ผลกระทบของฝุ่นพีเอ็ม-เท็นและฝุ่นซิลิกาที่มีต่อภาวะสุขภาพของระบบทางเดินหายใจของผู้ประกอบการสกัดหินและประชาชนที่อาศัยอยู่บริเวณใกล้เคียงในเขตจังหวัดสระบุรี / วีระอนงค์ ประสพโชค = Effects of PM-10 and silica dust on respiratory health of rock cutting workers and nearby residential population in Saraburi province / Weera-anong Prasopchoke
This study reports the result of an investigation of the health effects of PM-10 and Silica dust among non-smoking adult age between 20-65 years old in Saraburi Province. The Epidemiologic cross- sectional studied have observed associations between respiratory symptoms and PM-10 and silica dust modified during December, 1997 - April, 1998. ATS-DLD 78A Questionnaires (Thai version) were used for 600 subjects living in 3 villages in Saraburi province. The response rate of answering questionnaires is 58.67%. Pulmonary function test and Chest X-rays were performed in 150 rock cutting subjects and 85 resident controls. The 60 subjects and 20 controls were randomly selected to measure individual exposure dust using personal sampling pump. The mean of exposure PM-10 in subjects were 0.300±0.375 mg/m3 . Mean of %SiO2 in subjects were 32.69±13.65 and mean of exposure silica dust in subjects were 0.269±0.375 mg/m3 (TLV : 0.101-0.778 mg/m3 ). Among 14 subjects theirs exposure were over the ambient standard. Mean of %FVC and %FEV1 in the subjects were 80.26 and 77.00 that less than the controls. The abnormal result of pulmonary function test and chest x-rays with pneumoconiosis in these subjects were 61 cases (40.60%) and 26 cases (17.30%) that higher than the controls. The duration and increase in PM-10 and total of silica dust concentration related to abnormality in respiratory symptoms (p < 0.05)