Table 1.

Characteristics of sleep apnea cases and controls in the ALHS

	Sleep Apnea cases (n=234)	Non-cases (n=1335)
Characteristic	n (%)/mean (SD)	n (%)/mean (SD)
Asthma
No	113 (48.3)	934 (70.0)
Yes	121 (51.7)	401 (30.0)
State of residence
Iowa	176 (75.2)	924 (69.2)
North Carolina	58 (24.8)	411 (30.8)
Cardiovascular Disease
No	205 (87.6)	1292 (96.8)
Yes	29 (12.4)	43 (3.2)
Hypertension
No	113 (48.3)	855 (64.0)
Yes	121 (51.7)	480 (36.0)
Diabetes
No	186 (79.5)	1212 (90.8)
Yes	48 (20.5)	123 (9.2)
Age at home visit (years)	64.7 (10.6)	63.2 (11.6)
Body Mass Index (BMI)	34.5 (6.1)	29.8 (5.6)

Definition of Abbreviation: ALHS = Agricultural Lung Health Study