Duration of employment | No | FVC in Litre | FVC% | FEV1 in Litre | FEV1% | PEFR Litre/Sec | |
<12 month | 43 | 3.93 ± 0.39 | 90.60 ± 5.49 | 2.98 ± 0.59 | 77.09 ± 13.17 | 7.15 ± 1.10 | |
12 - 17 months | 39 | 3.87 ± 0.35 | 86.26 ± 7.39 | 2.56 ± 0.66 | 66.15 ± 17.18 | 6.68 ± 1.09 | |
≥18 months | 26 | 3.97 ± 0.61 | 86.88 ± 10.81 | 2.35 ± 0.78 | 59.62 ± 18.64 | 6.60 ± 0.97 | |
F-ratio | 0.39 | 3.691 | 8.063 | 10.466 | 2.89 | ||
p value | 0.679 | 0.028 | 0.001 | 0.0001 | 0.0001 | ||