Table 2.
Laboratory data of gas station workers
| Data | Group 1 | Group 2 | Group 1 × Group 2 (P value) |
Total of workers | Controls | Total of workers × controls (P value) |
|---|---|---|---|---|---|---|
| Platelets (109/L) | 254.16 (± 58.83) | 255.52 (± 70.85) | 0.969 | 254.43 (± 60.99) | 278.29 (± 49.70) | 0.001 |
| Gamma-GT (U/L) | 37.17 (± 39.40) | 28.81 (± 12.61) | 0.819 | 35.74 (± 35.86) | 27.00 (± 37.30) | < 0.001 |
| Direct bilirubin (mg/dL) | 0.39 (± 0.17) | 0.34 (± 0.15) | 0.223 | 0.14 (± 0.05) | 0.16 (± 0.07) | 0.046 |
| Leukocytes (/μL) | 7318.1 (± 2102.3) | 7226.2 (± 1291.2) | 0.795 | 7300.22 (± 1966.01) | 7778.61 (± 1980.38) | 0.066 |
| Neutrophils (%) | 55.41 (± 9.80) | 55.78 (± 8.36) | 1.00 | 55.49(± 9.51) | 59.46 (± 10.92) | 0.001 |
| Eosinophils (%) | 3.10 (± 2.76) | 2.73 (± 1.61) | 0.951 | 3.03 (± 2.58) | 2.14 (± 3.09) | < 0.001 |
| Basophils (%) | 0.42 (± 0.34) | 0.33 (± 0.23) | 0.577 | 0.40 (± 0.32) | 0.27 (± 0.43) | < 0.001 |
| Typical lymphocytes (%) | 33.62 (± 8.92) | 35.05 (± 7.89) | 0.385 | 33.89 (± 8.72) | ±32.44 (±9.79) | 0.152 |
| Monocytes (%) | 7.40 (± 2.04) | 6.24 (± 1.55) | 0.024 | 7.18 (± 2.00) | 5.42 (± 1.95) | < 0.001 |
| Reticulocytes (%) | ±1.13 (±0.38) | 1.19 (±0.30) | 0.209 | 1.15 (± 0.36) | 1.27 (± 0.46) | 0.080 |
| Women | ||||||
| Erythrocytes (million/μL) | 4.48 (± 0.22) | 4.31 (± 0.35) | 0.148 | 4.44 (± 0.37) | 4.62 (± 0.48) | 0.056 |
| Hemoglobin | 13.06 (± 1.1) | 12.54 (± 1.09) | 0.117 | 12.92(± 1.11) | 13.58 (± 1.88) | 0.021 |
| Hematocrit (%) | 38.76 (± 2.98) | 37.42 (± 3.02) | 0.216 | 38.40(± 3.02) | 40.18 (± 3.56) | 0.002 |
| Mean corpuscular volume (fl) | 86.66 (± 5.21) | 86.86 (± 3.73) | 0.845 | 86.72 (± 4.82) | 87.12 (± 5.13) | 0.511 |
| Men | ||||||
| Erythrocytes (million/μL) | 4.98 (± 0.37) | 4.95 (± 0.11) | 0.904 | 4.98 (± 0.35) | 4.72 (± 0.45) | 0.001 |
| Hemoglobin | 14.47 (± 1.13) | 14.49 (± 0.71) | 0.884 | 14.47 (± 1.08) | 13.82 (± 2.08) | 0.003 |
| Hematocrit (%) | 42.37 (± 2.86) | 42.51 (± 1.55) | 1.000 | 42.38 (± 2.72) | 42.23 (± 3.71) | 0.370 |
| Mean corpuscular volume (fl) | 84.90 (± 4.89) | 84.90 (± 2.42) | 0.645 | 85.42 (± 4.35) | 88.07 (± 5.07) | 0.001 |
P value < 0.05 was considered significant
Normal values: Platelets 150–400 109/L; gamma-GT 8-71 U/L; direct bilirubin up to 0.3 mg/dL; leukocytes 4000–10,000/μL; neutrophils 40–75%; eosinophils 1–6%; basophils 0–1%; typical lymphocytes 20–45%; monocytes 2–10%, reticulocytes 0.5–2%; erythrocytes 4.5–6.5 million/μL; hemoglobin 13.5–18 g/dL, hematocrit 40–54%, mean corpuscular volume 76–96 fl. Descriptive measures: a (± b), a = average and b = standard deviation