Table 3

Cross sectional comparisons of hazmat technicians v support controls at year 1 and year 3 examinations (independent samples t tests)

Variable Year Technicians Support p Value
Liver function tests:
 Alkaline phosphatase (U/l)Year 182 (21)84 (22)0.491
n=266n=70
Year 382 (20)84 (19)0.339
n=269n=63
 Aspartate aminotransferase (U/l)Year 125 (10)24 (9)0.360
n=266n=71
Year 325 (10)25 (9)0.805
n=269n=63
 Alanine aminotransferase (U/l)Year 136 (20)35 (21)0.652
n=266n=71
Year 336 (18)38 (18)0.418
n=269n=62
Renal function tests:
 Blood urea nitrogen (mmol/l)5-150 Year 15.7 (1.4)5.7 (1.4)0.999
n=268n=71
Year 35.3 (1.4)5.7 (1.4)0.145
n=269n=63
 Creatinine (μmol/l)5-151 Year 197 (18)97 (18)0.161
n=268n=71
Year 388 (18)88 (18)0.938
n=269n=63
Haematological tests:
 White blood cells (×109/l)Year 16.6 (2.2)6.6 (1.4)0.876
n=266n=71
Year 36.6 (1.7)6.7 (1.6)0.682
n=269n=63
 Packed cell volume (fraction)Year 10.45 (0.02)0.45 (0.03)0.698
n=265n=71
Year 30.46 (0.03)0.46 (0.03)0.165
n=269n=63
 Platelet count (×109/l)Year 1239 (51)252 (58)0.099
n=268n=70
Year 3231 (53)246 (52)0.053
n=269n=63

  • ↵5-150 mg/dl=2.81 (mmol/l).

  • ↵5-151 mg/dl=μmol/(88 l).