PARAMETER NON-OILWORKERS (N=10) Mean  ± SD   OIL WORKERS(N=30) Mean ± SD P-Value(2-tailed) Normal range & Unit of parameter
AGE 42.6 ± 7.25 40.33 ± 6.9 0.379  
SERVICE PERIOD    13.7 ± 7.21 14.97 ± 5.84        0.579 Up to 35Yrs
ESR 8.9 ± 8.16 26.27 ± 20.74* 0.014 0-7mm/hr (M), 0-10mm/hr (F)
Hb 11.59 ± 1.55 11.42 ± 1.31 0.741 13-18g/dl (M), 12-15g/dl (F)
PCV 38 ± 4.94 37.57 ± 4.29 0.791 40-50%(M), 36-47%(F)
PLATELETS × 109 231 ± 58.14 232 ± 52.59 0.960 150-400 ×109/L
TOTAL WBC × 109 7.32 ± 1.65 6.1 ± 1.61* 0.046 4.0-11.0 ×109/L
LYMPHOCYTE 35.9 ± 11.27 52.03 ± 8.65* 0.000  
GRANULOCYTE 64.1 ± 11.27 47.97 ± 8.65* 0.000  
T-test was the statistical tool applied. * indicates statistically significant difference
Table 3: Mean values of haematological parameters studied in female oil workers and female non-oil workers.