Data collection was effected by way of an
interviewer-administered structured questionnaire, to
determine the socio-demographic characteristics,
years of exposure as deduced from date of
employment, site or position at workplace, use of
safety gadgets such as dust masks, earplugs, hand
gloves, safety boots, goggles and work overalls.
Information on general health, history of past
disease(s) and habits such as smoking and alcohol
consumption were obtained