Table 1 Characteristics, benzene exposure levels, fat content, and erythroid-related hematologic parameters in workers in different workplaces
Variablesa | Control group (n = 338) | Exposed group (n = 1331) | P value |
|---|---|---|---|
General characteristics | |||
 Age (years) | 46.46 ± 7.25 | 40.20 ± 7.37 | < 0.001b |
 Gender (male/female, %male) | 237/101 (70.10) | 1014/317 (76.20) | 0.022c |
 Smoking status (smoker/non-smoker, %smoker) | 98/240 (29.00) | 466/865 (35.00) | 0.037c |
 Drinking status (drinker/non-drinker, %drinker) | 103/235 (30.50) | 490/841 (36.80) | 0.030c |
 Work years (years) | 25.94 ± 8.45 | 18.93 ± 8.52 | < 0.001b |
Benzene exposure levels | |||
 SPMA (μg/g creatinine) | 0.18 (0.09, 0.44) | 0.37 (0.15, 1.09) | < 0.001d |
Fat content indices | |||
 BF% (%) | 26.66 ± 5.29 | 23.67 ± 23.67 | 0.003e |
 TC (mmol/L) | 5.48 ± 0.94 | 5.20 ± 0.96 | 0.410d |
 TG (mmol/L) | 1.66 ± 1.11 | 1.59 ± 1.41 | 0.305d |
 Fatty liver (yes/no, %yes) | 84/250 (25.10) | 311/1016 (23.40) | 0.551c |
Erythroid-related hematologic parameters | |||
 RBC count (×1012/L) | 4.94 ± 0.58 | 4.96 ± 0.58 | 0.157d |
 Hb (g/L) | 142.71 ± 13.93 | 143.60 ± 14.53 | 0.286d |
 HCT (%) | 42.62 ± 3.52 | 43.25 ± 4.07 | 0.027d |
 MCV (fL) | 86.90 ± 8.15 | 87.70 ± 8.17 | 0.030d |
 MCHC (g/L) | 336.87 ± 8.22 | 331.92 ± 10.53 | < 0.001d |
 RDW-CV (%) | 12.90 ± 1.03 | 13.17 ± 1.36 | 0.792d |
 RDW-SD (fL) | 39.87 ± 2.57 | 43.86 ± 3.35 | < 0.001d |