Characteristics	MarketScan Population	New IPN Study Population
Number of members	23 769 995	15 064
Age-band
0-17	5 950 248 , 25.0%	- , 0.0%
18 - 34	5 917 333 , 24.9%	915 , 6.1%
35 - 44	4 079 950 , 17.2%	2362 , 15.7%
45 - 54	4 813 328 , 20.2%	5843 , 38.8%
55 - 64	3 009 136 , 12.7%	5944 , 39.5%
> 64	- , 0.0%	- , 0.0%
Average Age	33	50
Gender
Male	11 634 010 , 48.9%	6728 , 44.7%
Female	12 135 985 , 51.1%	8336 , 55.3%
Region1
Northeast	4 678 458 , 19.7%	3220 , 21.4%
North central	5 275 787 , 22.2%	3566 , 23.7%
South	8 426 106 , 35.4%	6205 , 41.2%
West	4 805 788 , 20.2%	2053 , 13.6%
Identified Current/Former Smokers	971 280 , 4.1%	3268 , 21.7%
Per member medical costs in 20142	$3583.32	$19 386.90