Table 4: Effect of occupation on lung functions ANOVA statics.

ParameterPunch/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

Exposure8.25 (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
Age29.6 (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
BMI21.38 (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
FVC3.47 (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
FEV12.74 (.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 ratio78.73 (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
PEFR7.34 (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
FIVC3.17 (.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
PIFR3.62 (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