Research Article
Occupational Exposure to Respirable Suspended Particulate Matter and Lung Functions Deterioration of Steel Workers: An Exploratory Study in India
Table 4
Effect of occupation on lung functions ANOVA statics.
| | Parameter | Punch/blank (20)
Mean (SD) | Forging (46)
Mean (SD) | Grinding (77)
Mean (SD) | Moulding (73)
Mean (SD) | Tool room (36)
Mean (SD) | Quality (22)
Mean (SD) | Welding (17)
Mean (SD) | Nickel/chrome plating (18) Mean (SD) | Control (74)
Mean (SD) | “P” value |
| | Exposure | 8.25 (6.34) | 7.60 (5.22) | 6.87 (4.76) | 11.66 (8.11) | 11.47 (5.74) | 10.52 (11.10) | 8.29 (8.59) | 6.30 (5.98) | 8.00 (5.98) | 0.000 | | Age | 29.6 (7.65) | 28.69 (7.38) | 29.57 (8.27) | 34.01 (8.55) | 35.30 (8.60) | 30.63 (12.10) | 29.82 (9.29) | 30.00 (12.6) | 29.36 (6.29) | 0.001 | | BMI | 21.38 (2.57) | 21.90 (2.92) | 22.54 (4.08) | 22.06 (2.27) | 23.87 (3.91) | 23.19 (3.33) | 22.50 (3.65) | 22.42 (2.38) | 22.05 (2.53) | 0.075 | | FVC | 3.47 (0.44) | 3.35 (0.49) | 3.28 (0.64) | 3.59 (0.67) | 3.45 (0.44) | 3.63 (0.78) | 3.59 (0.54) | 3.70 (054) | 3.82 (0.67) | 0.000 | | FEV1 | 2.74 (.50) | 2.73 (0.49) | 2.61 (0.56) | 2.71 (0.55) | 2.70 (0.43) | 2.85 (0.56) | 2.86 (0.49) | 2.97 (0.55) | 3.31 (0.56) | 0.000 | | FEV1/FVC ratio | 78.73 (9.12) | 81.50 (9.53) | 79.37 (9.23) | 75.46 (7.83) | 78.38 (8.93) | 79.11 (9.98) | 79.61 (5.07) | 80.10 (6.51) | 87.24 (10.08) | 0.000 | | 2.63 (1.15) | 2.88 (1.10) | 2.53 (0.99) | 2.36 (0.93) | 2.57 (0.99) | 2.72 (1.00) | 2.70 (0.80) | 2.90 (1.11) | 3.86 (1.15) | 0.000 | | PEFR | 7.34 (1.75) | 7.15 (1.14) | 6.69 (1.79) | 6.45 (1.52) | 7.15 (1.57) | 7.45 (1.80) | 7.38 (1.65) | 7.17 (1.77) | 7.73 (1.66) | 0.001 | | FIVC | 3.17 (.37) | 2.96 (0.63) | 2.71 (0.89) | 3.06 (0.81) | 3.05 (0.52) | 3.25 (0.94) | 3.02 (0.81) | 3.07 (0.96) | 3.37 (0.79) | 0.000 | | PIFR | 3.62 (1.10) | 3.94 (1.29) | 3.22 (1.37) | 3.86 (1.52) | 3.55 (1.18) | 4.00 (1.49) | 4.17 (1.39) | 3.64 (1.49) | 4.55 (1.53) | 0.000 |
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