Table 3.

International COPD Genetics Consortium: Approximate current study population sample sizes

	Cases	Controls
Case-Control Studies (or Case-Only Studies)	23,039	15,610
Cohort Studies	16,526	115,956
Combined Set	39,565	131,566
GWAS in Combined Set Currently Available	14,741	37,612

Notes: For this table, approximate sample sizes from Table 1 were used as actual values. Only subjects with spirometry from Table 1 were included in these calculations (MESA Lung SHARe was excluded). Population-based studies with a family component (e.g., Framingham) are listed under “Cohort Studies,” while other pedigree-based studies (e.g. International COPD Genetics Network) have been excluded. For the “GWAS in Combined Set Currently Available,” only subjects with available genotyping by December 2010 were included.