Table 1: Ischemic stroke patient characteristics and antiplatelet agents prescribed: NAMCS, NAMCS 2000–2007a,b.


Characteristic
Survey Year
2000-012002-032004-05 2006-07
( )( )( )( )
Population estimate%Population estimate%Population estimate%Population estimate%

Total ischemic stroke visits2,221,277100%2,238,540100%2,917,650100%2,150,851 100%

Race
 White1,605,40872.3%1,760,41078.6%2,266,60377.7%1,716,21079.8%
 Black448,73920.2%184,0648.2%551,03618.9%392,53618.3%
 Other167,1307.5%294,06613.1%100,0113.4%42,1052.0%

Region
 Northeast340,30215.3%509,92222.8%393,47213.5%339,93815.8%
 Midwest 491,28022.1%366,34716.4%1,058,70636.3%536,40824.9%
 South703,36431.7%579,15025.9%1,119,71938.4%928,22643.2%
 West686,33130.9%783,12135.0%345,75311.9%346,27916.1%

Age
 18–44 years46,9072.1%141,9376.3%137,6654.7%116,6525.4%
 45–64 years549,18924.7%536,33824.0%885,61730.4%673,63531.3%
 ≥65 years1,625,18173.2%1,560,26569.7%1,894,36864.9%1,360,56463.3%

Gender
 Female1,177,72753.0%1,196,81353.5%1,572,90553.9%834,07638.8%
 Male1,043,55047.0%1,041,72746.5%1,344,74546.1%1,316,77561.2%

Insurancec
 Private insurance523,03523.5%553,31424.7%860,71229.5%633,12229.4%
 Medicare1,488,00267.0%1,364,73861.0%1,538,34352.7%1,224,08756.9%
 Medicaid76,7213.5%61,6212.8%106,8243.7%128,9876.0%
 Other90,9394.1%206,4769.2%145,7525.0%75,4903.5%

Location
 MSAd1,580,13871.1%2,003,57889.5%2,546,76887.3%1,986,97092.4%
 Non-MSA641,13928.9%234,96210.5%370,88212.7%163,8817.6%

Antiplatelet prescribing
 Overall antiplatelet agents623,99828.1%641,90028.7%1,101,78637.8%1,010,46247.0%
 Aspirin only360,06716.2%244,85510.9%213,0347.3%377,00217.5%
 Clopidogrel only107,8734.9%151,7646.8%327,14811.2%231,65210.8%
 Aspirin and clopidogrel 23,5421.1%192,7798.6%456,78715.7%305,70214.2%
 Aspirin and dipyridamole 118,1835.3%47,8612.1%104,8173.6%96,1064.5%
 Dipyridamole only3,1480.1%00.0%00.0%00.0%
 Ticlopidine only11,1850.5%4,6410.2%00.0%00.0%

Setting
 Physician office1,502,37067.6%1,550,68769.3%2,231,05476.5%1,493,69969.4%
 Hospital OPD65,0652.9%102,1964.6%62,8472.2%92,8254.3%
 Hospital ED653,84229.4%585,65726.2%623,74921.4%564,32726.2%

aNAMCS: National Ambulatory Medical Care Survey, NHAMCS: National Hospital Ambulatory Medical Care Survey.
bPopulation estimates were calculated using SAS-callable SUDAAN software, version 10.0.1 (Research Triangle Institute) to obtain proper variance estimations that accounted for the complex sampling design of the National Ambulatory Medical Care Survey and National Hospital Ambulatory Medical Care Survey and results that were weighted to reflect national population estimates.
cInsurance (payment source) does not sum to 100% because of missing data, dMSA: Metropolitan Statistical Area.