Variables	Yes (N=140)		No (N=248)		OR	95% CI		P-value*
	n	%	n	%		Lower	Upper
Mean spirometry (FEV1/FCV):
FEV1/FVC% value < 80	42	40.8%	61	59.2%	1.31	0.83	2.09	0.247
FEV1/FVC% value > 80	98	34.4%	187	65.6%	1.00
Mean spirometry (FEV1/FCV):
<Expected MPF	114	36.0%	203	64.0%	0.97	0.57	1.66	0.917
≥Expected MPF	26	36.6%	45	63.4%	1.00
Factory environment PM10 in mg/m3:
Bakery (3.08)	21	30.4%	48	69.6%	1.66	0.55	5.05	0.370
Flour Packaging (9.7)	5	20.8%	19	79.2%	1.00
Stone Cutting (11.22)	19	23.8%	61	76.3%	1.18	0.39	3.60	0.766
Cereal Store (17.16)	57	44.5%	71	55.5%	3.05	1.07	8.67	0.036
Furniture Manufacture (17.96)	38	43.7%	49	56.3%	2.95	1.01	8.61	0.048