9.17, 10.5) | 0.48 |
| Pregnant heifers | (n = 16) | (n = 15) | (n = 16) | (n = 15) | ||
| Fibrinogen (g/dL) | 4.94 (4.35, 5.54) | 4.38 (3.69, 5.08) | 0.22 | 3.78 (2.99, 4.57) | 4.23 (3.30, 5.16) | 0.45 |
| Hematocrit (%) | 32.4 (30.7, 34.1) | 31.7 (29.9, 33.4) | 0.49 | 35.9 (34.3, 37.4) | 36.3 (34.7 37.9) | 0.92 |
| Hemoglobin (mg/dL) | 116 (110, 122) | 113 (108, 120) | 0.56 | 121 (115, 127) | 122 (117, 128) | 0.72 |
| Lymphocytes (WBC %) | 62.3 (57.8, 66.8) | 62.1 (57.5, 66.8) | 0.96 | 68.4 (64.5, 72.4) | 62.5 (58.5, 66.6) | 0.04 |
| Mean cell hemoglobin (MCH; pg) | 15.3 (14.8, 15.8) | 16.0 (15.4, 16.6) | 0.09 | 16.7 (16.2, 17.2) | 17.4 (16.9, 18.0) | 0.06 |
| Mean corpuscular volume (MCV; Hfl) | 41.9 (40.3, 43.7) | 43.9 (42.1, 46.0) | 0.07 | 50.0 (48.4, 51.70) | 51.9 (49.9, 53.8) | 0.23 |
| Monocytes (WBC %) | 3.67 (2.30, 5.03) | 3.23 (1.63, 4.84) | 0.68 | 4.65 (3.34, 5.96) | 4.46 (2.96, 5.96) | 0.85 |
| Platelets (103 cells/µL) | 396 (332, 461) | 340 (272, 409) | 0.23 | 307 (253, 360) | 311 (255, 366) | 0.91 |
| Red blood cells (RBC; 106 cells/µL) | 7.72 (7.21, 8.23) | 7.1 (6.7, 7.7) | 0.17 | 7.23 (6.86, 7.59) | 7.03 (6.65, 7.41) | 0.45 |
| Segmented neutrophils (WBC %) | 30.5 (26.4, 34.6) | 31.1 (26.9, 35.4) | 0.83 | 20.0 (16.7, 23.3) | 26.6 (23.2, 30.0) | 0.01 |
| White blood cells (WBC; 103 cells/µL) | 8.94 (8.18, 9.78) | 7.96 (7.26, 8.73) | 0.07 | 8.24 (7.33, 9.26) | 8.1 (7.12, 9.10) | 0.80 |