Research Article
Respiratory Symptoms due to Occupational Exposure to Formaldehyde and MDF Dust in a MDF Furniture Factory in Eastern Thailand
Table 3
Respiratory irritation symptoms.
| | Variables | Formaldehyde exposed Group (ppm) | Total
(%) | MDF dust exposed group (mg/m3) | Total
(%) | Low
(0.66–3.44) | Moderate
(3.45–6.89) | High
(>6.89) | Low
(1.71–3.18) | Moderate
(3.19–6.37) | High
(>6.37) |
| | (1) Cough in the morning when they wake up | 67 (18) | 11 (25) | 4 (18.2) | 82 (18.7) | 17 (14.7) | 23 (17.3) | 42 (22.1) | 82 (18.7) | | (2) Cough during the daytime or night-time | 103 (27.6) | 14 (31.8) | 8 (36.4) | 125 (28.5) | 21 (18.1) | 36 (27.1) | 68 (35.8) | 125 (28.5) | | (3) Cough during the daytime or night-time for >3 months over a period of 1 year | 40 (10.7) | 6 (6.8) | 1 (4.5) | 44 (10) | 7 (6) | 13 (9.8) | 24 (12.6) | 44 (10) | | (4) Having phlegm regularly on waking | 63 (16.9) | 6 (13.6) | 3 (13.6) | 72 (16.4) | 11 (9.5) | 20 (15.0) | 41 (21.6) | 72 (16.4) | | (5) Having phlegm frequently during the daytime or night-time | 44 (11.8) | 6 (13.6) | 1 (4.5) | 51 (11.6) | 10 (8.6) | 9 (6.8) | 32 (16.8) | 51 (11.6) | | (6) Having phlegm for about 3 months over a 1-year period | 58 (15.5) | 8 (18.2) | 0 (0) | 66 (15) | 12 (10.3) | 16 (12) | 38 (20) | 66 (15) | | (7) Having a stuffy nose, chest discomfort, or inflammation in the nose when the temperature is low | 104 (27.9) | 8 (18.2) | 9 (40.9) | 121 (27.6) | 21 (18.1) | 34 (25.6) | 66 (34.7) | 121 (27.6) |
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