Table 2.
Immune cell absolute values and percentages by long-term shiftwork status among Buffalo, New York police officers.
| Dependent Variables | Day (n = 184) | Evening (n = 141) | Night (n = 100) | Evening + Night (n = 241) |
p Values |
||
|---|---|---|---|---|---|---|---|
| D vs. E | D vs. N | D vs. E + N | |||||
| White blood cells (×109/L) | 5.54 (5.27–5.80) | 5.98 (5.65–6.31) | 6.16 (5.78–6.55) | 6.06 (5.77–6.34) | 0.02 | <0.01 | <0.01 |
| Neutrophil absolute (×109/L) | 3.11 (2.93–3.31) | 3.44 (3.20–3.69) | 3.59 (3.31–3.87) | 3.50 (3.28–3.72) | 0.03 | <0.01 | <0.01 |
| Lymphocyte absolute (×109/L) | 1.76 (1.68–1.85) | 1.82 (1.72–1.93) | 1.90 (1.78–2.02) | 1.86 (1.76–1.95) | 0.32 | 0.05 | 0.11 |
| Monocyte absolute (×109/L) | 0.44 (0.42–0.46) | 0.45 (0.42–0.48) | 0.49 (0.45–0.52) | 0.46 (0.44–0.49) | 0.49 | 0.01 | 0.10 |
| Neutrophil (%) | 55.6 (54.2–57.0) | 57.5 (55.7–59.3) | 56.5 (54.4–58.5) | 57.1 (55.5–58.7) | 0.08 | 0.47 | 0.13 |
| Lymphocyte (%) | 33.0 (31.7–34.2) | 31.6 (29.9–33.2) | 31.9 (30.0–33.9) | 31.7 (30.2–33.1) | 0.22 | 0.40 | 0.22 |
| Monocyte (%) | 8.15 (7.80–8.50) | 7.79 (7.34–8.24) | 7.88 (7.37–8.39) | 7.82 (7.43–8.22) | 0.17 | 0.35 | 0.17 |
| Eosinophil (%) | 2.71 (2.43–2.98) | 2.45 (2.09–2.80) | 2.79 (2.39–3.19) | 2.58 (2.27–2.90) | 0.21 | 0.72 | 0.51 |
| Basophil (%) | 0.58 (0.54–0.63) | 0.50 (0.45–0.56) | 0.47 (0.40–0.53) | 0.49 (0.44–0.54) | 0.01 | <0.01 | <0.01 |
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, race, age, tobacco use, triglycerides, glycosylated hemoglobin, leptin, and amount of vegetable and fruit servings consumed per day.