Total (n = 96,595) Asthma cohort* (n = 19,319) Control cohort (n = 77,276)
p-value
Age, years 49 (36–64) 49 (36–64) 49 (36–64)
Age group > 0.99
Twenties 11,880 (12.3) 2,376 (12.3) 9,504 (12.3)
Thirties 19,255 (19.9) 3,851 (19.9) 15,404 (19.9)
Forties 18,370 (19.0) 3,674 (19.0) 14,696 (19.0)
Fifties 15,750 (16.3) 3,150 (16.3) 12,600 (16.3)
Sixties 16,610 (17.2) 3,322 (17.2) 13,288 (17.2)
Seventies 14,730 (15.3) 2,946 (15.3) 11,784 (15.3)
Sex > 0.99
Male 34,720 (35.9) 6,944 (35.9) 27,776 (35.9)
Female 61,875 (64.1) 12,375 (64.1) 49,500 (64.1)
Type of insurance < 0.01
Self-employed health insurance 39,519 (40.9) 7,369 (38.1) 32,150 (41.6)
Employee health insurance 52,047 (53.9) 10,198 (52.8) 41,849 (54.2)
Medical aid 5,029 (5.2) 1,752 (9.1) 3,277 (4.2)