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. Author manuscript; available in PMC: 2015 Aug 18.
Published in final edited form as: Nature. 2008 Apr 3;452(7187):638–642. doi: 10.1038/nature06846

Table 1.

Demographics, Age and Phenotype Breakdown.

Study Group Cases Controls
N male / female Age (SD) N male / female Age (SD)
Smoking phenotypes
Cigarettes per day available
Iceland 13,945 6,134 / 7,811 58.7 (17.8)
Spain 523 354 / 169 54.0 (16.3)
Netherlands 1,375 762 / 613 61.5 (10.2)
Nicotine Dependence (Iceland) 2,394 800 / 1,594 48.1 (11.0) 28,455 12,600 / 15,855 58.7 (21.8)
Never smokers (Iceland) 4,203 1,273 / 2,930 55.4 (21.6)
Lung Cancer
Iceland 665 346 / 319 69.7 (11.1) 28,752 12,174 / 16,578 56.8 (21.5)
Spain 269 238 / 31 64.9 (11.6)
Netherlands 90 71 / 19 68.5 (9.5)
Peripheral Arteial Disease
Iceland 1,503 926 / 577 74.2 (10.6) 28,752 12,174 / 16,578 56.8 (21.5)
New Zealand 441 251 / 189 70.6 (9.6) 435 248 / 187 68.2 (6.4)
Austria 457 322 / 135 68.4 (11.0) 403 284 / 119 67.3 (10.7)
Sweden 172 92 / 80 77.5 (9.9) 140 64 / 76 67.9 (1.5)
Italy 165 111 / 54 73.0 (9.3) 234 162 / 72 72.6 (6.4)