Results Characteristics of workers Twenty-six (83.9%) workers at the assembly section were male. Fifteen (48.4%) were 51 yr old and more. Twenty seven (87.1%) were married. Fifteen (48.4%) received the
education at a primary school or lower. Twenty-nine (93.5%)
had worked in the factory for 10 yr and more. Seven (22.6%)
were smokers. Thirteen (41.9%) were drinkers.
A record of illness
Sixteen (51.6%) workers at the assembly section had
personal illness, for example diabetes, allergy. Fourteen
(45.2%) had a record of lead poisoning (blood lead level is
more than 60 µg/dl) in the factory. Twenty-two (71.0%)
had a record of lead poisoning in adjoining sections in the
factory. Symptoms complained at present are shown in Table
2. Many workers complained of weakness, fatigue of muscle,
mood swings and forgetfulness.
Working conditions
All workers at the assembly section had worked for 8 h a
day on the average and 5 d a week. Fourteen (45.2%) workers