Variables Yes (N=140) No (N=248) OR 95% CI P-value*
n % n % Lower Upper
Local exhaust provided and working:
Yes 57 44.5% 71 55.5% 1.71 1.11 2.65 0.015
No 83 31.9% 177 68.1% 1.00
Type of factory:
Cereal store 38 43.7% 49 56.3% 2.95 1.01 8.61 0.048
Flour packing 19 23.5% 62 76.5% 1.17 0.38 3.54 0.788
Bakery 21 30.9% 47 69.1% 1.70 0.56 5.16 0.351
Furniture Manufacture 57 44.5% 71 55.5% 3.05 1.07 8.67 0.036
Stone cutting 5 20.8% 19 79.2% 1.00