TABLE I.

CHARACTERISTICS OF CASES AND CONTROLS BY ASTHMA HISTORY

	Nonasthmatics (n = 1,088)		Asthmatics (n = 123)
Characteristics	Cases (n = 602)	Controls (n = 486)	Cases (n = 66)	Controls (n = 57)
Age
<45	103 (17.1)	85 (17.5)	14 (21.2)	9 (15.8)
45–64	290 (48.2)	214 (44.0)	34 (51.5)	27 (47.4)
≥65	209 (34.7)	187 (38.5)	18 (27.3)	21 (36.8)
Gender
Male	346 (57.5)	257 (52.9)	33 (50.0)	28 (49.1)
Female	256 (42.5)	229 (47.1)	33 (50.0)	29 (50.9)
Race
Black	70 (11.6)	111 (22.8)	11 (16.7)	15 (26.3)
White	485 (80.6)	345 (71.0)	47 (71.2)	35 (61.4)
Other	47 (7.8)	30 (6.2)	8 (12.1)	7 (12.3)
State of residence
Detroit	147 (24.4)	84 (17.3)	12 (18.2)	9 (15.8)
Iowa	154 (25.6)	119 (24.5)	12 (18.2)	5 (8.8)
Los Angeles	158 (26.3)	151 (31.1)	24 (36.4)	21 (36.8)
Seattle	143 (23.7)	132 (27.2)	18 (27.3)	22 (38.6)
Hospitalized for asthma
No	–	–	35 (53.0)	36 (63.2)
Yes	–	–	31 (47.0)	21 (36.8)
Daily medication for asthma
No	–	–	35 (53.0)	27 (47.4)
Yes	–	–	31 (47.0)	30 (52.6)