Table 3. Agreement of asthma cases and non-cases classified by self-report, the Danish National Patient Register (DNPR) and the Register of Medicinal Product Statistics (RMPS).

	Agreement among cases	Agreement among non-cases
Self-report vs. DNPR	65%	91%
DNPR vs. Self-report	31%	98%
Self-report vs. RMPS	33%	98%
RMPS vs. Self-report	86%	77%
DNPR vs. RMPS	17%	99%
RMPS vs. DNPR	90%	72%