Table 1.

Demographics of unique persons in the MarketScan study population, 2003-2013

Characteristic (N=71,577,118)		Total N	%	N unique persons with at least 1 asthma claim	%	N unique persons with at least 2 asthma claims	%
Gender
Male		34,380,820	48%	1,486,408	36%	354,533	31%
Female		37,196,298	52%	2,680,079	64%	793,031	69%
Age
18-30		20,487,389	29%	918,545	22%	217,570	19%
31-40		15,968,962	22%	892,349	21%	238,337	21%
41-50		16,628,351	23%	1,046,318	25%	299,838	26%
51-65		18,492,416	26%	1,309,275	31%	391,819	34%
Rural-Urban Status
RUCC1: Metro-urbanized		60,390,968	84%	3,568,689	86%	989,877	86%
RUCC2: Non-metro-urbanized		4,594,342	6%	256,168	6%	68,538	6%
RUCC3: Less urbanized		5,620,691	8%	293,342	7%	76,944	7%
RUCC4: Thinly populated		971,117	1%	48,288	1%	12,205	1%

^a.Excludes records which could not be geocoded to county.