Table 3.
Immune cell absolute values and percentages by short-term 7-day shiftwork status among Buffalo, New York police officers.
| Dependent Variables | Day (n = 200) | Evening (n = 104) | Night (n = 82) | Evening + Night (n = 186) |
p Values |
||
|---|---|---|---|---|---|---|---|
| D vs. E | D vs. N | D vs. E + N | |||||
| White blood cells (×109/L) | 5.58 (5.34–5.83) | 5.90 (5.56–6.23) | 5.99 (5.62–6.36) | 5.94 (5.66–6.21) | 0.10 | 0.05 | 0.03 |
| Neutrophil absolute (×109/L) | 3.22 (3.03–3.40) | 3.20 (2.94–3.45) | 3.22 (2.94–3.50) | 3.20 (3.00–3.41) | 0.86 | 0.99 | 0.92 |
| Lymphocyte absolute (×109/L) | 1.72 (1.64–1.80) | 1.94 (1.82–2.05) | 2.05 (1.92–2.17) | 1.98 (1.89–2.08) | <0.01 | <0.01 | <0.01 |
| Monocyte absolute (×109/L) | 0.44 (0.42–0.46) | 0.51 (0.48–0.54) | 0.51 (0.48–0.55) | 0.51 (0.48–0.54) | <0.01 | <0.01 | <0.01 |
| Neutrophil (%) | 56.6 (55.3–57.9) | 54.3 (52.5–56.2) | 52.8 (50.7–54.8) | 53.6 (52.1–55.1) | 0.03 | <0.01 | <0.01 |
| Lymphocyte (%) | 32.0 (30.7–33.2) | 33.5 (31.8–35.2) | 34.5 (32.6–36.4) | 33.9 (32.5–35.3) | 0.11 | 0.02 | 0.02 |
| Monocyte (%) | 8.16 (7.80–8.52) | 9.01 (8.52–9.50) | 8.60 (8.06–9.15) | 8.83 (8.43–9.24) | <0.01 | 0.15 | 0.01 |
| Eosinophil (%) | 2.74 (2.48–3.02) | 2.81 (2.44–3.19) | 3.14 (2.73–3.55) | 2.95 (2.65–3.26) | 0.75 | 0.09 | 0.25 |
| Basophil (%) | 0.55 (0.51–0.60) | 0.51 (0.46–0.57) | 0.50 (0.44–0.57) | 0.51 (0.46–0.56) | 0.24 | 0.15 | 0.12 |
Values represent least-square means and 95% confidence intervals via general linear models. Abbreviations: D = day, E = evening, N = night. Adjustments: All models adjusted for sex, age, tobacco use, triglycerides, glycosylated hemoglobin, leptin, and amount of vegetable and fruit servings consumed per day.