Anicteric hepatoxicity: a potential health risk of occupational exposures in Nigerian petroleum oil refining and distribution industry

Table 3 Mean values of liver function parameters studied in female oil workers & non-oil female workers

Parameter	Non-oilworkers (N = 10)	Oil workers (N = 30)	P-value (2-tailed)	Normal range & unit of parameter
Parameter	Mean ± SD	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 35 yrs
Total bilirubIin	0.54 ± 0.07	0.61 ± 0.17*	0.228	0- 1.00 mg/dl
ALK. PHOS	68.7 ± 17.13	121.87 ± 39.16	0.000	50-250 U/L
AST	24.63 ± 7.34*	17.73 ± 5.67	0.004	0-45 U/L (M), 0-35 U/L (F)
ALT	21.3 ± 12.79	18.41 ± 8.15	0.408	0-45 U/L (M), 0-35 U/L (F)

T-test was the statistical tool applied. *indicates statistically significant difference.

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