Exposure of Petrol Station Attendants and Auto Mechanics to Premium Motor Sprit Fumes in Calabar, Nigeria

Table 3

Mean methaemoglobin (MetHb) and pack cell volume (PCV) based on route and self-reported duration of exposure of AM to Petrol (PMS) fumes.

Route of exposure	Estimated (self-reported) daily frequency of exposure
	<1 time	1-2 times	3-4 times	≥5 times
	Mean MetHb (%)
Aspiration of petrol by mouth (𝑁=32)	0.0 (𝑛=0)	8.9 ± 2.7 (𝑛=23)	10.2±2.6^∗ (𝑛=9)	0.0 (𝑛=0)
Washing of hands with pPetrol (𝑁=50)	0.0 (𝑛=0)	10.6 ± 2.6 (𝑛=20)	11.1 ± 3.8 (𝑛=16)	13.6±5.6^∗ (𝑛=14)
	Mean pack cell volume (PCV)
Aspiration of petrol by mouth (𝑁=32)	0.0 (𝑛=0)	31.4 ± 4.9 (𝑛=23)	30.4 ± 4.6 (𝑛=9)	0.0 (𝑛=0)
Washing of hands with petrol (𝑁=50)	0.0 (𝑛=0)	30.8 ± 4.8 (𝑛=20)	30.2 ± 4.6 (𝑛=16)	28.8±3.8^∗ (𝑛=14)

^∗𝑃 value <.05.