Haematological variables before and after exercise in healthy white and African/Afro-Caribbean subjects
| Variable | Caucasians mean (SD) or median (range) | Africans/Afro-Caribbeans mean (SD) or median (range) | Differences in mean or median (95% CI) | p Value |
|---|---|---|---|---|
| Cell counts are given as ×109 cells/litre. | ||||
| p Values of < 0.05 are shown in bold type. | ||||
| *p < 0.05 for the difference from the pre-exercise value; **p < 0.01 for the difference from the pre-exercise value; ***p < 0.001 for the difference from the pre-exercise value. | ||||
| Pre-exercise WBC | 5.73 (1.44) | 4.82 (0.26) | 0.91 (0–1.81) | 0.049 |
| Postexercise WBC | 8.11 (2.14)*** | 6.51 (1.80)*** | 1.61 (0.18–3.03) | 0.028 |
| % Increase in WBC | 40.1 (12.7–93.1)*** | 25.95 (7.7–126.1)*** | 10.5 (−6.4 to 25) | 0.27 |
| Pre-exercise neutrophil count | 3.34 (1.02) | 2.36 (0.21) | 0.98 (0.03–1.65) | 0.006 |
| Postexercise neutrophil count | 4.18 (1.22)*** | 2.86 (1.01)*** | 1.33 (0.52–2.13) | 0.002 |
| % Increase in neutrophil count | 26.4 (−2.4 to 57.1) | 13.96 (5.9 to 88.9) | 6.8 (−5.5 to 19.05) | 0.169 |
| Absolute increase in neutrophil count | 0.84 (0.53) | 0.49 (0.48) | 0.35 (0.02 to 0.68) | 0.036 |
| Pre-exercise monocyte count | 0.36 (0.10) | 0.34 (0.08) | 0.02 (−0.04 to 0.09) | 0.449 |
| Postexercise monocyte count | 0.50 (0.30 to 1.00)*** | 0.40 (0.30 to 0.60)** | 0.10 (0 to 0.20) | 0.026 |
| % Increase in monocyte count | 49.4 (36.0) | 23.75 (24.5) | 25.6 (3.4 to 47.9) | 0.025 |
| Absolute increase in monocyte count | 0.1 (0 to 0.4) | 0.1 (−0.1 to 0.2) | 0.1 (0.05 to 0.15) | 0.144 |
| Pre-exercise eosinophil count | 0.11 (0.07 to 0.31)*** | 0.11 (0.04 to 0.74)* | 0.01 (−0.05 to 0.05) | 0.63 |
| Postexercise eosinophil count | 0.15 (0.08 to 0.42) | 0.13 (0.02 to 0.75) | 0.03 (−0.02 to 0.07) | 0.29 |
| % Increase in eosinophil count | 36.0 (30.65) | 14.7 (30.1) | 21.3 (−0.65 to 43.2) | 0.057 |