Table 1 Baseline Characteristics of Study Participants Stratified by Leukocyte Counts (n = 3,453).
From: Association between Leukocyte Counts and Physical Fitness in Male Military Members: The CHIEF Study
Characteristics | WBC counts 0th–25th % (n = 768) | WBC counts 25th–50th % (n = 1,015) | WBC counts 50th–75th % (n = 842) | WBC counts 75th–100th % (n = 828) | p-value |
|---|---|---|---|---|---|
Age (years) | 29.6 ± 5.9 | 29.1 ± 5.9 | 29.2 ± 5.9 | 29.3 ± 5.8 | 0.34 |
Specialty, % | |||||
Army | 409 [53.3] | 532 [52.4] | 409 [48.6] | 397 [47.9] | 0.11 |
Navy | 115 [20.2] | 217 [21.4] | 173 [20.5] | 194 [23.4] | |
Air force | 204 [26.5] | 266 [26.2] | 260 [30.9] | 237 [28.6] | |
Body mass index (kg/m2) | 24.3 ± 2.9 | 24.6 ± 3.0 | 25.0 ± 3.1 | 25.4 ± 3.2 | <0.01 |
Waist circumference (cm) | 81.8 ± 7.6 | 82.8 ± 7.8 | 83.7 ± 7.8 | 85.1 ± 8.1 | <0.01 |
Systolic blood pressure (mmHg) | 116.0 ± 12.9 | 118.1 ± 12.9 | 118.8 ± 13.1 | 120.4 ± 13.3 | <0.01 |
Diastolic blood pressure (mmHg) | 68.8 ± 9.9 | 70.5 ± 9.9 | 70.8 ± 10.2 | 71.9 ± 10.3 | <0.01 |
Blood test | |||||
Total cholesterol (mg/dL) | 171.4 ± 32.2 | 171.2 ± 33.5 | 176.6 ± 35.0 | 178.0 ± 34.3 | <0.01 |
Serum triglyceride (mg/dL) | 91.6 ± 66.8 | 107.3 ± 113.5 | 123.8 ± 104.8 | 131.2 ± 3.2 | <0.01 |
Fasting glucose (mg/dL) | 92.7 ± 9.8 | 93.7 ± 14.1 | 93.7 ± 12.1 | 94.3 ± 16.1 | 0.10 |
HDL-C (mg/dL) | 49.8 ± 10.3 | 48.2 ± 9.4 | 47.3 ± 9.6 | 46.5 ± 9.4 | <0.01 |
LDL-C (mg/dL) | 103.1 ± 28.0 | 103.6 ± 29.3 | 107.7 ± 30.1 | 109.5 ± 30.4 | <0.01 |
WBC counts (103/mm3) | 4.9 ± 0.4 | 6.0 ± 0.3 | 7.0 ± 0.3 | 8.4 ± 0.7 | <0.01 |
(WBC Range: Min-Max) | 4.00–5.49 | 5.50–6.49 | 6.50–7.49 | 7.50–9.99 | |
Hemoglobin, (g/dL) | 15.0 ± 0.9 | 15.1 ± 1.0 | 15.2 ± 1.0 | 15.4 ± 1.0 | <0.01 |
Alcohol intake status, % | |||||
Former or never | 466 [60.7] | 596 [58.7] | 454 [53.9] | 424 [51.2] | <0.01 |
Current | 302 [39.3] | 419 [41.3] | 388 [46.1] | 404 [48.8] | |
Tobacco smoking status, % | |||||
Never smoker | 535 [70.8] | 692 [69.1] | 485 [58.4] | 418 [51.4] | <0.01 |
Current smoker | 221 [29.2] | 310 [30.9] | 346 [41.6] | 395 [48.6] | |
Physical activity, % | |||||
Never or occasionally | 151 [19.7] | 204 [20.1] | 192 [22.8] | 174 [21.0] | 0.75 |
1–2 times/week | 287 [37.4] | 387 [38.1] | 314 [37.3] | 307 [37.1] | |
≥ 3 times/week | 330 [43.0] | 424 [41.8] | 336 [39.9] | 347 [41.9] | |
