Table 3.

Report of asthma attack among farm operators with current farm work–related asthma and current non–farm work–related asthma.

Asthma characteristic	Current asthma, farm work related					Current asthma, not farm work related
	Proportion of operators who use respirators	95% CI*	aPOR Respirator vs. no respirator*†	95% CI*	P	Proportion of operators who use respirators	95% CI*	aPOR Respirator vs. no respirator*†	95% CI*	P
Asthma attack past 12 months
Yes	58.3	39.8–76.9	0.8	0.3–2.5	.75	48.3	39.1–57.6	1.4	0.8–2.4	.19
No	63.7	44.3–83.0	1.00 (Ref)			40.3	31.9–48.7	1.00 (Ref)
Asthma attack past 12 months—at work
Yes	69.2	50.8–87.6	11.3	1.3–101.2	.03	54.9	38.4–71.3	1.6	0.7–3.7	.30
No	40.3	4.6–76.1	1.00 (Ref)			45.8	34.7–56.9	1.00 (Ref)

Note. Numbers in bold show a statistically significant difference between groups where P ≤ 05.

^*CI = confidence interval; aPOR = adjusted prevalence odds ratio.

^†aPOR was adjusted for age, sex, region, farm type, and value of sales.