Respiratory Symptoms due to Occupational Exposure to Formaldehyde and MDF Dust in a MDF Furniture Factory in Eastern Thailand

Table 2

Level of formaldehyde concentration (ppm) and MDF wood dust (mg/m³) in the work environment.

Department		Formaldehyde concentration (ppm)	Department		MDF wood dust concentration (mg/m^3)
Office	12		Office	6
Mean (SD)		1.52 (1.48)	Mean (SD)		1.71 (0.98)
Median (min, max)		1.09 (0.0, 4.21)	Median (min, max)		1.69 (0.66, 3.17)
Combination	10		Combination	6
Mean (SD)		0.90 (1.85)	Mean (SD)		11.24 (0.40)
Median (min, max)		0 (0, 5.37)	Median (min, max)		11.38 (10.74, 11.59)
Edging	10		Edging	6
Mean (SD)		0.68 (1.44)	Mean (SD)		5.62 (0.41)
Median (min, max)		0.0 (0.0, 4.51)	Median (min, max)		5.65 (4.88, 6.14)
Fitting	11		Fitting	6
Mean (SD)		2.36 (2.01)	Mean (SD)		6.54 (3.23)
Median (min, max)		2.29 (0.0, 5.97)	Median (min, max)		5.40 (4.46, 13.09)
Clearing	9		Clearing	6
Mean (SD)		8.32 (7.22)	Mean (SD)		10.46 (1.24)
Median (min, max)		5.03 (0.43, 20.85)	Median (min, max)		10.51 (8.92, 11.97)
Drilling	8		Drilling	6
Mean (SD)		0.57 (0.65)	Mean (SD)		11.10 (1.23)
Median (min, max)		0.37 (0.0, 1.70)	Median (min, max)		11.72 (9.06, 12.17)
Laminating	10		Laminating	6
Mean (SD)		4.55 (3.09)	Mean (SD)		5.99 (1.60)
Median (min, max)		4.32 (0.39, 11.96)	Median (min, max)		5.64 (4.49, 9.02)
Wrapping	10		Wrapping	6
Mean (SD)		1.41 (1.76)	Mean (SD)		10.04 (2.74)
Median (min, max)		0.59 (0.0, 4.12)	Median (min, max)		11.71 (6.37, 11.92)
Packing	10		Packing	6
Mean (SD)		1.89 (2.28)	Mean (SD)		3.96 (1.24)
Median (min, max)		0.98 (0.0, 6.57)	Median (min, max)		3.21 (3.07, 5.69)
Line	10		Line	6
Mean (SD)		4.46 (3.91)	Mean (SD)		10.04 (2.74)
Median (min, max)		4.07 (0.0, 14.0)	Median (min, max)		11.71 (6.37, 11.92)
Total	100		Total	60
Mean (SD)		2.62 (3.67)	Mean (SD)		7.67 (3.63)
Median (min, max)		1.32 (0.0, 20.85)	Median (min, max)		6.50 (0.66, 13.09)