From: Agreement between aggregate and individual-level measures of income and education: a comparison across three patient groups
Asthma
n(%)
Diabetes
Rheumatoid Arthritis
p-value*
<20,000
5 (6)
2 (7)
0 (0)
0.44**
20,000-50,000
54 (64)
36 (49)
31 (44)
0.03
>50,000
76 (60)
99 (83)
49 (74)
0.0002